留学美国签证研究计划模板大全

留学美国签证研究计划模

板大全

Descriptions of the research plan

Title: Synthesis, Formation Mechanism, and Properties of Different Metal/Metal Nanostructures Keywords: Multi-Shell Nanostructures, Ionic Liquids, Electrochemistry, Multi-Functionality,

Porous Metal Materials, Low-Dimensionality, Green Chemistry Objectives: This program is to develop a novel method for fabricating heterogeneous or alloyed different metal/metal low-dimensional nanostructures, for example, multi-shell or porous Ag-Au nanowires, nanorods, and nanocubes using an ionic liquid as both the solvent and shape-inducing template. Synthesis of ionic liquids (ILs) with different alkyl chains and functional groups, as well as the formation of different metal/metal nanostructures with new properties are involved in this research plan. Alloyed or heterogeneous multi-shell nanostructures are generated by utilizing electrochemical (electroless) deposition or a simple galvanic replacement reaction in ILs. By controlling the size, shape, composition, crystal structure and surface properties of these structures, it enables us not only to uncover their intrinsic properties, but exploit their formation mechanism in ILs media, as well as their applications in catalysis, surface-enhanced Raman scattering (SERS), sensors, porous electrodes, etc. This green chemistry process also may be extended to synthesize other organic and inorganic nanostructures with novel properties, morphology and complex form. State-of-the-art

Metal nanostructures have numerous applications as nanoscale building blocks, templates, and components in chemical and biological sensors, as well as electronic/optical devices, due to their interesting optical, catalytic and electrical properties that depend strongly on both size and shape. Over the past decade, impressive progress has been made towards the fairly good shape and size control of metal nanostructures [1][2]. For noble metals, more emphasis is placed on tuning the novel shape-dependent properties of these nanostructures in contrast to the size-dependency. A variety of metallic building blocks with unique properties have been synthesized including cubes [3][4], prisms [5], disks [6], and hollow nanostructures [7]. Currently the interests migrate to the synthesis and application of more complex structures with different metals, such as multi-shell and heterogeneous nanostructures having new properties[8][9], coupling a conception for optimizing preparative strategies in an environmentally benign system[10]. Therefore, besides creating novel nanostructures with unique properties, a problem arising from the utilization of volatile or poisonous organic solvents and additives is of much concern in view of cleaner technology throughout both industry and academia.

Most of the current shape selective synthesis of metal nanostructures that their optical properties are markedly affected by their shape and aspect ratio are centered either on a solid substrate by physical methods or in aqueous or organic media through chemical procedures [2]. For instance, complex and highly regular crystalline silver inukshuk architectures can be produced directly on a germanium surface through a simple galvanic displacement reaction that only three ingredients were required: silver nitrate, water, and germanium [11]. Despite these advancements, however, limited reports have been reported on how the particle morphology and dimensionality could be

regulated by the utilization of ILs[12].

Recently, environmentally benign room-temperature ionic liquids (RTILs) have received increasing attention worldwide due to their favorable properties including excellent thermal and chemical stability, good solubility characteristics, high ionic conductivity, negligible vapor pressure, nonflammability, relatively low viscosity, and a wide electrochemical window. This class of fluid materials contains complicated molecular interactions such as ionic interactions, hydrogen bonding, л-л interactions, and amphiphilic polarization, rendering various molecul ar structures from merely local orderness up to macroscopic thermo tropic or lyotropic liquid crystalline phases [13]. These advantages make them actively being employed as green solvents for organic chemical reactions, extraction and separation technologies, catalysis, solar cells, and electrochemical applications[14][15].

In contrast to tremendous growth in R&D on application of ionic liquids to chemical processing, the use of RTILs in inorganic synthesis is still in its infancy. There have been only a few reports on the shape-and-dimension controlled formation, by using RTILs, of hollow TiO2 microspheres [16] and nanowires of palladium [17], gold nanosheets [12], tellurium nanowires [18], flower-like ZnO nanostructures [19], and CuCl nanoplatelets [20]. So far, alloyed metal structures, either spherical nanoparticles or nanocomposite films, have been generated in RTILs using electrochemical deposition of nanocrystalline metals such as Al-Fe, and Al-Mn alloys on different substrates [21]. However, formation of multi-shell or hollow nanostructures by controlling both the shape and dimension in RTILs has not yet appeared in literature, especially using an electrochemical approach. It is therefore proposed in this program that a new route to optically or catalytically tune the properties of complex metal/metal nanostructures through the control of shape anisotropy and surface morphology is established in RTILs using a green chemistry approach. The reasons we choose RTILs as reaction media are not only in the view of environment protection, but in the consideration of their diversiform molecular structures, which could be used as shape-inducing templates for the synthesis of new nanostructures. It is very unlikely that ILs will entirely replace organic solvents or aqueous systems or gas phase processes for the fabrication of inorganic matter. Nevertheless, ionic liquids with different functional groups may provide a means to fabricate nanostructures that are not otherwise available. The applicant has accumulated good backgrounds in shape-controlled synthesis and characterization of metal and semiconductor low-dimensional nanostructures with unique optical properties. A series of approaches have been used to fabricate Ag-SiO2, and Ag-TiO2 core-shell nanostructures and Ag-SiO2-TiO2 nanocomposite films. During the Ph.D program, novel soft sol and polymer-assisted methods have been developed to form metal and semiconductor nanorods and wires, such as silver and gold nanowires, CdS and ZnS nanowires and rods, as well as anisotropic metal nanocrystals, for example, silver nanoprisms, gold nanocubes, nanodisks, and so on [22][23]. At the same time, tuning the optical properties through the interaction of nanostructures with femtosecond laser pulses to control the size, shape or dimension in nanometer regime has also been investigated [24]. As for the institution to which the applicant is applying and the group of Professor XXXXXXX, equipments including TEM, SEM, UV-Vis-NIR absorption spectrometer and other emission spectrometer (static, time-resolved and temperature dependent), as well as the group’s excellent research experience in semiconductor and metal nanomaterials [25][26] provide a sound foundation for the implementation of this

出国签证在职证明中英文

XXXXXXXXXXXX Ltd. Date:1-JAN-2015 To:EmbassyoftheUnitedStates DearVisaofficer: Thisistocertifythat Mr.XXXXXX worksinourcompanyas XXXXXXXX s incetheyearof XXXX.His/HermonthlysalaryisRMB XXXX.He/Shewi llhaveatourtotheUnitedStatesofAmericafrom22SPE2016to05OC T2016. His/Herinformationislistedasfollows, Allthetravellingexpenses,includingairtickets,transportat ion,accommodationandhealthinsurance,willbecoveredbyhimse lf/herself. Weherebyguaranteethathe/shewillabidebyallthelawsandregul ationsduringhisstayingabroad.Wealsoguaranteethathe/shewi llbebacktoChinaonscheduleandwillcontinuetoworkforourcomp any. Yourssincerely CompanyName:公司英文名称 Add:地址

Tel:电话 Nameoftheleader:领导姓名 Signature： XX市XXXX有限公司 在职证明 尊敬的美国大使馆签证官： 兹证明先生/女士自年来我公司任职，职位是。他/她的月收入是人民币元。他/她将于年月日到年月日赴美国旅游。 他/她的具体信息如下： 此次旅游的所有费用包括：机票费，住宿费和医疗保险等均由他本人承担。我们保证他/她在国外旅游期间将会遵守当地的法律法规。我们也保证他/她将会按时回国并继续在我公司工作。特此证明！ 单位名称： 单位地址： 单位电话： 经办人姓名： 经办人职位： 经办人签名： 公司盖章： 日期：年月日

美国签证个人简历模板_模板

美国签证个人简历模板_模板 美国签证个人简历模板 某网友针对非移民签证申请人如果需要写个人简历模版，大家可以参考一下。 Nonimmigrant Visa Resume Template Name: Date and country of birth: Gender: Name and date of birth of spouse: （if applicable） Names and dates of birth of children: （if applicable） Address and Contact information: Education List here all universities and higher education institutions you have attended, starting with the most recent. You should include the following information: Name of university Dates of study Degree level Degree major and minors Area of research Title of thesis Work experience List here all paid and voluntary work you have performed and positions held, starting with the most recent. You should include the following information: Name of company, organization or institutions Job titles Dates of jobs Detailed area of responsibility, research interests, project descriptions and applications of research Expertise in special software, machinery op equipment Awards and patents Have you received/won any awards related to your research or work at university or at work? Please list these. Do you hold any patents? List name, patent number and year registered. List of publications List here all your publications you have published in China and overseas. Include the title of the published article, the date it was published and the name of the magazine, newspaper, book, etc it was published in. Other outside interests/experience List here any clubs you belong to, any memberships you hold, your interests and hobbies Other skills For example computer skills, languages you speak, driver’s license or other permits, etc Travel Have you ever traveled overseas? List countries, purpose and dates of travel

美国签证在职证明模板

用公司抬头纸打印 Certificate 在职证明 Date: 3.Mar.2011 The Embassy of the United States， The above mentioned delegate is holding the Chi nese Common Passport. 我公司证明以上持有中国普通护照旅行团成员， He（若女性改She）has been a staff of our company since03.2007（填写入职时间）, Our company has issued the social security insurance for he(若女性改she). 为我公司正式员工，入职时间**年**月，我公司为其缴纳社会养老保险。 He（若女性改She）is applying for visa to America from 4th Apr 2011 to 13th Apr 2011. 其本人目前正在申请访美签证，旅行时间自2011年4月4日至2011年4月13日。During his(若女性改her) visit, he(若女性改she) will be responsible to settle all the travel expenses including airfare, accommodation and all other personal expenses. 在其访美期间，旅行全部费用由本人承担。 We understand that he(若女性改she)will return to China on schedule. We will keep his(若女性改her) position during his visit in America. 我公司保证他将按期回国，在其访美期间，我公司将保留其岗位、薪水。 Y ours faithfully, Management Dept. （公司人力资源部经理签名、盖公章或人力资源部章） ________________________________（公司中、英文全称） Add：____________________________ （中、英文公司地址） T el： （人力资源部电话） Fax： （公司传真）

美国f1签证学习计划中英文范本

美国f1签证学习计划中英文范本 来源：转载 2012-4-13 12:31:59 编辑：爱是熬伤的糖 学校名称：特拉华大学 University of Delaware 所在位置：美国，Newark 学校类型：大学 创建时间：1743年 学校性质：公立 学生人数：23000人 留学学费：40000 美元 学校中文网址：https://www.sodocs.net/doc/5810212286.html,/abroad/College/Index-125.html 美国f1签证学习计划中英文范本 在申请f1签证的过程中，签证申请者经常会被要求写学习计划书(study plan)，目的是通过学习计划书使签证官了解您的背景，选择留学专业的动机条件，选择该国留学的理由，和清晰的未来留学时间安排，职业目标和回国理由，因此学习计划书是一份很关键的文件。本文提供了两份f1签证学习计划样本，希望对大家有所帮助。 Study plan范例1： 学习计划样本 Many scholars consider the Economy as the basic structureof society and the motive power of history. In any event, no one in the world can stay away from the effect of economy. It was with this observation that I chose Economics as my major when I was admitted to People’s University. Since graduation in July 2000, I have been working as an assistant with the Council for Economic Planning and Development, Executive Zhang. This position enabled me to realize how important the government’s economic plans are to people’s livelihood. And I feel that the Government of the PRC has done a good job in this regard. In recent years, industry and commerce have developed by leaps and bounds. In order to make greater contribution to the economic development of this country, I wish to further my study in the field of Economics, working toward a Master’s degree at first, and then, if possible, toward a doctoral degree. After completing the studies, I plan to return to China and Seek a teaching position in an institution higher learning. 中文释义： 许多学者认为经济是社会的基础结构和历史的动力。无论如何，世上没有人能脱离经济的影响。正是出于这一观察，我考入人民大学，攻读经济学专业。

美国签证在职模板证明

( 证明书) 姓名：____________________ 单位：____________________ 日期：____________________ 编号：YB-BH-063266 美国签证在职模板证明U.S. visa in service template certification

美国签证在职模板证明 签证在职证明模版样式一 CERTIFICATION Dear Visa Officer: XXXX(客人姓名) works at our unit as XXXX(职务). He/She is going to New Zealand for travelling from XX.XXXX to XX.XXXX(出行时间某年某月). His/Her information is listed as follows, We guarantee that he/she will abide by all the laws and regulations during his/her staying in your county and he/she will come back to China on time. All of his/her travelling expenses will be covered by himself/herself (付费情况), please kindly issue his/her visa. Thank you very much. Yours Sincerely Unit Name: XXXX(单位名称) Unit Add: XXXX(单位地址) Tel: XXXX(单位电话) Signature of Leader(领导人签名)

留学美国签证研究计划模板大全

留学美国签证研究计划模板大全（1） Descriptions of the research plan Title: Synthesis, Formation Mechanism, and Properties of Different Metal/Metal Nanostructures Keywords: Multi-Shell Nanostructures, Ionic Liquids, Electrochemistry, Multi-Functionality, Porous Metal Materials, Low-Dimensionality, Green Chemistry Objectives: This program is to develop a novel method for fabricating heterogeneous or alloyed different metal/metal low-dimensional nanostructures, for example, multi-shell or porous Ag-Au nanowires, nanorods, and nanocubes using an ionic liquid as both the solvent and shape-inducing template. Synthesis of ionic liquids (ILs) with different alkyl chains and functional groups, as well as the formation of different metal/metal nanostructures with new properties are involved in this research plan. Alloyed or heterogeneous multi-shell nanostructures are generated by utilizing electrochemical (electroless) deposition or a simple galvanic replacement reaction in ILs. By controlling the size, shape, composition, crystal structure and surface properties of these structures, it enables us not only to uncover their intrinsic properties, but exploit their formation mechanism in ILs media, as well as their applications in catalysis, surface-enhanced Raman scattering (SERS), sensors, porous electrodes, etc. This green chemistry process also may be extended to synthesize other organic and inorganic nanostructures with novel properties, morphology and complex form. State-of-the-art Metal nanostructures have numerous applications as nanoscale building blocks, templates, and components in chemical and biological sensors, as well as electronic/optical devices, due to their interesting optical, catalytic and electrical properties that depend strongly on both size and shape. Over the past decade, impressive progress has been made towards the fairly good shape and size control of metal nanostructures [1][2]. For noble metals, more emphasis is placed on tuning the novel shape-dependent properties of these nanostructures in contrast to the size-dependency. A variety of metallic building blocks with unique properties have been synthesized including cubes [3][4], prisms [5], disks [6], and hollow nanostructures [7]. Currently the interests migrate to the synthesis and application of more complex structures with different metals, such as multi-shell and heterogeneous nanostructures having new properties[8][9], coupling a conception for optimizing preparative strategies in an environmentally benign system[10]. Therefore, besides creating novel nanostructures with unique properties, a problem arising from the utilization of volatile or poisonous organic solvents and additives is of much concern in view of cleaner technology throughout both industry and academia. Most of the current shape selective synthesis of metal nanostructures that their optical properties are markedly affected by their shape and aspect ratio are centered either on a solid substrate by physical methods or in aqueous or organic media through chemical procedures [2]. For instance, complex and highly regular crystalline silver inukshuk architectures can be produced directly on a germanium surface through a simple galvanic displacement reaction that only three ingredients were required: silver nitrate, water, and germanium [11]. Despite these advancements, however, limited reports have been reported on how the particle morphology and dimensionality could be

美国签证在职证明

美国签证在职证明 Prepared on 22 November 2020

C e r t i f i c a t e o f e m p l o y m e n t Date: XX-XX-XXXX To: Embassy of the United States Dear Sir or Madam: This is to certify that MS. / is a XXXXXX in our company. since XXXX. He/Her annual salary is RMB XXXXXX. and all the travelling expenses, including airplane tickets and accommodation, will be covered by himself/herself. We also guarantee that we will retain her position till the end of the holiday, and she will be back to China and work at the company on schedule. Yours sincerely Company Name: Add: Tel: Position of managers: Signature： 在职证明 日期：xxxx年xx月xx日 致：美国大使馆签证官 兹证明XXX先生/女士是我公司/局一名员工（也可用具体职务）/公务员，自YYYY年MM月开始任职。他/她的月收入是人民币xxxx元。他/她的具体信息如下， 他/她将于YYYY年MM月DD日到YYYY年MM月DD日赴美国旅游，此次旅游的所有费用包括，机票、食宿费等均由他/她本人承担。 我们将保留他/她旅游期间的职位，保证他/她按时回国并继续在我公司/局工作。 单位名称：

美国签证学习计划

篇一：美国f1签证学习计划中英文范本 美国f1签证学习计划中英文范本 来源：转载 2012-4-13 12:31:59 编辑：爱是熬伤的糖 学校名称：特拉华大学 university of delaware 所在位置：美国，newark 学校类型：大学 创建时间：1743年 学校性质：公立 学生人数：23000人 留学学费：40000 美元 美国f1签证学习计划中英文范本 在申请f1签证的过程中，签证申请者经常会被要求写学习计划书(study plan)，目的是通过学习计划书使签证官了解您的背景，选择留学专业的动机条件，选择该国留学的理由，和清晰的未来留学时间安排，职业目标和回国理由，因此学习计划书是一份很关键的文件。本文提供了两份f1签证学习计划样本，希望对大家有所帮助。 study plan范例1： 学习计划样本 it was with this observation that i chose economics as my major when i was admitted to people’s university. since graduation in july 2000, i have been working as an assistant with the council for economic planning and development, executive zhang. this position enabled me to realize how important the government’s economic plans are to people’s livelihood. and i feel that the government of the in order to make greater contribution to the economic development of this country, i wish to further my study in the field of economics, working toward a master’s degree at first, and then, if possible, toward a doctoral degree. 中文释义： 许多学者认为经济是社会的基础结构和历史的动力。无论如何，世上没有人能脱离经济的影响。正是出于这一观察，我考入人民大学，攻读经济学专业。自2000年7月的毕业以来，我一直担任经济计划和发展委员会张主任的助手。这个位置使我明白了政府的经济计划对人民生活至关重要，在这一方面，我认为中华人民共和国政府做得很好。近几年来，工业和商业有了飞速发展。 为了在我国的经济发展中作出更大贡献，我希望在经济学领域继续深造，首先获得硕士学位，如有可能，再读博士学位。 在完成学业后，我计划返回中国，去高等学府任教。

美国签证在职证明英文模版

美国签证在职证明英文 模版 文件编码（GHTU-UITID-GGBKT-POIU-WUUI-8968）

Certificateofemployment Date:时间（打印日期即可） To:Consulate-GeneralofU.S.A. Thisistocertifythat Mr/Ms姓名拼音（MR.ZhangSan）is职位 inourcompany.He/She hasbeenworkingheresince年月日（2010-01-01）. Wehaveapproved his/her leave.He/She intendstovisittravelinU.S.A.from去的日期 (July21,2018)to回国日期(August25th)，total天数 (35)days.Pleasegrant him/her thenecessaryvisa,thankyouinadvance. Weguaranteethat he/she willabidebythelawsinyourcountryandregulationsandreturntoChin aontime.Allofthetravelingexpenseswillbepaidby himself/herself.Weagreeandwillkeep hi s/her positionafter he/she comesbacktoChina. Yourk prova lofthisapplicationwillbehighlyappreciated. Yoursincerely！ ManagerPosition: 准假人英文职称 ManagerSignature:准假人姓名拼音（不一定要法人，准假人拼音即可。） 中文签名负责人手写签名 公司盖章 Company:公司英文名称 Tel：（区号）公司电话

美国签证DS160表格中文翻译

DS160表格（中文翻译版） (2011-11-01 16:51:21) 转载▼ 标签： 杂谈 选择签证申请地： （北京、上海、广州、成都、沈阳） 个人信息1 姓名：是否有曾用名：否□是□ 性别：男□女□ 婚姻状况：已婚□单身□丧偶□离异□合法分居□ 出生日期：日月年 出生地：市省国家 个人信息2 国籍： 是否有其它国籍：否□是□国家名称 身份证号码： 美国社会安全号： 美国纳税人身份号码： 地址和电话 家庭地址：街道城市省国家 （英文家庭地址）：街道（street）城市(city) 省(province) 国家邮编： 邮寄地址是否与家庭地址相同：是□否□（其他地址及邮编）电话：（注明区号）家庭电话 工作电话 工作传真 移动电话 电子邮件地址： 护照信息 护照号： 护照本号： 护照签发地：城市省国家 签发日期：日月年 有效期至：日月年 护照是否曾遗失或被盗：否□是□ 旅行信息 您是主申请人：是□不是□ 访美目的：商务会议□游客个人□商务个人旅游□过境卡激光签证□ 学生交流学者□其他□

您是否已经制定了详细的旅行计划? 是□否□ 计划到达日期：日月年（可不填） 到达航班信息： 到达城市： 离开美国日期： 离开航班信息： 离开城市： 请提供在美期间计划访问的地点名称： 停留期限：2周 在美停留住址：（可不填） 城市州邮编（可不填） 支付您行程的个人或组织名称：个人□其他人□公司/组织□ 随行人员信息 您是否有随行人员：是□否□ 您是否作为一个团队或组织的成员：是□否□ 随行人员姓名： 随行人员与您的关系：父母□配偶□子女□其他亲属□朋友□商业伙伴□其他□ 赴美信息 您是否去过美国：是□否□ (选择是，请填写：曾经到美的信息：到达日期：停留时间： ) 您是否获得过美国签证：是□否□ （选择是，请填写：曾经的签证信息：） 上一次获得美国签证的日期：日月年 签证号码：（可不填） 您此次是否申请同类签证：是□否□ 您是否在签发您上次赴美签证的国家再次申请，并且这个国家是否为您的主要居住国家？是□否□ 您是否留取过十指指纹？是□否□ 您的美国签证是否曾经遗失或被盗？是□否□ 您的美国签证是否曾经被注销或者撤消过？是□否□ 您是否曾被拒签、被撤回入境申请：是□否□ 美国联络人（如果您在美国有朋友，填写朋友的信息或酒店的信息：如果没有，此区域可不填） 姓名： 组织名称： 与您的关系：配偶□亲属□商业伙伴□学校官员□朋友□雇主□ 联系人地址： 城市州邮编 电话：（）

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请用公司（单位）抬头信纸打印 Date: 19-JUL-2015 To: Embassy of the United States Dear Visa officer: This is to certify that Mr. XXX XXX works in our company as XXXXXXXX since the year of XXXX. His monthly salary is RMB XXXX. He will have a tour to the United States of America from 22 SPE 2012 to 05 OCT 2012. All the travelling expenses, including air tickets, transportation, accommodation and health insurance, will be covered by himself. We hereby guarantee that he will abide by all the laws and regulations during his staying abroad. We also guarantee that he will be back to China on schedule and will continue to work for our company. Yours sincerely Company Name: 公司英文名称 Add:地址 Website:网址 Tel: 电话 Name of the leader : 领导人姓名 Signature

B1签证DS-160表格教程和样本

STEP 0：输入网址，选择中文语言。 1.请点击https://https://www.sodocs.net/doc/5810212286.html,/genniv/开始填写DS-160。 2.在点击网址后开始的第一页，请在右上角的语言窗口选择“中文”。 3.在这个页面最底部，点击"Start Application",进入正式填表申请。 STEP 1：Getting Started 选择使馆位置、新建申请或载入已有申请 注意：在线申请时，如果连续二十分钟或以上没有填写信息，那么您的申请将会失效，并且所有已经输入的数据将会丢失。 领事处电子申请中心将允许您在线完成申请;但是不在线保存没有填写完整的申请表格。如果由于某种原因您需要暂停在线申请，请在您已填写好的最后一张申请页面底部点击“保存”按钮，并根据指令将申请数据保存至一个文件。当您回到领事处电子申请中心时，可以通过点击“上载上一次的申请”按钮上载之前保存的数据。 在开始申请程序前，请准备好您的护照、以往的签证信息(如果适用)以及与您此次去美国相关的所有文件资料。选择你所在地区所属的领事管(查询见<美国签证指南>)，如BEIIJNG,CHINA，选择以后，会出现测试上传照片的框，你可以忽略此步骤继续填表。 点击选择“Start A New Application”进入下一步。 几点需要注意的地方: 1.开始的时候有个test photo, 不用理它,直接选择start a new application 2.照片要证件照, 要求照片格式为JPG, 大小一定要小于240k ,不然不会上传成功 3.整个填表步骤比较多,建议大家开始填写后,先记录下申请编号,(右上角的数字),随时保存. 这样网络重新链接或者出问题后,恢复用. 网站可以把你的申请保留1个月. 你可以随时登陆继续填写.

美国签证所需资料(内附在职证明等各模板)

美国签证所需材料 1.有效期六个月以上的因私护照。如果有旧护照请携带旧护照原件，如果不能携带旧护照请提供复印件。 2. 美国签证：51X51毫米3个月之内拍摄的彩色免冠照片1张（要求背景须为白色，且露出耳朵）。保留修改好的该照片的电子版。 3. 近期全家福照片，以及外出旅游照片，如出过国请提供和国外著名景点合照数张。 4. 身份证原件，全家户口本原件和结婚证原件。 5. 学历证书原件，在职证明原件，荣誉资格证书原件。 6. 事业单位请提供机构代码证原件，非事业单位请提供营业执照副本原件，如果提供复印件需加盖单位 公章。 7. 申请人在职公司正式信笺开具的证明信（中英文），需单位盖章，领导签字并注明电话（模板见附件）。 8.如申请人为未成年人（未办理身份证），请提供出生证明原件。如申请人为未成年人（未办理身份证）， 不能单独申请签证，必须至少有父母中一方一起出行。如申请人仅随父母中一方出行，请提供委托公证书原件。 9. 工作证原件，个人名片1张。 10.单位简介（最好有彩页或宣传册，如果没有请用公司抬头纸打印详细内容并加盖公章）。 11.如果申请人退休，请提供退休证原件。如申请人在读，请提供学生证原件。 12.申请人资产原件，越多越好（工资收入单、存单、存折，如果是银行卡请到银行打出近半年的对账单 并盖银行章，房产、车产，股票交割单、有价证券及其他能证明本人财产的相关材料，以及配偶名下的资产）。 注意：凡从事过或大学学过化工、物理、电子通信、航天航空、IT尖端产业等人员，都需要提供个人英文简历和个人工作经历情况。 以上辅助类资料，不一定都会用得到，但如果大使馆签证处明确要核查某项时没有，会大大提高拒签风险。 13.如果以探亲为目的的签证申请，则还需要在美一方的邀请资料： A．英文邀请涵，提供大使馆可以查询电话及地址，被邀请人的个人信息（护照号码，姓名，出生日期等）邀请人跟被邀请人的关系，详细说明访美目的、访问的行程、在美停留时间、在美国产生费用谁承担，遵守当地法律法规，按时回国，提供邀请人在美国详细资料（地址，联系电话，在职单位及收入纳税情况。 B．在美一方为美国人：身份证复印件或护照首页复印件等；在美一方为中国人：护照和有效签证的复印件。 14.如果以探亲为目的的签证申请，则还需提供双方关系证明：户口本、结婚证等有关官方的关系证明或 公证书，以及平日合照等。

2017年美国签证在职证明中英文模板

请使用公司信纸 Date: 1-JAN-2016 To: Embassy of the United States Dear Visa officer: This is to certify that Mr. XXX XXX works in our company as XXXXXXXX since the year of XXXX. His/Her monthly salary is RMB XXXX. He/She will have a tour to the United States of America from 23 SPE 2016 to 06 OCT 2016. All the travelling expenses, including air tickets, transportation, accommodation and health insurance, will be covered by himself/herself. We hereby guarantee that he/she will abide by all the laws and regulations during his staying abroad. We also guarantee that he/she will be back to China on schedule and will continue to work for our company. Yours sincerely Company Name: 公司英文名称 Add:地址 Tel: 电话 Name of the leader : 领导姓名 Signature：

2019年美国签证在职证明中英文模板

使用带有公司抬头的信纸 Date: 1-JAN-2019 To: Embassy of the United States Dear Visa officer: This is to certify that Mr. XXX XXX works in our company as XXXXXXXX since the year of XXXX. His/Her monthly salary is RMB XXXX. He/She will have a tour to the United States of America from 24 SPE 2019 to 05 OCT 2019. All the travelling expenses, including air tickets, transportation, accommodation and health insurance, will be covered by himself/herself. We hereby guarantee that he/she will abide by all the laws and regulations during his staying abroad. We also guarantee that he/she will be back to China on schedule and will continue to work for our company. Yours sincerely Company Name: 公司英文名称 Add:地址 Tel: 电话 Name of the leader : 领导姓名 Signature：

留学美国签证研究计划模板大全

留学美国签证研究计划模 板大全

Descriptions of the research plan Title: Synthesis, Formation Mechanism, and Properties of Different Metal/Metal Nanostructures Keywords: Multi-Shell Nanostructures, Ionic Liquids, Electrochemistry, Multi-Functionality, Porous Metal Materials, Low-Dimensionality, Green Chemistry Objectives: This program is to develop a novel method for fabricating heterogeneous or alloyed different metal/metal low-dimensional nanostructures, for example, multi-shell or porous Ag-Au nanowires, nanorods, and nanocubes using an ionic liquid as both the solvent and shape-inducing template. Synthesis of ionic liquids (ILs) with different alkyl chains and functional groups, as well as the formation of different metal/metal nanostructures with new properties are involved in this research plan. Alloyed or heterogeneous multi-shell nanostructures are generated by utilizing electrochemical (electroless) deposition or a simple galvanic replacement reaction in ILs. By controlling the size, shape, composition, crystal structure and surface properties of these structures, it enables us not only to uncover their intrinsic properties, but exploit their formation mechanism in ILs media, as well as their applications in catalysis, surface-enhanced Raman scattering (SERS), sensors, porous electrodes, etc. This green chemistry process also may be extended to synthesize other organic and inorganic nanostructures with novel properties, morphology and complex form. State-of-the-art Metal nanostructures have numerous applications as nanoscale building blocks, templates, and components in chemical and biological sensors, as well as electronic/optical devices, due to their interesting optical, catalytic and electrical properties that depend strongly on both size and shape. Over the past decade, impressive progress has been made towards the fairly good shape and size control of metal nanostructures [1][2]. For noble metals, more emphasis is placed on tuning the novel shape-dependent properties of these nanostructures in contrast to the size-dependency. A variety of metallic building blocks with unique properties have been synthesized including cubes [3][4], prisms [5], disks [6], and hollow nanostructures [7]. Currently the interests migrate to the synthesis and application of more complex structures with different metals, such as multi-shell and heterogeneous nanostructures having new properties[8][9], coupling a conception for optimizing preparative strategies in an environmentally benign system[10]. Therefore, besides creating novel nanostructures with unique properties, a problem arising from the utilization of volatile or poisonous organic solvents and additives is of much concern in view of cleaner technology throughout both industry and academia. Most of the current shape selective synthesis of metal nanostructures that their optical properties are markedly affected by their shape and aspect ratio are centered either on a solid substrate by physical methods or in aqueous or organic media through chemical procedures [2]. For instance, complex and highly regular crystalline silver inukshuk architectures can be produced directly on a germanium surface through a simple galvanic displacement reaction that only three ingredients were required: silver nitrate, water, and germanium [11]. Despite these advancements, however, limited reports have been reported on how the particle morphology and dimensionality could be