Combinatorial CVD

组合CVD

• 批准号: EP/H00064X/1
• 负责人: Ivan Parkin
• 金额: $ 103.78万
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH00064X%2F1
• 关键词: Combinatorial; CVD

This is an application for a Platform for baseline funding to support the joint Carmalt/Parkin research group. Parkin and Carmalt have collaborated extensively in the area of Chemical Vapour Deposition (CVD). Carmalt has focussed on the synthesis of molecular precursors for use in CVD, whereas Parkin has concentrated on the CVD growth and functional characterisation of thin films from these and other precursors. In the course of this research they have, unusually for CVD, discovered a wide number of new phases especially metal nitride, oxide, sulfide and selenide materials that had proven due to kinetic reasons and precursor design, unobtainable by conventional solid-state synthesis. They have also determined how to control preferred growth and orientation of crystallites grown by CVD. This has enabled them to grow materials with improved functional properties for a variety of applications from gas-sensors, through ultraphobic, superhydrophilic surfaces to thermochromic and self-cleaning films. The pinnacle of this work, especially for new phase determination has been their use of combinatorial CVD for the synthesis of new materials. Combinatorial CVD is currently the major focus of the Carmalt and Parkin joint group and is a significant component of all of their current EPSRC funding. This methodology has enabled them, for example, to make a range of new mixed metal oxide photocatalysts and a new series of Ti3O4-xN1 phases (see J. Am. Chem. Soc., 2006, 128, 12147-55; J. Am. Chem. Soc., 2007, 17, 4652-60). The combinatorial CVD process has extraordinary potential. The applicants have shown how, for example, in a single CVD experiment up to 800 different phase compositions can be made. They have also shown how this large phase range can be explored in a robotic fashion using programmed movable X-Y stage Raman, electrical conductivity and X-ray measurements such that the whole phase space can be mapped in overnight experiments. This technique offers the potential to rapidly search for new phases and to explore a systematic range of compositions to determine which combination of materials leads to the best functional properties. They are then able to adjust the synthesis conditions and make the desired phase. The work is primarily focussed at making thin films, however they have shown through a delamination methodology that they can make gram quantities of materials. They wish to take advantage of this unique technique and develop its potential in three main areas;* The preparation of new visible light photocatalysts for water splitting and antimicrobial applications- such materials have potential to revolutionalise energy generation and reduce hospital acquired infections.* The preparation of thin films for use as ultra-sensitive gas sensors- we plan to incorporate such materials to develop a single breath sensor, this could be used routinely in a surgery by a doctor for disease diagnosis (over 30 diseases can be diagnosed from exhaled breath- however current analysis requires shipment to a lab and takes over a week).* The synthesis of new precursors for use as photovoltaic thin films and transparent conducting films. For example; develop low pressure combinatorial CVD to form improved semiconductor materials including indium gallium selenides and related materials, the aim of this subproject is to achieve low processing cost, high throughput and high quality film deposition of these important ternary and higher order materials using combinatorial LPCVD. Thin films of graded composition will be grown by using low pressure chemical vapour deposition with two/three separate precursor gas streams, e.g. one for indium selenide, one for gallium selenide and one for copper selenide. Diffusion of the gas streams allows graded compositions (e.g. CuGaxIn1-xSe2) across the whole plate.

这是一个申请基线资金平台的申请，以支持Carmalt/Parkin联合研究小组。Parkin和Carmalt在化学气相沉积(CVD)领域进行了广泛的合作。Carmalt专注于用于CVD的分子前体的合成，而Parkin专注于由这些和其他前体制备的薄膜的CVD生长和功能表征。在这项研究的过程中，他们发现了大量的新相，特别是金属氮化物、氧化物、硫化物和硒的材料，这在CVD中是不寻常的，由于动力学原因和前驱体设计，这些材料是传统固相合成无法获得的。他们还确定了如何控制CVD生长的晶体的择优生长和取向。这使得他们能够生长出具有更好的功能特性的材料，用于从气体传感器到超疏水、超亲水表面到热致变色和自清洁薄膜的各种应用。这项工作的顶峰，特别是新相的确定，是他们使用组合CVD来合成新材料。组合心血管疾病目前是Carmalt和Parkin联合小组的主要重点，也是他们目前EPSRC资金的重要组成部分。例如，这种方法使他们能够制造一系列新的混合金属氧化物光催化剂和一系列新的Ti3O4-XN1相(参见J.Am化学。社会科学院，2006年，128号，12147-55年；J.Am化学。SoC.，2007，17,4652-60)。组合CVD过程具有非凡的潜力。例如，申请人展示了如何在一次CVD实验中制造多达800种不同的相组成。他们还展示了如何使用可编程的可移动X-Y级拉曼、电导率和X射线测量以机器人方式探索这一大的相范围，以便在夜间实验中绘制整个相空间。这项技术提供了快速寻找新相和探索一系列系统组成的可能性，以确定哪种材料组合可以产生最佳的功能性能。然后，他们能够调整合成条件并生成所需的相。这项工作主要集中在制造薄膜上，然而，他们通过分层方法证明了他们可以制造克数量的材料。他们希望利用这种独特的技术，并在三个主要领域开发其潜力：*制备用于分解水和抗菌应用的新型可见光催化剂--这种材料具有革命性地改变能源产生和减少医院感染的潜力。*制备用作超灵敏气体传感器的薄膜--我们计划结合这种材料开发一种单一的呼吸传感器，这种传感器可以常规用于医生的手术中，用于疾病诊断(超过30种疾病可以通过呼气诊断--然而目前的分析需要运往实验室，需要一周多的时间)。*合成新的前体，用作光伏薄膜和透明导电膜。例如，开发低压组合CVD以形成包括铟、镓、硒及相关材料在内的改进的半导体材料，该子项目的目标是利用组合LPCVD实现这些重要的三元和高阶材料的低加工成本、高产量和高质量的薄膜沉积。采用低压化学气相沉积技术，用两种/三种不同的前驱体气体，例如一种是硒化铟，一种是硒化镓，一种是硒化铜，可以生长出成分不同的薄膜。气流的扩散允许分级成分(例如，CuGaxIn1-xSe2)横跨整个平板。

项目成果

Visible light photocatalysts-N-doped TiO2 by sol-gel, enhanced with surface bound silver nanoparticle islands

• DOI: 10.1039/c1jm11557j
• 发表时间: 2011-01-01
• 期刊: JOURNAL OF MATERIALS CHEMISTRY
• 作者: Dunnill, Charles W.;Ansari, Zarrin;Parkin, Ivan P.
• 通讯作者: Parkin, Ivan P.

Aerosol-assisted deposition of gold nanoparticle-tin dioxide composite films

• DOI: 10.1039/c3ra46828c
• 发表时间: 2014-01-01
• 期刊: RSC ADVANCES
• 影响因子: 3.9
• 作者: Chew, Clair;Bishop, Peter;Parkin, Ivan P.
• 通讯作者: Parkin, Ivan P.

Copper-doped CdSe/ZnS quantum dots: controllable photoactivated copper(I) cation storage and release vectors for catalysis.

• DOI: 10.1002/anie.201308778
• 发表时间: 2014-02-03
• 期刊: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
• 影响因子: 16.6
• 作者: Bear, Joseph C.;Hollingsworth, Nathan;McNaughter, Paul D.;Mayes, Andrew G.;Ward, Michael B.;Nann, Thomas;Hogarth, Graeme;Parkin, Ivan P.
• 通讯作者: Parkin, Ivan P.

Assessing the potential of metal oxide semiconducting gas sensors for illicit drug detection markers

• DOI: 10.1039/c4ta00357h
• 发表时间: 2014-01-01
• 期刊: JOURNAL OF MATERIALS CHEMISTRY A
• 影响因子: 11.9
• 作者: Hernandez, P. Tarttelin;Naik, A. J. T.;Parkin, I. P.
• 通讯作者: Parkin, I. P.