权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

The National Centre for Electron Spectroscopy and Surface Analysis

国家电子能谱与表面分析中心

基本信息

批准号：
EP/E025722/1
负责人：
Timothy Noakes
金额：
$ 134.51万
依托单位：
Science and Technology Facilities Council
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2007
资助国家：
英国
起止时间：
2007 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FE025722%2F1
关键词：
National Centre Electron Spectroscopy Surface

项目摘要

X-ray photoelectron spectroscopy (XPS) is recognised as one of the most important and widely applicable techniques for the surface characterisation of materials. Within a sampling depth of a few nm it can provide information on elemental composition, chemical speciation, the depth distribution of species and electronic structure. It is applicable to an enormous range of different materials and with its nanoscale sampling depth is particularly suited to the study of nanostructured materials such as carbon nanotubes, inorganic nanorods and catalyst particles. It is also an important tool for characterising the surfaces of biomaterials and a wide range of thin films, modified surfaces, metals, alloys, oxides, semiconductors, polymers and composites. The National Centre for Electron Spectroscopy and Surface Analysis (NCESS) at Daresbury Laboratory provides access for EPSRC users to a world-class x-ray photoelectron spectrometer - a Scienta ESCA300. This proposal seeks funding for the operation of the facility for 4 years from April 2007 and for the further refurbishment and development of the ESCA300 spectrometer in several important directions. The proposed programme will sustain a high performance facility for photoelectron spectroscopy that is completely unique on the world stage and that is vital to the research programmes of a diverse and thriving user community.The high power rotating anode and monochromatised Al K alpha (hv = 1486.6 eV) x-ray source of the NCESS ESCA300 combined with its high transmission hemispherical analyser and multichannel detector ensure that it is a superb instrument for low energy XPS. In addition, its high energy Cr K beta (hv =5946.7 eV) and Cu K alpha (hv = 8047.8 eV) x-ray sources combined with the high kinetic energy range of the hemispherical analyser provide a unique capability for the high energy XPS of materials. The NCESS user community have given overwhelming support to this proposal in the form of research proposals to use the facility in the 4 years from April 2007. The majority of the user groups particularly require the high performance and unique characteristics of the NCESS ESCA300 and without access to the spectrometer their research would not be possible. For a small number of user groups it is the only XPS spectrometer to which they have access, and the open and transparent access arrangements together with the reliability of the instrument and the dedicated scientific support of the staff are crucially important to the success of their research.The user research contributions received in support of this proposal indicate a total requirement of between 290 and 320 days access per year and the facility will undertake to deliver 160 days per year. From April 2007 there will be at least 5 EPSRC grants in place with a total value of over 1.5M, specifically requiring access to NCESS. The continued funding of NCESS will ensure that EPSRC can meet its commitments to these and other grant holders while attracting an increasingly diverse UK and international user community. With the run down of the Daresbury SRS towards closure in December 2008 and the absence of soft x-ray photoemission beamlines on DIAMOND until 2011, NCESS will be the only UK national facility capable of soft x-ray electron spectroscopy for several years to come. Furthermore, for the foreseeable future NCESS will be the only UK based facility, and one of only a few international facilities, capable of high energy XPS, i.e. capable of using photons with hv > 5000 eV. Taken together these factors lead to the expectation of a high and increasing demand for access to the facility.

X射线光电子能谱（XPS）被认为是材料表面表征的最重要和最广泛应用的技术之一。在几纳米的取样深度内，它可以提供关于元素组成、化学形态、物种的深度分布和电子结构的信息。它适用于各种不同的材料，其纳米级的采样深度特别适合于纳米结构材料的研究，如碳纳米管，无机纳米棒和催化剂颗粒。它也是表征生物材料和各种薄膜、改性表面、金属、合金、氧化物、半导体、聚合物和复合材料表面的重要工具。位于达雷斯伯里实验室的国家电子能谱和表面分析中心（NCESS）为EPSRC用户提供了世界一流的X射线光电子能谱仪-Scienta ESCA 300。该提案寻求为该设施自2007年4月起的4年运行以及为ESCA 300光谱仪在若干重要方面的进一步翻新和开发提供资金。拟议的计划将维持一个高性能的光电子能谱设备，这在世界舞台上是完全独一无二的，这对多样化和蓬勃发展的用户社区的研究计划至关重要。（hv = 1486.6 eV）x-NCESS ESCA 300的X射线源与其高透射半球形分析器和多通道探测器相结合，确保它是低能XPS的极好仪器。此外，其高能Cr K β（hv =5946.7 eV）和Cu K α（hv = 8047.8 eV）x射线源与半球形分析仪的高动能范围相结合，为材料的高能XPS提供了独特的能力。NCESS用户社区以研究建议的形式对这一建议给予了压倒性的支持，这些建议将在2007年4月起的4年内使用该设施。大多数用户群体特别需要NCESS ESCA 300的高性能和独特特性，如果没有光谱仪，他们的研究将是不可能的。对于少数用户群体来说，它是他们唯一可以访问的XPS光谱仪，公开透明的存取安排，加上仪器的可靠性和工作人员的专门科学支持，对他们的研究取得成功至关重要。为支持这一建议而收到的用户研究捐款表明，每年总共需要290至320天的存取该设施将承诺每年提供160天。从2007年4月起，将至少有5个EPSRC赠款到位，总价值超过150万美元，特别需要访问NCESS。NCESS的持续资助将确保EPSRC能够履行其对这些和其他赠款持有人的承诺，同时吸引越来越多样化的英国和国际用户社区。随着达雷斯伯里SRS在2008年12月的关闭，以及直到2011年DIAMOND上没有软X射线光电发射光束线，NCESS将成为未来几年内唯一能够进行软X射线电子能谱的英国国家设施。此外，在可预见的未来，NCESS将是唯一的英国设施，也是仅有的几个能够进行高能XPS的国际设施之一，即能够使用hv > 5000 eV的光子。这些因素加在一起，预计对使用设施的需求会很大，而且会不断增加。