Porphyrin single molecule wires for nanoelectronics
用于纳米电子学的卟啉单分子线
基本信息
- 批准号:EP/D076072/1
- 负责人:
- 金额:$ 41.67万
- 依托单位:
- 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:
- 关键词:
项目摘要
The prime aspiration of molecular nanoelectronics is to fabricate and interconnect molecules that can replace, or at least augment, present silicon based technology, with the molecules functioning as interconnects, switches, transistors or even logic gates. Clearly big challenges exist if such technologies are ever to reach fruition. In this respect, one of the key scientific challenges is to synthesise and reliably connect single molecular wires which can transport charge over long distance and also perform other functions such as rectifying current or storing charge. This proposal is aimed at synthesising extended molecular wires from a class of molecules called porphyrins, whose synthesis and functionalisation is the focus of the Oxford group. These electrical properties of these well-characterised molecules will be investigated at Cardiff and Liverpool, particularly their efficiency as molecular wires, their contacts with metal electrodes and their potential for electrochemical control in devices. The porphyrin wires to be synthesised are conjugated, stiff and contain sites where charge can be localised. Other key attributes include lengths greater than 10 nm, remarkable stability, their ability to bind a wide range of metal ions and their capacity to be tuned with electrochemistry or photochemistry. It is expected that their attributes will allow them to conduct electrons over long distances. Their redox activity and ability to support pendent molecular groups will in turn provide avenues for current rectification, switching or charge storage. The investigations of the electrical properties of these porphyrin wires will require us to wire-up single molecules. This is clearly a big experimental challenge but the Liverpool group has recently developed new techniques using the scanning tunnelling microscope which makes this procedure more straightforward and reliable. These techniques will provide robust chemical contact of the single porphyrin molecules at both ends to metallic contacts. The role of the molecule/metal contact remains one of the most poorly understood and yet extremely important aspects of single molecule electronics. We will systematically investigate these contact effects through the use of several differing chemical groups for binding to the metal electrodes and complementary determination of the lineup of energy levels between the metal and the molecule. Although most of the electrical characterisation will be performed with two metal contacts at either end of the wire, in the later stages of the project a scanning probe contact will be introduced which can be scanned along the length of the wire probing electrical properties along the wire. The final goals of the project are to produce a series of novel porphyrin molecular wires and to have defined and understood electron transport across them down to the single molecule level and in different environments including UHV and electrolyte. Being able to probe the key variables (temperature, environment, oxidation state, metal atom, molecule stiffness, contact chemistry) for one molecular system will provide a systematic approach for formulating detailed mechanisms. In particular, the limiting roles of contact chemistries and non-ideal charge transport (inelastic scattering) processes will be defined. The ideal porphyrin molecular wire would support high currents and we will assess how closely this goal (quantum conductance limit) can be approached. We will also have evaluated the ability of these molecules to act as active molecular wires through the placement of redox addressable groups along their length.
分子纳米电子学的主要愿望是制造和互连可以取代或至少增强现有硅基技术的分子,使分子充当互连、开关、晶体管甚至逻辑门。显然,如果此类技术要取得成果,就存在巨大的挑战。在这方面,关键的科学挑战之一是合成并可靠地连接单分子线,该线可以长距离传输电荷,并执行其他功能,例如整流电流或存储电荷。该提案旨在从一类称为卟啉的分子合成延伸的分子线,其合成和功能化是牛津小组的重点。卡迪夫和利物浦将研究这些经过充分表征的分子的电学特性,特别是它们作为分子线的效率、它们与金属电极的接触以及它们在设备中电化学控制的潜力。待合成的卟啉线是共轭的、坚硬的并且包含可以定位电荷的位点。其他关键属性包括长度大于 10 nm、卓越的稳定性、结合多种金属离子的能力以及通过电化学或光化学进行调节的能力。预计它们的属性将使它们能够长距离传导电子。它们的氧化还原活性和支持悬垂分子基团的能力反过来将为电流整流、开关或电荷存储提供途径。对这些卟啉线的电特性的研究将需要我们连接单个分子。这显然是一个巨大的实验挑战,但利物浦小组最近开发了使用扫描隧道显微镜的新技术,这使得该过程更加简单和可靠。这些技术将为两端的单个卟啉分子与金属接触提供牢固的化学接触。分子/金属接触的作用仍然是单分子电子学中最不为人所知但又极为重要的方面之一。我们将通过使用几种不同的化学基团与金属电极结合并互补确定金属和分子之间的能级排列来系统地研究这些接触效应。尽管大多数电气特性将通过导线两端的两个金属触点来执行,但在项目的后期阶段将引入扫描探针触点,该触点可以沿着导线的长度进行扫描,以探测沿着导线的电气特性。该项目的最终目标是生产一系列新型卟啉分子线,并定义和理解电子在它们之间的传输直至单分子水平以及在包括特高压和电解质在内的不同环境中的电子传输。能够探测一个分子系统的关键变量(温度、环境、氧化态、金属原子、分子刚度、接触化学)将为制定详细机制提供一种系统方法。特别是,将定义接触化学和非理想电荷传输(非弹性散射)过程的限制作用。理想的卟啉分子线将支持高电流,我们将评估可以在多大程度上实现这一目标(量子电导极限)。我们还将评估这些分子通过沿其长度放置氧化还原可寻址基团作为活性分子线的能力。
项目成果
期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Single molecule magnets on a gold surface: in situ electrospray deposition, x-ray absorption and photoemission.
金表面上的单分子磁体:原位电喷雾沉积、X 射线吸收和光电发射。
- DOI:http://dx.10.1088/0957-4484/22/7/075704
- 发表时间:2011
- 期刊:
- 影响因子:3.5
- 作者:Saywell A
- 通讯作者:Saywell A
Transition voltage spectroscopy of porphyrin molecular wires.
卟啉分子线的转变电压谱。
- DOI:10.1002/smll.201001046
- 发表时间:2010-11-22
- 期刊:
- 影响因子:13.3
- 作者:Neil Bennett;Gengzhao Xu;Louisa J. Esdaile;H. Anderson;J. E. MacDonald;M. Elliott
- 通讯作者:M. Elliott
Self-assembled aggregates formed by single-molecule magnets on a gold surface.
由单分子磁体在金表面形成的自组装聚集体。
- DOI:10.1038/ncomms1075
- 发表时间:2010-09-21
- 期刊:
- 影响因子:16.6
- 作者:A. Saywell;G. Magnano;C. Satterley;L. Perdigão;A. Britton;Nassiba Taleb;Maria del Carmen Gimenez;N. Champness;J. O'Shea;P. Beton
- 通讯作者:P. Beton
Single-molecule mapping of long-range electron transport for a cytochrome b(562) variant.
细胞色素 b(562) 变体的长程电子传递的单分子图谱。
- DOI:10.1021/nl103334q
- 发表时间:2011-01-12
- 期刊:
- 影响因子:10.8
- 作者:Eduardo Antonio Della Pia;Q. Chi;D. Dafydd Jones;J. Macdonald;J. Ulstrup;M. Elliott
- 通讯作者:M. Elliott
STM Study of Molecule Double-Rows in Mixed Self-Assembled Monolayers of Alkanethiols
烷硫醇混合自组装单层分子双排的 STM 研究
- DOI:http://dx.10.1021/la9044754
- 发表时间:2010
- 期刊:
- 影响因子:3.9
- 作者:Xu G
- 通讯作者:Xu G
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John Macdonald其他文献
Embracing Change
拥抱变革
- DOI:
10.2307/j.ctvcj2rgj.13 - 发表时间:
2019-04-01 - 期刊:
- 影响因子:0
- 作者:
John Macdonald;Charles Branas;Robert Stokes - 通讯作者:
Robert Stokes
Surgery for Recurrent Colon Cancer: Strategies for Identifying Resectable Recurrence and Success Rates after Resection
复发性结肠癌的手术:确定切除后复发率和成功率的策略
- DOI:
- 发表时间:
1998 - 期刊:
- 影响因子:39.2
- 作者:
R. Goldberg;Thomas Fleming;C. Tangen;Charles G. Moertel;John Macdonald;D. Haller;J. Laurie - 通讯作者:
J. Laurie
Cancer-derived mutation in the OGA stalk domain promotes cell malignancy through dysregulating PDLIM7 and p53
OGA 茎结构域中的癌症衍生突变通过 PDLIM7 和 p53 失调促进细胞恶性肿瘤
- DOI:
10.21203/rs.3.rs-2709128/v1 - 发表时间:
2023-03-20 - 期刊:
- 影响因子:0
- 作者:
Chia;Ao Wang;Dacheng Fan;Matthew Worth;Zhengwei Chen;Junfeng Huang;Jinshan Xie;John Macdonald - 通讯作者:
John Macdonald
The effects of vacant lot greening and the impact of land use and business presence on crime
空地绿化的影响以及土地利用和商业存在对犯罪的影响
- DOI:
- 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
Jesse Cui;S. Jensen;John Macdonald - 通讯作者:
John Macdonald
Mobilization of peripheral blood stem cells by subcutaneous injections of yeast‐derived granulocyte macrophage colony stimulating factor: A phase I‐II study
皮下注射酵母源粒细胞巨噬细胞集落刺激因子动员外周血干细胞:I-II 期研究
- DOI:
- 发表时间:
1993 - 期刊:
- 影响因子:5.2
- 作者:
K. Mangan;Mark Mullaney;T. Klumpp;S. Goldberg;John Macdonald - 通讯作者:
John Macdonald
John Macdonald的其他文献
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{{ truncateString('John Macdonald', 18)}}的其他基金
PREPARE: Enhancing PREParedness for East African Countries through Seismic Resilience Engineering
PREPARE:通过抗震工程加强东非国家的备灾能力
- 批准号:
EP/P028233/1 - 财政年份:2017
- 资助金额:
$ 41.67万 - 项目类别:
Research Grant
Optimising polymer photovoltaic devices through control of phase-separation
通过控制相分离优化聚合物光伏器件
- 批准号:
EP/F016255/1 - 财政年份:2008
- 资助金额:
$ 41.67万 - 项目类别:
Research Grant
Aeroelastic and Non-linear Structural Dynamic Interactions of Slender Structures
细长结构的气动弹性和非线性结构动态相互作用
- 批准号:
EP/D073944/1 - 财政年份:2006
- 资助金额:
$ 41.67万 - 项目类别:
Fellowship
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