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Scanning Tunneling Microscopy and Spectroscopy at variable Temperatures for the physical and chemical investigation of surface mounted supra-molecular assemblies.

English title Scanning Tunneling Microscopy and Spectroscopy at variable Temperatures for the physical and chemical investigation of surface mounted supra-molecular assemblies.
Applicant Jung Thomas
Number 121461
Funding scheme R'EQUIP
Research institution Mikro- und Nanotechnologie Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Condensed Matter Physics
Start/End 01.07.2008 - 30.09.2009
Approved amount 220'000.00
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All Disciplines (7)

Discipline
Condensed Matter Physics
Other disciplines of Physics
Inorganic Chemistry
Physical Chemistry
Material Sciences
Microelectronics. Optoelectronics
Organic Chemistry

Keywords (10)

Supra-Molecular Chemistry; Surface Science; Self Assembly; Scanning Tunneling Microscopy and Spectroscopy; Molecular Devices and Rotors; Scanning Probe Microscopy; Supramolecular Chemistry; Donor Acceptor Systems; Molecular Rotors; Molecular Devices

Lay Summary (English)

Lead
Lay summary
Addressable supra-molecular surface materials are of emerging importance due to the rapidly increasing knowledge in their rational assembly. While their architecture itself still remains a topic of research, mostly in the context of hierarchical assembly, some of the supra-molecular entities offer themselves for the investigation of their physical and chemical properties. Surface mounted supra-molecular assemblies and host-guest systems are at the core of this proposal which is structured in three parts: First, the research activity on supra-molecular self assemblies at surfaces is presented; second a specific, but highly relevant subtopic is presented in more detail: supra-molecular rotor stator systems and rotary switching devices; and third, an account of an emerging activity, the design and integration of supra-molecular donor acceptor systems is given together with the first results and publications.Overall the investment is the pre-requisite to a truly interdisciplinary endeavor and aims at the understanding, the design and the application of unprecedented, highly complex and novel material systems with configurable characteristics. This research will bring supra-molecular assemblies closer to bio-molecular functional bodies while their surface mounted and solvent-free architecture will allow for ‘random access’ by external scanning probes or other read-out devices.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Associated projects

Number Title Start Funding scheme
103679 Electronic States of Organic Semiconductors on Ultrathin Insulator Films 01.07.2005 Project funding (Div. I-III)
162512 Neue Einsichten in die Sonden-Proben-Wechselwirkung bei den Rastersondenmethoden 01.10.2015 Project funding (Div. I-III)
149713 Neue Einsichten in die Sonden-Proben-Wechselwirkung bei den Rastersondenmethoden 01.10.2013 Project funding (Div. I-III)
117610 Neue Einsichten in die Sonden-Proben-Wechselwirkung bei den Rastersondenmethoden 01.10.2007 Project funding (Div. I-III)
153549 On-Surface Magnetochemistry 01.04.2014 Project funding (Div. I-III)
113718 Induced magnetic ordering in molecular monolayers 01.02.2008 Project funding (Div. I-III)
132868 Controlling Spins in Molecular Adsorbates by a Chemical Switch 01.02.2011 Project funding (Div. I-III)

Abstract

Addressable supra-molecular surface materials are of emerging importance due to the rapidly increasing progress in their rational assembly. While their architecture itself still remains a topic of research, mostly in the context of hierarchical assembly, some of the supra-molecular entities offer themselves for the investigation of their physical and chemical properties. Surface mounted supra-molecular assemblies and host-guest systems are at the core of this proposal which is structured in three parts: First, the research activity on supra-molecular self assemblies at surfaces is presented; second a specific, but highly relevant subtopic is presented in more detail: supra-molecular rotor stator systems and rotary switching devices; and third, an account of an emerging activity, the design and integration of supra-molecular donor acceptor systems is given together with the first results and publications.This research calls for the comparative investigations of supra-molecular materials by non-local surface science investigations like low energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) and thermal desorption spectroscopy (TDS) in conjunction with scanning probe microscopy (STM and AFM) which represents a local investigation technique. In the current nanolab setup which is shared by a considerable number of students and projects (see publication list), the STM investigation possibilities are limited due to the homebuilt microscope which can be operated only at room temperature and thus, does neither allow for spectroscopic studies nor for optical access to the tunneling junction. Therefore, this proposal seeks co-financing of 1/3 of the investment from the R’Equip program of the Swiss National Science Foundation to combine a commercial high stability low temperature scanning tunneling microscope with the pre-existing surface science and growth system in the Nanolab (5 coupled vacuum chambers: 1 ESCA, 1 Transfer/LEED, 3 growth / evaporation / sputtering) in replacement of the current STM workhorse. The proposal is filed by three main users: one synthetic chemist and two surface scientists and scanning probe microscopy (STM and AFM) experts. The full spectrum of the envisaged activities goes far beyond what has been described in this proposal and is reflected in the list of international and national collaborations as well as in the publication list, attached and retrievable from the nanolab webpage. The current explosion of citations to some of the groups recent work may serve as further motivation: To allow to the consortium to keep their current leading position in this emerging field of research which is widely considered important for future technological solutions (see for example the Information Technology Roadmap for Semiconductors http://www.itrs.net/ ). Overall the investment is the pre-requisite to a truly interdisciplinary endeavor and aims at the understanding, the design and the application of unprecedented, highly complex and novel material systems with configurable characteristics. This research will bring supra-molecular assemblies closer to bio-molecular functional bodies while their surface mounted and solvent-free architecture will allow for ‘random access’ by external scanning probes or other read-out devices.
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