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Single molecule studies with a scanning tunneling microscope.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Single molecule studies with a scanning tunneling microscope./
作者:	Nazin, Georgy.
面頁冊數:	1 online resource (157 pages)
附註:	Source: Dissertations Abstracts International, Volume: 69-07, Section: B.
Contained By:	Dissertations Abstracts International69-07B.
標題:	Chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3282807click for full text (PQDT)
ISBN:	9780549256762

Single molecule studies with a scanning tunneling microscope.
Nazin, Georgy.

Single molecule studies with a scanning tunneling microscope. - 1 online resource (157 pages)

Source: Dissertations Abstracts International, Volume: 69-07, Section: B.

Thesis (Ph.D.)--University of California, Irvine, 2007.

Includes bibliographical references

A scanning tunneling microscope (STM) has been used to study various nanoscale atomic and molecular systems. The major thrusts of this work has been the study of novel nanoscale systems constructed in-situ with STM, and the study of electron transport through individual molecules or molecular systems weakly electronically coupled to the surface. All experiments were performed with a home-built STM in an ultra-high vacuum chamber at cryogenic temperatures. Scanning tunneling spectroscopy (STS) as well as dI/dV imaging, and STM photon emission spectroscopy were used to characterize the properties of these systems. Artificial nanostructures, each composed of a copper phthalocyanine (CuPc) molecule bonded to two Au atomic chains were assembled on a NiAl(110) surface by manipulation of individual Au atoms and CuPc molecules. The electronic densities of states were tuned by varying the number of Au atoms in the chains one by one. Photon emission from individual several-atom silver chains on the NiAl(110) surface was excited by tunneling electrons. The chains were assembled by manipulating single silver atoms with the STM. The photon spectra depended on the electronic structure of each chain, each electronic state inside the chain being associated with a distinct channel of emission. Electron transport through individual CuPc and magnesium porphine molecules adsorbed on a thin oxide film grown on the NiAl(110) surface was studied. Intensity of vibronic states in the STS spectra of the molecules depends on the relative electron tunneling rates through the two barriers of the junction. A simple, sequential tunneling model explains the observed trends. STS of Ag doping centers in a monolayer of C60 molecules supported on a thin Al2O3 film grown on the NiAl(110) surface was used to study vibronic states of these centers, as well as electronic states corresponding to their charging. The charging affects conduction through C60 molecules located around the doping centers. This effect is used to observe the electrostatic interaction of a pair of centers.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9780549256762Subjects--Topical Terms:

516420
Chemistry.
Subjects--Index Terms:

Copper phthalocyanineIndex Terms--Genre/Form:

542853
Electronic books.

Single molecule studies with a scanning tunneling microscope.
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520 $a A scanning tunneling microscope (STM) has been used to study various nanoscale atomic and molecular systems. The major thrusts of this work has been the study of novel nanoscale systems constructed in-situ with STM, and the study of electron transport through individual molecules or molecular systems weakly electronically coupled to the surface. All experiments were performed with a home-built STM in an ultra-high vacuum chamber at cryogenic temperatures. Scanning tunneling spectroscopy (STS) as well as dI/dV imaging, and STM photon emission spectroscopy were used to characterize the properties of these systems. Artificial nanostructures, each composed of a copper phthalocyanine (CuPc) molecule bonded to two Au atomic chains were assembled on a NiAl(110) surface by manipulation of individual Au atoms and CuPc molecules. The electronic densities of states were tuned by varying the number of Au atoms in the chains one by one. Photon emission from individual several-atom silver chains on the NiAl(110) surface was excited by tunneling electrons. The chains were assembled by manipulating single silver atoms with the STM. The photon spectra depended on the electronic structure of each chain, each electronic state inside the chain being associated with a distinct channel of emission. Electron transport through individual CuPc and magnesium porphine molecules adsorbed on a thin oxide film grown on the NiAl(110) surface was studied. Intensity of vibronic states in the STS spectra of the molecules depends on the relative electron tunneling rates through the two barriers of the junction. A simple, sequential tunneling model explains the observed trends. STS of Ag doping centers in a monolayer of C60 molecules supported on a thin Al2O3 film grown on the NiAl(110) surface was used to study vibronic states of these centers, as well as electronic states corresponding to their charging. The charging affects conduction through C60 molecules located around the doping centers. This effect is used to observe the electrostatic interaction of a pair of centers.
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