Publikationsdatum:
2006-01-21
Beschreibung:
Molecular electronics is often limited by the poorly defined nature of the contact between the molecules and the metal surface. We describe a method to wire molecules into gaps in single-walled carbon nanotubes (SWNTs). Precise oxidative cutting of a SWNT produces carboxylic acid-terminated electrodes separated by gaps of 〈/=10 nanometers. These point contacts react with molecules derivatized with amines to form molecular bridges held in place by amide linkages. These chemical contacts are robust and allow a wide variety of molecules to be tested electrically. In addition to testing molecular wires, we show how to install functionality in the molecular backbone that allows the conductance of the single-molecule bridges to switch with pH.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guo, Xuefeng -- Small, Joshua P -- Klare, Jennifer E -- Wang, Yiliang -- Purewal, Meninder S -- Tam, Iris W -- Hong, Byung Hee -- Caldwell, Robert -- Huang, Limin -- O'brien, Stephen -- Yan, Jiaming -- Breslow, Ronald -- Wind, Shalom J -- Hone, James -- Kim, Philip -- Nuckolls, Colin -- New York, N.Y. -- Science. 2006 Jan 20;311(5759):356-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, Columbia University, New York, NY 10027, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16424333" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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