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Volumn 301, Issue 5637, 2003, Pages 1221-1223

Measurement of single-molecule resistance by repeated formation of molecular junctions

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRIC CONDUCTANCE; ELECTROCHEMICAL ELECTRODES; GOLD;

EID: 0042322640     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1087481     Document Type: Article
Times cited : (2120)

References (32)
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    • note
    • 2 = 3: 1, v/v) and then thoroughly sonicated in 18-megohm water three times (using a Nanopure system fed with campus-distilled water). The substrate was a gold film evaporated on mica in an ultrahigh-vacuum chamber. The STM tip was made of 0.25-mm gold wire (99.999% purity).
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    • note
    • The average width of the molecules was about 0.9 nm for the lowest step (a single molecule) and was much shorter (∼0.3 nm) for higher steps. This width is not the length to which a molecule was stretched. Instead, it measures the distance over which a particular junction can be stretched before losing stability. At least part of the width comes from the stretching of the gold atoms in the contacts and from changes in the atomic configurations of the contacts as individual molecules break away.
  • 28
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    • note
    • We controlled the potential of the tip and the substrate with respect to a reference electrode (an Ag wire) in the aqueous 4,4′-bipyridine solutions by means of a Pt counter electrode and a bipotentiostat. We coated the tip with Apiezon wax in order to reduce ionic conduction and polarization currents below ∼1 pA.
  • 32
    • 0041705226 scopus 로고    scopus 로고
    • note
    • We thank S. Lindsay, O. Sankey, A. Nitzan, D. Ferry, L. Nagahara, G. Speyer, S. Boussaad, J: Li, and X. Xiao for discussions and the U.S. Department of Energy, NSF, and the U.S. Environmental Protection Agency for support.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.