메뉴 건너뛰기




Volumn 66, Issue 24, 2002, Pages 2414051-2414054

Probing correlated current and force effects of nanoparticle charge states by hybrid STM-AFM

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; ATOMIC FORCE MICROSCOPY; ELECTRIC POTENTIAL; FORCE; MEASUREMENT; MECHANICAL PROBE; NANOPARTICLE; PARTICLE SIZE; PHYSICAL MODEL; SCANNING TUNNELING MICROSCOPY;

EID: 0037116129     PISSN: 01631829     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article
Times cited : (13)

References (26)
  • 13
    • 0001900308 scopus 로고
    • edited by B.L. Altshuler, P.A. Lee, and R.A. Web (Elsevier, Amsterdam)
    • D.V. Averin and K.K. Likharev, in Mesoscopic Phenomena in Solids, edited by B.L. Altshuler, P.A. Lee, and R.A. Web (Elsevier, Amsterdam, 1991), p. 169.
    • (1991) Mesoscopic Phenomena in Solids , pp. 169
    • Averin, D.V.1    Likharev, K.K.2
  • 16
    • 33646603755 scopus 로고    scopus 로고
    • note
    • Tip-NP tunnel gaps are ∼2 nm in air due to a reduced work function compared to vacuum. Gap changes are significantly smaller. For example, in Figs. 1(c) and 1(d), the top of the cantilever deflects about 0.5 nm. The tip-NP gap changes by a smaller amount due to a "lever" effect that arises since the tip-NP gap is lower than the top of the cantilever. The reduced work function also mitigates a convolution effect inherent in the STM-AFM geometry where cantilever motion can give rise to strong current changes. Note that, in Figs. 1(c) and 1(d), a roughly linear cantilever motion does not give rise to strong asymmetry in current magnitudes with respect to plus/minus bias voltages.
  • 18
    • 0034668528 scopus 로고    scopus 로고
    • note
    • Given our current set point of ∼0.1 nA and a typical value for work functions (∼ 1 eV) under ambient conditions, we estimate the distance between tip and NP to be ∼2 nm. The cantilever's force constant k is estimated to be ∼ 1 N/m, larger than a factory value (∼0.2 N/m, thermomicroscope) because of the presence of a thin layer of water between tip and cantilever under ambient conditions. See T. Stifter, O. Marti, and B. Bhushan, Phys. Rev. B 62, 13 667 (2000). STM images of NP's were stable to repeated scanning, implying that the tip is not in direct contact with the NP's under these conditions.
  • 20
    • 33646603344 scopus 로고    scopus 로고
    • note
    • NP-T to reproduce non-linearity in current as in Refs. 17 and 19.
  • 25
    • 33646630550 scopus 로고    scopus 로고
    • note
    • 2+⋯], where r=a/2(a +d).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.