A Caltech Library Service

Mechanisms of Single-Walled Carbon Nanotube Probe−Sample Multistability in Tapping Mode AFM Imaging

Solares, Santiago D. and Esplandiu, Maria J. and Goddard, William A., III and Collier, C. Patrick (2005) Mechanisms of Single-Walled Carbon Nanotube Probe−Sample Multistability in Tapping Mode AFM Imaging. Journal of Physical Chemistry B, 109 (23). pp. 11493-11500. ISSN 1520-6106. doi:10.1021/jp051363u.

[img] PDF - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


When using single-walled carbon nanotube (SWNT) probes to create AFM images of SWNT samples in tapping mode, elastic deformations of the probe and sample result in a decrease in the apparent width of the sample. Here we show that there are two major mechanisms for this effect, smooth gliding and snapping, and compare their dynamics to the case when a conventional silicon tip is used to image a bare silicon surface. Using atomistic and continuum simulations, we analyze in detail the shape of the tip−sample interaction potential for three model cases and show that in the absence of adhesion and friction forces, more than two discrete, physically meaningful solutions of the oscillation amplitude are possible when snapping occurs (in contrast to the existence of one attractive and one repulsive solution for conventional silicon AFM tips). We present experimental results indicating that a continuum of amplitude solutions is possible when using SWNT tips and explain this phenomenon with dynamic simulations that explicitly include tip−sample adhesion and friction forces. We also provide simulation results of SWNT tips imaging Si(111)−CH_3 surface step edges and Au nanocrystals, which indicate that SWNT probe multistability may be a general phenomenon, not limited to SWNT samples.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Solares, Santiago D.0000-0003-0895-8160
Esplandiu, Maria J.0000-0003-2079-0639
Goddard, William A., III0000-0003-0097-5716
Additional Information:© 2005 American Chemical Society. Received 15 March 2005. Published online 24 May 2005. Published in print 1 June 2005. S.D.S. and W.A.G. were supported by the Microelectronics Advanced Research Corporation (MARCO) and its Focus Center on Function Engineered Nano Architectonics (FENA). M.J.E. and C.P.C. were supported by Arrowhead Research.
Funding AgencyGrant Number
Microelectronics Advanced Research Corporation (MARCO)UNSPECIFIED
Center on Functional Engineered NanoArchitectonics (FENA)UNSPECIFIED
Arrowhead ResearchUNSPECIFIED
Issue or Number:23
Record Number:CaltechAUTHORS:20170606-103827773
Persistent URL:
Official Citation:Mechanisms of Single-Walled Carbon Nanotube Probe−Sample Multistability in Tapping Mode AFM Imaging Santiago D. Solares, Maria J. Esplandiu, William A. Goddard, III, and C. Patrick Collier The Journal of Physical Chemistry B 2005 109 (23), 11493-11500 DOI: 10.1021/jp051363u
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77965
Deposited By: Ruth Sustaita
Deposited On:06 Jun 2017 18:07
Last Modified:15 Nov 2021 17:35

Repository Staff Only: item control page