PMID- 20583818
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20101201
LR  - 20100810
IS  - 1520-6882 (Electronic)
IS  - 0003-2700 (Linking)
VI  - 82
IP  - 15
DP  - 2010 Aug 1
TI  - Intermittent contact-scanning electrochemical microscopy (IC-SECM): a new 
      approach for tip positioning and simultaneous imaging of interfacial topography 
      and activity.
PG  - 6334-7
LID - 10.1021/ac101099e [doi]
AB  - A new scanning electrochemical microscopy (SECM) tip positioning method that 
      allows surface topography and activity to be resolved simultaneously and 
      independently is presented. The tip, controlled by a piezoelectric positioner 
      operated in closed loop, is oscillated normal to the substrate surface. Changes 
      in the oscillation amplitude, caused by the intermittent contact (IC) of the tip 
      with the substrate surface, are used as a feedback signal to control the tip 
      height. The method is illustrated with amperometric feedback approach curve 
      measurements to inert (insulating) and active (conducting) substrates using 12.5 
      and 1 microm radii Pt disk electrodes. Imaging of gold bands on a glass substrate 
      demonstrates the capabilities for simultaneous topography and activity mapping. 
      The prospect for using IC methodology more widely with other types of tips is 
      highlighted briefly.
FAU - McKelvey, Kim
AU  - McKelvey K
AD  - Department of Chemistry and MOAC Doctoral Training Centre, University of Warwick, 
      Coventry, UK CV4 7AL.
FAU - Edwards, Martin A
AU  - Edwards MA
FAU - Unwin, Patrick R
AU  - Unwin PR
LA  - eng
PT  - Letter
PL  - United States
TA  - Anal Chem
JT  - Analytical chemistry
JID - 0370536
EDAT- 2010/06/30 06:00
MHDA- 2010/06/30 06:01
CRDT- 2010/06/30 06:00
PHST- 2010/06/30 06:00 [entrez]
PHST- 2010/06/30 06:00 [pubmed]
PHST- 2010/06/30 06:01 [medline]
AID - 10.1021/ac101099e [doi]
PST - ppublish
SO  - Anal Chem. 2010 Aug 1;82(15):6334-7. doi: 10.1021/ac101099e.