Preparation of STM (Scanning Tunneling Microscopy) Tips for In-Situ Characterization of Electrode Surfaces

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Abstract:

The total current between the tip and the sample in a scanning tunneling microscopy study of a solidliquid interface can be dominated by faradaic charge transfer currents. In such a situation feedback control of the tunneling gap, and imaging, is precluded. In this contribution we describe the preparation of glass or polymer coated STM tips that possess 100 A2 of exposed metal. These tips effectively discriminate against faradaic current and enable STM imaging in the presence of reversible electroactive solution species at appreciable tipsample biases. Electrochemistry, Tip preparation.

Author(s):
Heber, Michael J. ; Dovek, Moris M. ; Lewis, Nathan S. ; Penner, Reginald M. ; Quate, Calvin F.
Author Organization(s):
CALIFORNIA INST OF TECH PASADENA DEPT OF CHEMISTRY
Descriptive Note:
Technical rept. no. 2, Aug 1987-Sep 1988
Pagination:
0024

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-2
Contract/Grant Number(s):
N00014-85-K-0805
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_5_Command and Control
Modernization Areas:
Microelectronics
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*SCANNING, *TUNNELING, *SURFACES, *MICROSCOPY, INTERFACES, LIQUIDS, ELECTROCHEMISTRY, GLASS, SOLIDS, FEEDBACK, ELECTRODES, CHARGE TRANSFER, FARADAY EFFECT, EXPOSURE(GENERAL), PREPARATION, METALS, CURRENTS, CONTROL
Field(s)/Group(s):
Physical Chemistry, Test Facilities, Equipment and Methods
Keyword(s):
*SCANNING TUNNELING MICROSCOPY
Report Date:
1988 Oct 28