McClelland, J.
, Strelcov, E.
and Chand, A.
(2025),
Signal size and resolution of scanning thermal microscopy in air and vacuum, Nature - Scientific Reports, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=959087
(Accessed April 3, 2025)
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Signal size and resolution of scanning thermal microscopy in air and vacuum
Published
Author(s)
, , Ami Chand
Abstract
We present measurements comparing scanning thermal microscopy in air and vacuum. Signal levels are compared and resolution is probed by scanning over the edge of a nanofabricated Ag square embedded in SiO2. Signals measured in air were seen to be 2.5 to 40 times larger than in vacuum. Furthermore, the air signals were stable while the vacuum signals varied significantly. Edge widths measured in air were approximately 39 % larger than those measured in vacuum. Our observations are consistent with the air measurements experiencing heat transfer from the surrounding sample via conduction and convection as well as the formation of a water meniscus at the tip-sample interface. These results contribute to the understanding of the complex heat exchange effects that can occur in scanning thermal microscopy when it is conducted in an ambient atmosphere.Citation
Nature - Scientific Reports
Volume
15
Issue
1
Pub Type
Journals
Download Paper
Keywords
SThM, scanning thermal miscocopy, thermal measurements, thermocoouple tip, air vs vacuum
Citation
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Created April 1, 2025