Fon, W. Chung and Schwab, Keith C. and Worlock, John M. and Roukes, Michael L. (2005) Nanoscale, Phonon-Coupled Calorimetry with Sub-Attojoule/Kelvin Resolution. Nano Letters, 5 (10). pp. 1968-1971. ISSN 1530-6984 http://resolver.caltech.edu/CaltechAUTHORS:20090911-092252240
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We have developed an ultrasensitive nanoscale calorimeter that enables heat capacity measurements upon minute, externally affixed (phonon-coupled) samples at low temperatures. For a 5 s measurement at 2 K, we demonstrate an unprecedented resolution of ΔC ~ 0.5 aJ/K (~36 000 k_B). This sensitivity is sufficient to enable heat capacity measurements upon zeptomole-scale samples or upon adsorbates with sub-monolayer coverage across the minute cross sections of these devices. We describe the fabrication and operation of these devices and demonstrate their sensitivity by measuring an adsorbed ^4He film with optimum resolution of ~3 × 10^(-5) monolayers upon an active surface area of only ~1.2 × 10^(-9) m^2.
|Additional Information:||Copyright © 2005 American Chemical Society. Received July 14, 2005; Revised Manuscript Received August 5, 2005. Publication Date (Web): September 7, 2005. We gratefully acknowledge support for this work from the NSF through Grant DMR-0102886.|
|Official Citation:||Nanoscale, Phonon-Coupled Calorimetry with Sub-Attojoule/Kelvin Resolution W. Chung Fon,, Keith. C. Schwab,, John M. Worlock,, and, Michael L. Roukes, Nano Letters 2005 5 (10), 1968-1971|
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|Deposited By:||George Porter|
|Deposited On:||07 Oct 2009 21:17|
|Last Modified:||26 Dec 2012 11:21|
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