Aging Of Nano-Morphology, Resistivity, And Far-Infrared Absorption In Gold-Black

Abstract

Gold black is a highly porous, extremely fragile, infrared-absorbing film used primarily as a coating for bolometers. Long term stability of its absorbance is a significant practical concern. This paper reports on the aging of morphological, electrical, and optical properties of gold black samples prepared with different initial porosities. An observed two-fold decrease in electrical resistance after 90 days at room-temperature is correlated with an increase in nano-crystalline grain size. Much larger resistance drops were observed after isothermal annealing at temperatures up to 100°C. Aging and annealing tended to improve the far-infrared absorption. Samples with the highest initial porosity have the fastest structural relaxation.

Publication Date

10-21-2015

Publication Title

Journal of Applied Physics

Volume

118

Issue

15

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1063/1.4933178

Socpus ID

84945244415 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84945244415

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