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Proceedings Paper

Deoxyribonucleic acid-silver nanopowder-based composite for electromagnetic interference shielding (Conference Presentation)
Author(s): James G. Grote; Michael M. Salour

Paper Abstract

Purified DNA was blended with hexadecyltrimethylammonium chloride (CTMA) in a 50/50 ratio to form DNA-CTMA. Next, 8 wt% silver (Ag) nanoparticles of ~1 micron diameter was blended with a 10/90 ratio of DNA-CTMA/butanol to form the nanocomposite solution. The solution was then cast in a Teflon dish to dry, forming an 80/20 Ag/DNA-CTMA nanocomposite thin film. The thickness of the samples measured 650 microns and were very flexible. EMI shielding effectiveness versus frequency measurements were then made using an Agilent E8362A performance network analyzer, calibrated for a frequency range of 8.2 GHz to 12.4 GHz using an Agilent X11644 mechanical calibration kit. Shielding effectiveness was found to be about -80 dB over the frequency range from 8 GHz to 12 GHz. Ag/DNA-CTMA nanocomposites have proven to provide excellent EMI shielding and are a promising alternative to existing EMI shielding materials. They have the potential to simply be painted on and Ag/DNA-CTMA EMI shielding requires no grounding.

Paper Details

Date Published: 5 March 2019
Proc. SPIE 10915, Organic Photonic Materials and Devices XXI, 109150C (5 March 2019); doi: 10.1117/12.2515601
Show Author Affiliations
James G. Grote, Software Defined Technologies, Inc. (United States)
Michael M. Salour, Software Defined Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 10915:
Organic Photonic Materials and Devices XXI
Christopher E. Tabor; François Kajzar; Toshikuni Kaino, Editor(s)

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