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5 March 2019 Deoxyribonucleic acid-silver nanopowder-based composite for electromagnetic interference shielding (Conference Presentation)
James G. Grote, Michael M. Salour
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Proceedings Volume 10915, Organic Photonic Materials and Devices XXI; 109150C (2019) https://doi.org/10.1117/12.2515601
Event: SPIE OPTO, 2019, San Francisco, California, United States
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.
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James G. Grote and Michael M. Salour "Deoxyribonucleic acid-silver nanopowder-based composite for electromagnetic interference shielding (Conference Presentation)", Proc. SPIE 10915, Organic Photonic Materials and Devices XXI, 109150C (5 March 2019); https://doi.org/10.1117/12.2515601
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KEYWORDS
Composites
Electromagnetic coupling
Electromagnetic interference
Nanocomposites
Calibration
Silver
Nanoparticles
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