EMI shielding and conductivity of carbon nanotube-polymer composites at terahertz frequency

被引：54
|
作者：
Polley, Debanjan [1 ,2 ]
Barman, Anjan [2 ]
Mitra, Rajib Kumar [1 ]
机构：
[1] SN Bose Natl Ctr Basic Sci, Dept Chem Biol & Macromol Sci, Unit Nano Sci & Technol, Kolkata 700098, India
[2] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Kolkata 700098, India
来源：
OPTICS LETTERS | 2014年 / 39卷 / 06期
关键词：
AC CONDUCTIVITY; THIN-FILMS; NETWORKS; REGION;
D O I：
10.1364/OL.39.001541
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the shielding effectiveness and complex conductivity of single-walled carbon nanotubes (SWNT) distributed in a polyvinyl alcohol (PVA) matrix in the THz frequency range. SWNTs are dispersed in PVA matrices with varying SWNT content (keeping the thickness of SWNT/PVA film constant) using a slow-drying method, and terahertz time-domain spectroscopy (THz-TDS) is performed at room temperature in transmission geometry in the frequency range of 0.3-2.1 THz. The transmittance spectra show a possible application of SWNT/PVA composites as low-bandpass filters in the THz frequency region. Shielding effectiveness of all the samples is measured, and, at a particular probing frequency, they tend to follow a linear relationship with SWNT weight fraction in the polymer matrices. THz conductivity of the composite system is described in the light of a. c. hopping conduction. (C) 2014 Optical Society of America
引用
收藏
页码：1541 / 1544
页数：4
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