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Excellent electromagnetic interference shielding effectiveness of chemically reduced graphitic oxide paper at 101 GHz*

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Abstract

Graphitic oxide (GO) was synthesized by oxidation of graphite powder using Hummer’s method and the formed GO is solution processed into paper-like macroscopic form. Subsequently, chemically reduced graphitic oxide paper (CRGOP) is prepared by hydrazine vapours induced reduction of formed GO precursor based paper. The formation of GO and its successful reduction to RGO phase is confirmed by FTIR, Raman Spectroscopy and X-ray diffraction. It has been observed that due to high electrical conductivity ~200 micron thick CRGOP display excellent EMI shielding performance at very high frequency of 101 GHz frequency with total shielding effectiveness (SE) value of −35.49 dB (i.e. >99.97% blocking of incident EM radiation) which is much higher compared to pristine GO paper (−1.55 dB) or comparable to expanded graphite (EG) sheet (−35.61 dB). Due to their lightweight nature, these freestanding CRGOPs display average specific SE value of −221.8 dB cm3/g. Besides, their excellent flexibility and makes them potential candidate for lightweight EMI gasketing material compared to other forms of flexible carbons like EG.

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Authors and Affiliations

  1. Conjugated Polymers and Graphene Technology Lab., Polymeric and Soft Materials Section, CSIR-National Physical Laboratory, 110012, New Delhi, India

    Parveen Saini, Sachin Kaushik, Rahul Sharma & Disha Chakravarty

  2. Academy of Scientific & Innovative Research (AcSIR), 110012, New Delhi, India

    Rahul Sharma

  3. Delhi Technological university (DTU), Bawana Road, 110042, New Delhi, India

    Rishi Raj

  4. Maharaja Surajmal Institute of Technology, Janakpuri, 110058, New Delhi, India

    Jyotirmay Sharma

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  1. Parveen Saini
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  2. Sachin Kaushik
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  4. Disha Chakravarty
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  5. Rishi Raj
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Correspondence to Parveen Saini.

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Saini, P., Kaushik, S., Sharma, R. et al. Excellent electromagnetic interference shielding effectiveness of chemically reduced graphitic oxide paper at 101 GHz*. Eur. Phys. J. B 89, 137 (2016). https://doi.org/10.1140/epjb/e2016-60624-7

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