Advances in nano research

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Copper micro/nanostructures as effective SERS active substrates for pathogen detection

  • Ankamwar, Balaprasad (Bio-Inspired Materials Research Laboratory, Department of Chemistry, S.P. Pune University) ;
  • Sur, Ujjal Kumar (Bio-Inspired Materials Research Laboratory, Department of Chemistry, S.P. Pune University)
  • Received : 2019.09.09
  • Accepted : 2020.08.06
  • Published : 2020.08.25
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Abstract

Surface-Enhanced Raman Scattering (SERS) spectroscopy is a multifaceted surface sensitive methodology which exploits spectroscopy-based analysis for various applications. This technique is based on the massive amplification of Raman signals which were feeble previously in order to use them for appropriate identification at qualitative and quantitative in chemical as well as biological systems. This novel powerful technique can be utilized to identify pathogens such as bacteria and viruses. As far as SERS is concerned, one of the most studied problems has been functionalization of SERS active substrate. Metal colloids and nanostructures or microstructures synthesized using noble metals such as Au, Ag and Cu are considered to be SERS active. Silver and gold are extensively used as SERS active substrates due to chemical inertness and stability in air compare to copper. However, use of Cu as a suitable alternative has been taken into account as it is cheap. Herein, we have synthesized air-stable copper microstructures/nanostructures by chemical, electrochemical and microwave-assisted methods. In this paper, we have also discussed the use of as synthesized copper micro/nanostructures as inexpensive yet effective SERS active substrates for the fast identification of micro-organisms like Staphylococcus aureus and Escherichia coli.

Keywords

Acknowledgement

BA would like to thank the Board of College and University Development (BCUD) (BCUD, Finance/2016-17/1596, dated 08/11/2016), University of Pune for provision of financial support BA also extends special gratitude to UGC-DAE CSR (University Grants Commission-Department of Atomic Energy Consortium for Scientific Research), Bhabha Atomic Research Centre, Mumbai, India (Grant No. UDCSR/MUM/AO/CRS-M-248/2017/1169, Dt. March 14, 2017) for Major Research Project. UKS would like to thank Indian National Science Academy (INSA), New Delhi, India for INSA Visiting Scientist Fellowship (SP/VF-9/2014-15/273/01 April, 2014) under the supervision of BA at Bio-Inspired Materials Research Laboratory, Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind, Pune-411007, India. UKS would like to acknowledge financial support from the projects funded by the DHESTBT, Government of West Bengal (memo no. 161(sanc)/ST/P/S&T/9G-50/2017 dated 8/2/2018).

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