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The work proposes study of bacterial inhibition effects of E. coli bacteria using zinc sulfide (ZnS) nanoparticles and Cu-doped ZnS nanoparticles and design a mem-sensor. These ZnS nanoparticles are synthesized by aqueous precipitation method and Cu-doped ZnS nanoparticles are synthesized by wet chemical method. The obtained particles have been characterized by UV–visible spectroscopy (U.V), X-ray diffraction (XRD) and transmission electron microscopy (TEM). E. coli bacteria are conjugated to these nanosamples, and finally antibacterial effects are tested by nutrient broth method. The results show that up to 1 hour duration there arises no variation in absorbance, which is assumed to be the active period for bacterial sensing. It is observed that Cu-doped ZnS nanoparticle is more antibacterial as comparison to undoped ZnS nanoparticles. Therefore, here ZnS/PVA nanodevice is chosen as biosensor component for E. coli detection. Study is also going on Mem-behavior of the as-fabricated ZnS/PVA through electrical characterization. Experimental I-V curve supports Memristive behavior (hysteresis) of the bionanodevice which is to be used in E. coli sensor.

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Study on Bacterial Inhibition Effects of Undoped and Cu-Doped Zinc Sulfide Nanoparticles and Hence to Design a Memristive Sensor for E. Coli

  • 会议论文

  • 发表日期：

    2026年

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  • Himadri Duwarah,
  • Neelotpal Sharma,
  • Kandarpa Kumar Saikia,
  • Pranayee Datta

摘要

The work proposes study of bacterial inhibition effects of E. coli bacteria using zinc sulfide (ZnS) nanoparticles and Cu-doped ZnS nanoparticles and design a mem-sensor. These ZnS nanoparticles are synthesized by aqueous precipitation method and Cu-doped ZnS nanoparticles are synthesized by wet chemical method. The obtained particles have been characterized by UV–visible spectroscopy (U.V), X-ray diffraction (XRD) and transmission electron microscopy (TEM). E. coli bacteria are conjugated to these nanosamples, and finally antibacterial effects are tested by nutrient broth method. The results show that up to 1 hour duration there arises no variation in absorbance, which is assumed to be the active period for bacterial sensing. It is observed that Cu-doped ZnS nanoparticle is more antibacterial as comparison to undoped ZnS nanoparticles. Therefore, here ZnS/PVA nanodevice is chosen as biosensor component for E. coli detection. Study is also going on Mem-behavior of the as-fabricated ZnS/PVA through electrical characterization. Experimental I-V curve supports Memristive behavior (hysteresis) of the bionanodevice which is to be used in E. coli sensor.