Starch-Assisted Synthesis of Bi2S3Nanoparticles for Enhanced Dielectric and Antibacterial Applications

Imran Uddin, Shaik M. Abzal, Kurapati Kalyan, Sailakshmi Janga, Ashutosh Rath, Rajkumar Patel, Deepak K. Gupta, T. R. Ravindran, Hira Ateeq, Mohd Sajid Khan, Jatis K. Dash

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Starch [(C6H10O5)n]-stabilized bismuth sulfide (Bi2S3) nanoparticles (NPs) were synthesized in a single-pot reaction using bismuth nitrate pentahydrate (Bi(NO3)3·5H2O) and sodium sulfide (Na2S) as precursors. Bi2S3NPs were stable over time and a wide band gap of 2.86 eV was observed. The capping of starch on the Bi2S3NPs prevents them from agglomeration and provides regular uniform shapes. The synthesized Bi2S3NPs were quasispherical, and the measured average particle size was ∼11 nm. The NPs are crystalline with an orthorhombic structure as determined by powder X-ray diffraction and transmission electron microscopy. The existence and interaction of starch on the NP's surface were analyzed using circular dichroism. Impedance spectroscopy was used to measure the electronic behavior of Bi2S3NPs at various temperatures and frequencies. The dielectric measurements on the NPs show high dielectric polarizations. Furthermore, it was observed that the synthesized Bi2S3NPs inhibited bacterial strains (Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus) and demonstrated substantial antibacterial activity.

Original languageEnglish
Pages (from-to)42438-42445
Number of pages8
JournalACS Omega
Issue number46
Publication statusPublished - 2022 Nov 22

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All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering


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