Conductive quantum dot-encapsulated electrospun nanofibers from polystyrene and polystyrene-co-maleic anhydride copolymer blend as gas sensors

Rameshwar Tatavarty, Ee Taek Hwang, Jee Woong Park, Jun Hyuk Kwak, Jeong O. Lee, Man Bock Gu

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Electrospinning was employed to obtain uniformly distributed Cadmium Selenide (CdSe)/Zinc Sulfide (ZnS) core shell quantum dot (QD) encapsulated nanofibers in polymeric mixture of 4:1 ratio of polystyrene (PS) and polystyrene-co-maleic anhydride (PSMA). Fluorescence and scanning electron microscopy (SEM) measurements were used to evaluate the uniform size distribution and uniformity of PS-PSMA nanofibers with high aspect ratios. The introduction of QDs only into the PS-PSMA nanofibers induced electrical conductivity. They also showed a two to three fold increase in electrical conductivity in the presence of volatile organic compounds. The obtained quantum-dot nanofibers (Qd-NFs) were 600-650 nm thick, photostable for more than six months, and applicable for electrical conductance or gas-based sensing applications.

Original languageEnglish
Pages (from-to)104-108
Number of pages5
JournalReactive and Functional Polymers
Volume71
Issue number2
DOIs
Publication statusPublished - 2011 Feb

Keywords

  • Conductivity
  • Electrospun nanofibers
  • Gas sensor
  • Quantum dots

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Biochemistry
  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

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