Jump to main content
Jump to site search

Issue 37, 2018
Previous Article Next Article

Core–shell nanoparticles for gas phase detection based on silver nanospheres coated with a thin molecularly imprinted polymer adsorbed on a chemiresistor

Author affiliations

Abstract

We present a novel gas phase detection prototype based on assembling core–shell nanospheres made of a silver core and coated with a molecularly imprinted polymer (MIP) adsorbed onto an interdigitated array (IDA) electrode chemiresistor (CR). The core–shell nanospheres, AgNP@MIPs, were imprinted with linalool, a volatile terpene alcohol, as a model system. The thickness of the MIP layer was tuned to a few nanometers to enable the facile ingress and egress of the linalool, as well as to enhance the electrical transduction through the Ag core. The AgNP@MIPs were spread onto the IDA-CR modified with various positively charged polymers, by drop casting and dip-coating. The AgNP@MIPs were characterized by various techniques such as extra high-resolution scanning and tunnelling electron microscopy and X-ray diffraction. The MIP recognition event was transduced into a measurable increase in the resistance. The response to linalool exposure and removal was fast and the device was fully recovered and could be reused. Finally, the difference in the resistance change between imprinted and non-imprinted nanospheres was substantial.

Graphical abstract: Core–shell nanoparticles for gas phase detection based on silver nanospheres coated with a thin molecularly imprinted polymer adsorbed on a chemiresistor

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Feb 2018, accepted on 16 May 2018 and first published on 17 May 2018


Article type: Paper
DOI: 10.1039/C8NR01437J
Citation: Nanoscale, 2018,10, 17593-17602
  •   Request permissions

    Core–shell nanoparticles for gas phase detection based on silver nanospheres coated with a thin molecularly imprinted polymer adsorbed on a chemiresistor

    T. Shahar, G. Feldheim, S. Marx and D. Mandler, Nanoscale, 2018, 10, 17593
    DOI: 10.1039/C8NR01437J

Search articles by author

Spotlight

Advertisements