Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 519811
Title Metal-organic polyhedra-coated si nanowires for the sensitive detection of trace explosives
Author(s) Cao, Anping; Zhu, Wei; Shang, Jin; Klootwijk, Johan H.; Sudhölter, Ernst J.R.; Huskens, Jurriaan; Smet, Louis C.P.M. de
Source Nano Letters 17 (2017)1. - ISSN 1530-6984 - 7 p.
DOI https://doi.org/10.1021/acs.nanolett.6b02360
Department(s) Organic Chemistry
Publication type Refereed Article in a scientific journal
Publication year 2017
Keyword(s) Charge-transfer interaction - Explosives detection - Metal-organic polyhedra - Molecular recognition - Silicon nanowire-based field-effect transistor
Abstract

Surface-modified silicon nanowire-based field-effect transistors (SiNW-FETs) have proven to be a promising platform for molecular recognition in miniature sensors. In this work, we present a novel nanoFET/device for the sensitive and selective detection of explosives based on affinity layers of metal-organic polyhedra (MOPs). The judicious selection of the \ geometric and electronic characteristics of the assembly units (organic ligands and unsaturated metal site) embedded within the MOP cage allowed for the formation of multiple charge-transfer (CT) interactions to facilitate the selective explosive inclusion. Meanwhile, the host-stabilized CT complex inside the cage acted as an effective molecular gating element to strongly modulate the electrical conductance of the silicon nanowires. By grafting the MOP cages onto a SiNW-FET device, the resulting sensor showed a good electrical sensing capability to various explosives, especially 2,4,6-trinitrotoluene (TNT), with a detection limit below the nanomolar level. Importantly, coupling MOPs-which have tunable structures and properties- to SiNW-based devices may open up new avenues for a wide range of sensing applications, addressing various target analytes.

Comments
There are no comments yet. You can post the first one!
Post a comment
 
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.