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Assembly of Nanomaterials using Polymers and Biomaterials: Sensing and Electronic Applications

Published online by Cambridge University Press:  26 February 2011

Jaebeom Lee ,
Nicholas A Kotov  and
Alexander O Govorov
Jaebeom Lee
Affiliation:
jaebomle@umich.edu, University of Michigan, 1930 Lindsay Ln, Ann Arbor, MI, 48104, Ann Arbor, MI, 48104, United States
Nicholas A Kotov
Affiliation:
kotov@umich.edu, University of Michigan, Chemical Engineering, United States
Alexander O Govorov
Affiliation:
govorov@yahoo.com, Ohio University, Physics and Astronomy, United States
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Abstract

The hybrid assembly of inorganic nanomaterials upon chemical and biological bonding has occupied attentions to yield manifold optical and electromagnetic properties. Nanomaterials that can be virtually conjugated with any other nanomaterials by ligand-receptor / antigen-antibody reactions, polymer tethering, and DNA hybridization are of importance for fundamental comprehension of electronic process in nano-scale regime as well as for development of advanced sensing and imaging devices. Semiconducting nanoparticles(NPs)/ nanowires(NWs) like CdTe that have compatibly narrow range of strong photoluminescence (PL) with broad range of absorbance band stand in the spotlight of imaging and sensing materials. Optical effects in noble metallic NPs such as Au and Ag have been worth noticing due to localized surface plasmons. These optical modes lead to highly localized electromagnetic fields outside the particles that take advantage of the development of novel system such as surface enhanced Raman spectroscopy (SERS) and highly compacted optoelectronic devices and sensors. In particular, it is known that metallic NPs has stronger plasmon field than the surface of bulky metals, leading to potent interactions to adjacent materials in secured conjugated superstructures that induce non-linear optical properties. In this report, we review on a novel biological / polymeric inspired hybrid superstructures between semiconducting CdTe nanowires and Au or Ag nanoparticles. This superstructure demonstrates remarkable optical effects i.e., PL en-hancement of NWs, sensing application for temperature and solvents stemming from SERS-like collective interactions of NPs and NWs., and light harvest from Förster resonance energy tra-nsfer (FRET).

Keywords

nanostructureoptical propertieselectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 901: Symposium R – Assembly at the Nanoscale – Toward Functional Nanostructured Materials , 2005 , 0901-Ra22-54-Rb22-54
Copyright
Copyright © Materials Research Society 2006

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