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Biosensors Based on Nanomaterials and Nanodevices
book

Biosensors Based on Nanomaterials and Nanodevices

by Jun Li, Nianqiang Wu
December 2017
Intermediate to advanced content levelIntermediate to advanced
517 pages
21h 5m
English
CRC Press
Content preview from Biosensors Based on Nanomaterials and Nanodevices
11
2
Synthesis and Characterization of Quantum Dots
Haiguang Zhao and Dongling Ma
2.1 Introduction
Semiconductor quantum dots (QDs) are uorescent nanocrystals (NCs) normally smaller
than 20 nm in diameter [1]. Typically, they are composed of an inorganic core, made up of a
few hundred to a few thousand atoms, surrounded by an organic outer layer of surfactant
molecules (ligands). Bulk semiconductors are characterized by a composition-dependent
bandgap (Figure 2.1a), which is the minimum energy required to excite an electron from
the valence band into the conduction band. With the absorption of a photon of energy
greater than the bandgap energy
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Publisher Resources

ISBN: 9781466551527