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NanoBiosensing pp 241-264 | Cite as

Biosensing with Nanoparticles as Electrogenerated Chemiluminsecence Emitters

  • Huangxian Ju
  • Xueji Zhang
  • Joseph Wang
Chapter
Part of the Biological and Medical Physics, Biomedical Engineering book series (BIOMEDICAL)

Abstract

Electrogenerated chemiluminescence (ECL), also known as electrochemiluminescence, is the luminescence generated by relaxation of exited-state molecules that are produced during an electrochemically initiated reaction [1]. The phenomenon of ECL has been known for a long time. Reports date back as far as 1927 for the light emission of Grignard compounds at applied potentials [2] and 1929 for the ECL of luminol [3]. Along with subsequent publications concentrated on the investigation of the mechanism and nature of ECL, especially of polyaromatic hydrocarbons (PAHs) and metal complexes [4–6], ECL has now become a very powerful analytical technique and been widely used in the areas of, for example, immunoassay, food and water testing, and biowarfare agent detection [7, 8]. As a method of producing light at an electrode, ECL represents a marriage between electrochemical and spectroscopic methods. This gives ECL many distinct advantages over other spectroscopy-based detection systems. For example, ECL do not involve a light source as fluorescence methods do; thus, the attendant problems of scattered light and luminescent impurities are absent without the presence of a background signal. Moreover, the specificity of the ECL reaction associated with the ECL label and the coreactant species decreases problems with side reactions, such as self-quenching.

Keywords

H2O2 Dopamine Tyrosine Hydrocarbon PAHs 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Nanjing UniversityNanjingP.R. China
  2. 2.World Precision Instruments, Inc.SarasotaUSA
  3. 3.University of Science & TechnologyBeijingP.R. China
  4. 4.University of CaliforniaSan DiegoUSA

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