Layered Nanoparticle Architectures on Surfaces for Sensing and Electronic Functions

摘要

Nanoparticle architectures on surfaces reveal unique sensoric and electronic functions. For instance, receptor-crosslinked Au-nanoparticles on electrodes act as sensing interfaces by the concentration of analytes in receptor sites. The 3D conductivity of the layered arrays enables the electrochemical detection of substrates, and the sensitivity of the system is controlled by the number of nanoparticle layers. Layered structures of DNA-functionalized CdS-nanoparticles allow the optical and photoelectrochemical detection of DNA. The fluorescence and photocurrents resulting from the systems are controlled by the number of aggregated nanoparticle layers. Finally, the electroless deposition of gold on avidin-Au-nanoparticle conjugates provides a means for the amplified microgravimetric detection of DNA.