The development of portable sensors for rapid, on-site and cost-effective detection of a broad range of targets has long been sought, because such sensors have the potential to revolutionize scientific research, environmental monitoring and personal healthcare in urban areas in developed countries as well as rural areas in developing countries.
Despite their Simple,fast and highly sensitive detection of certain DNA sequences has become increasingly important in the field of drug development, clinical diagnosis and environmental science.
Much effort has been made to develop sensitive and selective DNA assay. Among them, traditional techniques, including fluorescence, colorimetry, electrochemistry, surface enhanced Raman scattering (SERS), surface plasmon and light scattering and force, are employed