Complementary strand DNA 4 Fiber optic sensors 4 Gold 4 Metal Nanoparticles 4 Metal nanoparticles 4 Nanoparticles 4 chemistry 4 gold 4 metal nanoparticle 4 Alumina 2 Aluminum Oxide 2 Article 2 Biosensing Techniques 2 Confined nanoparticles 2 DNA probe 2 DNA sequence 2 DNA strand 2 DNA, Single-Stranded 2 Electrochemical Techniques 2 Electrochemical behaviors 2 Electrochemical response 2 Electrodes 2 Fluorescence 2 Fluorescence microscopy 2 Gold Nanoparticles 2 High resolution 2 Immobilized Nucleic Acids 2 Impedance based sensors 2 Microscopy, Fluorescence 2