Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province;
School of Chemistry and Chemical Engineering;
Shaanxi Normal University;
Xi'an 710062;
China;
Department of Applied Chemistry;
School of Science;
Xi'an Jiaotong University;
Xi'an 710049;
China;
Serotonin; Gold; nanoflowers; Overoxidized; polypyrrole; Carbon; fiber; microelectrode; Electroless; deposition;