Details

Autor(en) / Beteiligte

• Ramya, K.
• Tiwari, Aditya
• Sidhartha, P. N.
• Kanungo, Sayan
• Chappanda, Karumbaiah N

Titel

2-D Tungsten Diselenide Nanoflakes for Selective Dopamine Sensing

Ist Teil von

• IEEE sensors journal, 2023-11, Vol.23 (21), p.25680-25688

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2023

Quelle

IEEE Xplore

Beschreibungen/Notizen

• A electrochemical biosensor based on a 2-D tungsten diselenide (WSe2) nanoflakes electrode was developed for highly selective detection of dopamine (DA). The DA sensors were fabricated by modifying carbon cloth (CC) with optimized loading of tungsten WSe2 nanoflakes. The material properties and sensor characterization were investigated by scanning electron microscopic, X-ray diffraction, X-ray photoelectron spectroscopy, ultraviolet-visible spectroscopy, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Mott-Schottky analysis. The sensor exhibited a large active working area with an average sensitivity of <inline-formula> <tex-math notation="LaTeX">1.6325\,\,\mu \text {A}\cdot \mu \text{M}^{-{1}} \cdot \text {cm}^{{2}} </tex-math></inline-formula> and a normalized sensitivity of <inline-formula> <tex-math notation="LaTeX">0.16\,\,\mu \text{M}^{-{1}} </tex-math></inline-formula> with a limit of detection (LoD) of 4 nM. The sensors were highly selective with respect to sucrose, L-cysteine, uric acid (UA), glucose, ascorbic acid (AA), and fructose.