TY - JOUR
T1 - Electrochemical Characterization of Thin Film/Nanodots Electrodes of Silver and Gold for Biosensing CCRF-CEM Leukemia Cells
AU - Farahdina, Ulya
AU - Firdhaus, Miftakhul
AU - Wulandari, Putri
AU - Rubiyanto, Agus
AU - Nasori, Nasori
AU - Aziz, Ihwanul
AU - Suprihatin, Hari
AU - Jadid, Nurul
AU - Ula, Rini Khamimatul
N1 - Publisher Copyright:
© 2024 King Mongkut's University of Technology North Bangkok. All Rights Reserved.
PY - 2025
Y1 - 2025
N2 - This study presents a novel biosensor for detecting CCRF-CEM cells, derived from a T lymphoblastoid cell line, featuring intricate surface modification techniques. The fabrication process involves thin film deposition, electropolishing and dual anodization to create an anodic aluminum oxide template, followed by DC sputtering deposition to produce gold (Au) thin film/silver (Ag) nanodots and an Ag thin film/Au nanodots electrodes. Characterization using scanning electron microscopes (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) confirms electrode suitability for biosensing applications. Surface modification with aptamer Sgc8c and bovine serum albumin enables specific binding of CCRF-CEM cells while minimizing non-specific interactions. Electrochemical characterization via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) reveals the biosensor's sensitivity, selectivity, and reproducibility. The Au thin film/Ag nanodots electrode emerges as the most promising choice, exhibiting exceptional sensitivity (limit of detection (LOD) = 16 cell/10 mL), reproducibility, and selectivity for CCRF-CEM cells. This work highlights the importance of tailored surface development in biosensor design and lays the groundwork for highly sensitive and selective biosensors with potential applications in disease diagnosis and therapeutic monitoring.
AB - This study presents a novel biosensor for detecting CCRF-CEM cells, derived from a T lymphoblastoid cell line, featuring intricate surface modification techniques. The fabrication process involves thin film deposition, electropolishing and dual anodization to create an anodic aluminum oxide template, followed by DC sputtering deposition to produce gold (Au) thin film/silver (Ag) nanodots and an Ag thin film/Au nanodots electrodes. Characterization using scanning electron microscopes (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) confirms electrode suitability for biosensing applications. Surface modification with aptamer Sgc8c and bovine serum albumin enables specific binding of CCRF-CEM cells while minimizing non-specific interactions. Electrochemical characterization via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) reveals the biosensor's sensitivity, selectivity, and reproducibility. The Au thin film/Ag nanodots electrode emerges as the most promising choice, exhibiting exceptional sensitivity (limit of detection (LOD) = 16 cell/10 mL), reproducibility, and selectivity for CCRF-CEM cells. This work highlights the importance of tailored surface development in biosensor design and lays the groundwork for highly sensitive and selective biosensors with potential applications in disease diagnosis and therapeutic monitoring.
KW - Biosensor
KW - CCRF-CEM
KW - Electrochemical characterization
KW - Fabrication
KW - Thin film/nanodots electrode
UR - http://www.scopus.com/inward/record.url?scp=85214191435&partnerID=8YFLogxK
U2 - 10.14416/j.asep.2024.09.003
DO - 10.14416/j.asep.2024.09.003
M3 - Article
AN - SCOPUS:85214191435
SN - 2672-9156
VL - 18
JO - Applied Science and Engineering Progress
JF - Applied Science and Engineering Progress
IS - 1
M1 - 7529
ER -