WEARABLE ELECTROCHEMICAL BIOSENSOR FABRICATION WITH PCB SOLDERMASK PHOTORESIST AS DIELECTRIC AND HIDROFOBIC MATERIAL THROUGH STENCIL METHOD

• Main Author: Anindita Koeswirjatno, Nadhira
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68856
• Institution: Institut Teknologi Bandung

Electrochemical biosensors are devices that can detect biological components and convert them into signals. This type of biosensor commonly used commercially because it has many advantages such as ease of use, cost effectiveness, good stability and very high development potential. One form of development of electrochemical biosensors is a wearable biosensor that performs detection with an emphasis on non-invasive aspects. Various studies have shown that to create this wearable biosensor requires various aspects such as a fast fabrication process, integration of material functions, as well as an additional system to accommodate the sample volume. In this study, the manufacture of wearable electrochemical biosensors using cotton fabric substrates was carried out by considering the physical and chemical properties of cotton fabrics that are suitable and non-invasive for the body. The fabrication of this wearable electrochemical biosensor uses the stencil method with a relatively easy method to do in order to be mass-produced. Wearable electrochemical biosensors work with a three-electrode system using Ag/AgCl paste and carbon, with a protective layer of PCB soldermask photoresist material. Fabricated wearable electrochemical biosensors are then tested with various stages such as physical testing in the form of electrode and insulation resistance value tests and reference electrode stability, as well as electrochemical testing using the Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV) methods, as well as other types of tests such as scan rate variations and sensor conductivity performance Optimization of optimal wearable biosensor fabrication methods is one of the focuses in this study. In addition, in wearable biosensors, the ability of soldermask PCB photoresist paste as a dielectric material is also tested and provides results according to insulation standards. CV and DPV methods are used as sensor performance testers by using linear range and sensitivity as sensor performance quality parameters