Work

Effect of processing temperature on performance of screen-printed graphite electrodes

Year: 2025

Type: article

Abstract: Graphite thick films have been considered as an effective integrated working electrode in disposable electrochemical sensors for the on-site detection of pollutants in remote locations. The processing conditions of graphite thick films are not well documented, which hinders progress in their use. By combining profilometry, optical microscopy, X-ray powder diffraction, and Raman spectroscopy, we show that the structural development of graphite thick films strongly depends on the processing temperature. After thermal annealing of the screen-printed paste, the arrangement of the graphene layers improved and the organic components from the paste facilitated the fragmentation of the graphite grains. The resulting sheet resistance of the thick films decreases and contributes to a higher electron-transfer rate and thus to faster redox processes at the electrode surface. The elucidation of the relationship between processing and properties offers new opportunities to customise the properties of graphite thick films for a variety of applications requiring defect engineering. • Electrochemical response of screen-printed graphite films is tailored using the processing temperature. • Graphite undergoes fragmentation due to decomposition of the organic phase. • Graphene layers order above 650 °C. • Ordering of graphite films enhances the electrical conductivity and electrochemical response.

Source: Materials Chemistry and Physics

Authors: Barbara Repič, Kristian Radan, Gregor Marolt, Andreja Benčan Golob, Danjela Kuscer

Institutions: Jožef Stefan Institute, Jožef Stefan International Postgraduate School, University of Ljubljana

Language: English

Topic: Electrochemical sensors and biosensors

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,230

Funder: Javna Agencija za Raziskovalno Dejavnost RS

Awards: Multifunctional materials and devices: from quantum to macro-scale, Research and Development of Analytical Methods and Procedures, MIcrofluidic Sensor System for PESticides detection (MISS PES), High-pressure stabilization and phase transitions of elusive transition-metal fluorides, G8852479886