Studi Awal Sintesis Dan Karakterisasi Tinta Konduktif Berbasis Grafit Pensil Untuk Aplikasi Sensor Suhu

Siti Aisyah; Romi Fadli Syahputra; Delovita Ginting

doi:10.17509/wafi.v10i2.89766

Authors

Siti Aisyah Departemen Fisika, Universitas Muhammadiyah Riau
Romi Fadli Syahputra Departemen Fisika, Universitas Muhammadiyah Riau
Delovita Ginting Departemen Fisika, Universitas Muhammadiyah Riau

DOI:

https://doi.org/10.17509/wafi.v10i2.89766

Keywords:

conductive ink, pencil graphite, PVA, NaCMC, temperature sensor

Abstract

This preliminary study aims to synthesize and characterize pencil graphite-based conductive ink for temperature sensor applications. The ink was prepared by adding Polyvinyl Alcohol (PVA) and Sodium Carboxymethyl Cellulose (NaCMC) polymers into graphite powder dispersed in deionized water, and then applied onto glossy paper with varied compositions. Characterization was carried out using Fourier Transform Infrared Spectroscopy (FTIR), Ultraviolet–Visible Spectroscopy (UV-Vis), sheet resistance measurements, and a Vector Network Analyzer (VNA). FTIR results indicated functional group interactions between graphite and the polymers, while UV-Vis analysis showed a decrease in the band gap to 2.02 eV in the GP3 sample. The sheet resistance test revealed that GP3 had the lowest resistance of 4.97 kΩ/cm² and the highest conductivity of 484.2 S/cm. VNA measurements confirmed that the sensor operated stably at specific frequencies and was responsive to temperature changes. Based on these results, pencil graphite-based conductive ink with PVA and NaCMC demonstrates potential for use as a flexible and low-cost temperature sensor candidate.

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