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All Journal Jurnal Konversi Energi dan Manufaktur Jurnal Nasional Teknik Elektro dan Teknologi Informasi
Budiyanto
Universitas Muhammadiyah Jakarta
Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Transistor Efek Medan Berbasis Semikonduktor Organik Pentacene untuk Sensor Kelembaban Fadliondi; Budiyanto
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 6 No 2: Mei 2017
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1587.8 KB)

Abstract

The purpose of this paper is to fabricate a humidity sensor from organic semiconductor and to understand the effect of the transistor`s structure on the sensitivity of humidity sensor. Organic MOSFETs were fabricated using organic semiconductor called pentacene. The structures were bottom-contact and top-contact. The bottom-contact pentacene MOSFET was more sensitive to humidity than the top-contact pentacene MOSFET was. When the relative humidity increased from 20 % to 70 %, for VGS = VDS = -5 V, the magnitude of drain source current of the MOSFET decreased from 0.45 µA to 0.1 µA for bottom-contact pentacene MOSFET and from 3.6 µA to 3 µA for top-contact pentacene MOSFET. As the relative humidity increased from 20 % to 70 %, for VGS = 2 V and VDS = -5 V, the magnitude of drain source current of the MOSFET increased from 0.77 nA to 3 nA for bottom-contact pentacene MOSFET and from 0.6 nA to 1.4 nA for top-contact pentacene MOSFET. As the relative humidity increased from 20 % to 70 %, the threshold voltage shifted toward positive direction, from 0.5 V to 2 V for bottom-contact pentacene MOSFET and from 1 V to 2 V for top-contact pentacene MOSFET. The result showed that the pentacene MOSFET with bottom-contact structure was more suitable for humidity sensor than that with top-contact structure.
Effect of Electrolyte pH Level on the Surface Uniformity of Zinc Electroplating Coatings on AISI 1020 and 1070 Steels Bimo Tauhid Ibrahim Ibrahim; Sulis Yulianto; Windarta; Nurul Hidayati Fithriyah; Budiyanto
Jurnal Konversi Energi dan Manufaktur Vol. 11 No. 2 (2026)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.11.2.1

Abstract

Metal is one of the most frequently found materials in daily life and carbon steel is the most repeatedly used one. Carbon steel is a material that has the main elements in the form of iron and carbon, as well as supporting elements in the form of silicon, phosphorus, sulfur, and manganese. This study will compare the performance of zinc coating on high carbon steel (AISI 1070) and low carbon steel (AISI 1020), which research variables are electrolyte pH and coating quality testing with the corrosion rate method. It concluded that the reduction in the mass of the control specimen (which was not coated with Zn) was 2.83 g for AISI 1070 and for AISI 1020 was 2.69 g. The pH level in the electrolyte did not have a significant effect on the coating process, as evidenced by the Gr1P1S1 specimen (20 minutes, 40°C, pH 4) having an average thickness of 42.8 µm and Gr2P2S1 (20 minutes, 40°C, pH 3) having an average thickness of 43 µm. The electrolyte temperature and process time had a significant effect on the process. The lower the carbon content in carbon steel as a workpiece, the more difficult it would be to accept atoms from the anode/coating metal, as evidenced by the average increase in the mass of high carbon specimens of 0.70556 g compared to low carbon of 0.85333 g. In the test results using the average corrosion rate method, AISI 1070 showed a greater reduction in mass with an average figure of -0.1933 g compared to AISI 1020 at -0.098 g.
Co-Authors Bimo Tauhid Ibrahim Ibrahim Fadliondi Nurul Hidayati Fithriyah Sulis Yulianto Windarta