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All Journal Jurnal Sains dan Teknologi Natural B JFA (Jurnal Fisika dan Aplikasinya) JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Phenomenon : Jurnal Pendidikan MIPA Edu Sains: Jurnal Pendidikan Sains dan Matematika Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Jurnal Fisika FLUX Jurnal Sains Teknologi dan Lingkungan (JSTL) INKUIRI : Jurnal Pendidikan IPA JPF (Jurnal Pendidikan Fisika) Universitas Islam Negeri Alauddin Makassar Journal of Natural Science and Integration Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Indonesian Physical Review Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika
Lalu A. Didik
Universitas Islam Negeri Mataram
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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 1 
Effects of Polystyrene Solvent Difference on Morphology of Polystyrene Layers and Viscoelastic Properties of QCM Biosensors Susi Rahayu; Masruroh Masruroh; Djoko H Santjojo; Eka Rahmawati; Lalu A. Didik; Fadli Robiandi; Setyawan P Sakti
Natural B, Journal of Health and Environmental Sciences Vol 2, No 4 (2014)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (678.746 KB) | DOI: 10.21776/ub.natural-b.2014.002.04.8

Abstract

In this research, a modified QCM surface was done to improve the performance of QCM biosensors. This modification is done by coating polystyrene (Ps) on a QCM with toluena and chloroform solvents. The polystyrene coating was performed using spin coating technique, the measurement of surface roughness values using non-contact topography measurement system TMS 1200, and the viscoelastic properties was analyzed by using an electrical impedance. The analysis result using TMS 1200 shows morphologies of polystyrene produced with chloroform solvent have groovier and more porous compared to the toluena solvent. The roughness values of Ps surface with choroform and toluena is about 616.52 nm and 578.9 nm, respectively. The different surface roughness both of the solvent is caused by vapor pressure of each solvent. The vapor pressure value of chlorofrom solvent is 0.26 atm and toluena solvent of 0.037 atm. Moreover, using Sauerbrey equation is found mass of deposited ps produced with chloroform solvent is more than the toluena solvent. The mass of the polystyrene deposited on the surface of QCM with chloroform resulted about 2.23 × 10-5 ± 7.59 × 10-7 g and with toluena of 1.16 × 10-5 ±9.23 × 10-8 g.  Furthermore, viscoelastic test show both polystirene layer are still rigid and have approximately 12.23 Ω impedance value. Therefore, the different solvents affect the surface morphologies of Ps.
Effect of Xylene and Tetrahydrofuran Solvent Type on Polystyrene Layer Thickness With Spin Coating Method Eka Rahmawati; Fadli Robiandi; Lalu A Didik; Susi Rahayu; Djoko H Santjojo; Setyawan P Sakti; Masruroh Masruroh
Natural B, Journal of Health and Environmental Sciences Vol 2, No 4 (2014)
Publisher : Natural B, Journal of Health and Environmental Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (748.683 KB) | DOI: 10.21776/ub.natural-b.2014.002.04.9

Abstract

Surface modification of QCM by applying polystyrene (Ps) as a coating layer has been investigated. The PS layer was coated onto QCM sensor by using spin coating method. Polystyrene was dissolved in two different solvents i.e., xylene and Tetrahydrofuran (THF) with various concentration i,e 1%, 2%, 3%, 4%, 5% and the velocity angular of spin coater were 1500 rpm, 2000 rpm, 2500 rpm, 3000 rpm, 3500 rpm, dan 4000 rpm. The results show that different solvent result in the difference of thickness of polystyrene coating layer. By calculation with the Sauerbrey equation, the thickness of Ps layer using xylene solvent show 0.1 µm, 0.28 µm, 0.35 µm, 0.59 µm, and 0.81 µm. While by using THF, the thickness of each Ps layer are 0.15 µm, 0.43 µm, 0.84 µm, 0.97 µm, 1.28 µm. On the other hand, by applying different velocity of spin coater, the thickness of polystyrene with xylene are 0.486 µm, 0.445 µm, 0.432 µm, 0.350 µm, 0.320 µm, 0,290 µm, respectively. Moreover, the thickness of PS layer by using THF show 1.05 µm, 0.93 µm, 0.87 µm, 0.84 µm, 0.67 µm, 0.52 µm. Vapor pressure of each solvent is considered as the main property of solvent which influence the thickness of coating. The vapor pressure of THF (143 mmHg) is higher than the vapor pressure of xylene (72 mmHg), the thickness Ps layer with THF is thicker than that of by xylene solvents. 
Co-Authors Ahmad Zohdi Alwan Mahsul Asri, Laelatul Aulia, Fitratul Bahtiar Bahtiar Bahtiar, Bahtiar Baiq Nora Kusumawardani Djoko H Santjojo Eka Rahmawati Fadli Robiandi Farizal Wahyudi Fatimatuzzahra, Fatimatuzzahra Fitrah Ningsih Fitratul Aulia Fitrianingsih Fitrianingsih Hadi Kusuma Ningrat Hidayati, Nur Shofia Husnul Aini Irfan Safarwadi Masruroh Masruroh Masruroh MASRUROH Masruroh Masruroh Muh. Wahyudi Muhammad Kafrawi Muslimah Muslimah Nur'aini, Nur'aini Nuraini Saprianti Nurhidayati Nurhidayati Rianita Bela Islami Rosi Yulistia Wati Setyawan P Sakti Susi Rahayu Wahyudi, Farizal Wahyudi, Muh. Yahdi Yahdi, Yahdi Yahdi, Yahdi Yanita Syafitri