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31	System and Applications	ABS-47
Development of an All-sky Camera for Indonesian Sky Patrol Network Robiatul Muztaba (a*,b,d), Aditya Abdilah Yusuf (d), Adhitya Oktaviandra (d), Alka Budi Wahidin (b), Saiful Arifin (e), Hakim L. Malasan (c, d) a) Doctoral Program in Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha No.10, Bandung 40132, Indonesia b) Department of Atmospheric & Planetary Sciences, Faculty of Science, Institut Teknologi Sumatera, Lampung 35365, Indonesia c) Department of Astronomy, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia d) Observatorium Astronomy ITERA Lampung (OAIL), Institut Teknologi Sumatera, Lampung 35365, Indonesia e) Surabaya Astronomy Club (SAC) Abstract We developed the All-Sky Camera using a CMOS Sensor which is integrated with various other supporting devices to optimize image and video recordings. In general, CMOS cameras are not equipped with a cooling system which can cause increased noise. Therefore, our design is equipped with an external cooling system to keep the temperature stable at night or during the day. In addition, our designs are also equipped with various other sensors such as rain sensors, cloud sensors, light sensors, and sensors for environmental conditions such as pressure, temperature, and humidity. The development of the All-Sky Camera will also be used as a tool to monitor the sky throughout Indonesia with the Indonesian sky patrol network. As a result, we managed to record several astronomical phenomena, such as meteors and space debris. For future scientific needs, the All-Sky Camera that we have developed is also used to monitor changes in light pollution and identify sources of light pollution, as well as the quality of the atmosphere at the ITERA Lampung Astronomical Observatory Environment (OAIL). Keywords: All Sky Camera- Sky Patrol- CMOS- Sensor Share Link | Plain Format | Corresponding Author (Robiatul Muztaba)

32	Theory and Design	ABS-3
Absorption Spectroscopy and Dielectric Properties of Zinc Borate Glasses Modified by BaTiO3 Ceramics F. Khrongchaiyaphum(1),(2), N. Triamnak(3), R. Yimnirun(4), N. Wantana(1),(2), W. Chaiphaksa(1),(2), J. Kaewkhao(1),(2), and T. Sareein(5*) 1) Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, THAILAND 2) Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, THAILAND 3) Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom, 73000, THAILAND 4) School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, THAILAND 5) Division of Industrial Materials Science, Faculty of Science and Technology, Rajamangala University of Technology Phra Nakhon, Bangkok 10800, THAILAND *thanapong.s[at]rmutp.ac.th Abstract The effect of BaTiO3 concentration on borate glass were investigated, with various BaTiO3 content and different ZnO-B2O3 solution as the sintering aids by melting quenching technique. X-ray diffraction technique confirmed the formation of powder mixtures. The density of glass is increased with increasing the amount of BaTiO3 concentration, while molar volume and refractive index were slightly altered. Absorption spectra were measured, and optical band gap were determined. Absorption bands were not discovered in the visible light spectrum. The dielectric behavior which is also observed of BaTiO3-ZnO-B2O3 system were systematically investigated. The dielectric of BaTiO3 concentration on borate glass with good permittivity and low dielectric loss were obtained at high concentrations the amount of BaTiO3. Furthermore, radiation shielding properties were calculated and found better when increasing of BaTiO3. This developed glass could be used for transparency radiation shielding materials. Keywords: Transmission spectrum- relaxation- BaTiO3- lead-free Share Link | Plain Format | Corresponding Author (Thanapong Sareein)

33	Theory and Design	ABS-6
Judd-Ofelt analysis and FTIR of the gadolinium borosilicate glass doped with Dy3+ ions N. Intachai (a), N. Wantana (b,c), S. Kaewjaeng (a), S. Kothan (a*), H.J. Kim (d), and J. Kaewkhao (b,c)** a) Center of Radiation Research and Medical Imaging, Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand *suchart.kothan[at]cmu.ac.th b) Physics Program, Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand c) Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom, 73000, Thailand **jakrapong[at]webmail.npru.ac.th d) Department of Physics, Kyungpook National University, Daegu, 41566, South Korea Abstract The novel gadolinium borosilicate glasses doped with 1.0 mol% of Dy2O3 concentration in the formula of 40Na2O-12.5Gd2O3-5SiO2-(41.5)B2O3-1Dy2O3 was investigated Judd-Ofelt (J-O) and Fourier-transform infrared spectroscopy (FTIR). The J-O intensity characteristics are calculated from the integrated area under absorption and emission, as well as refractive index. Utilizing the J-O method, optical characteristics such as oscillator strengths, J-O parameter, radiative transition probability, the stimulated emission cross-section, and branching ratios are determined. FTIR method was utilized to determine the characteristic functional groups contained in the chemical structure of composites based on its matrix. Keywords: Judd-Ofelt- FTIR- Dysprosium- Borosilicate glass Share Link | Plain Format | Corresponding Author (Nuttawadee Intachai)

34	Theory and Design	ABS-8
Orange emission from Sm3+ doped soda lime borosilicate glass prepared from rice husk ash for photonic material application. N.Mahingsa(a,b*), K.Kirdsiri(a,b), N.Srisittipokakun(a,b), P.Meejitpaisan(a,b), J.Kaewkhao(a,b) a)Physics Program,Faculty of Science and Technology,Nakhon Pathom Rajabhat University,Nakhon Pathom 73000,Thailand b)Center of Excellence in Glass Technology and Materials Science (CEGM),Nakhon Pathom Rajabhat University,Nakhon Pathom 73000,Thailand *Nattaporn211998[at]gmail.com Abstract In this work, the physical, optical properties of Sm3+ doped glass made from rice husk ash (RHA) with different concentrations of Sm3+ ion were prepared. The glass samples with chemical composition of (60-x) SiO2: 30B2O3:10Na2O: 10CaO: xSm2O3 were prepared by melting-quenching process (use RHA as a SiO2) . Density and molar volume of the sample glass increase with increasing of Sm3+ concentration. The absorption spectra found peak absorbs in the UV-Vis-NIR region. Main emission peak was observed at 600 nm under excitation at 401 nm. The emission color of glasses were confirmed by CIE 1931 color coordinates and are in the orange region emission. The results show the potential of Sm3+ doped glass made form rice husk is useful in future photonics application. Keywords: Rice husk ash-glass-Samarium Share Link | Plain Format | Corresponding Author (Nattaporn Mahinhgsa)

35	Theory and Design	ABS-9
THE GHOST BUSINESS, PICKING THE VISUAL CREATIVITY PARADIGM IN HORROR MOVIE Hendy Yuliansyah, Acep Iwan Saidi Institut Teknologi Bandung Abstract The horror genre in national films is one sign of the progress of national cinema. Visualization of ghosts establishes boundaries, concepts, and paradigms that develop, in communicating the needs of society in social and commercial terms. The relationship between entertainment and the presence of a ghost figure packaged in commercial visuals has become a mandatory menu for horror films. The character of a ghost figure depicted with a face and several attributes such as clothes, long hair, sticks, and blood, becomes an identity that has a double meaning. Meeting the needs and interests of a dynamic society can be met through horror films. As a result, the development of the paradigm in the concept of horror has shifted both in understanding and engineering the presence of ghost figures by actualizing the boundaries of religion, sex, or comedy, towards a hybrid. An indication of the development of the concept of half ghost, and half human is the latest visual model of ghost figures, as the core problem of visual creativity in ghost figures. By using an interdisciplinary approach, the theory of Roland Barthe, and Gilles Deleuze, the object of research in the 1981 film ^Sundel Bolong^, ^Destroy the Science of Witchcraft^ (1989), ^Whisper of Satan^ (2018), and ^Makmum^ (2019), the findings can be stated great thinking that explains the detailed specifications of horror that impact on the dynamics of visual communication. Keywords: design, movie, ghost, horror, visual Share Link | Plain Format | Corresponding Author (Hendy Yuliansyah)

36	Theory and Design	ABS-11
An Evaluation of Online Media in The Covid Coverage Based on Smart Visual Design Vivi Varlina, Yasraf Amir Piliang, Ruly Darmawan, Tri Sulistyaningtyas Faculty of Arts and Design (FSRD), ITB Abstract In the last two decades, the scope of the Internet of things (IoT) has developed into a popular topic of research. One of the rapidly growing entities in this era is the dissemination of information through online media. Interestingly, most disciplines discuss technological devices and how systems work digitally. Not many explore IoT and online media in the subject of design. This study discusses that online media is no longer just presenting information, but it is very necessary to elaborate the IoT paradigm with smart visual design. The research focuses on an online media portal that specifically reports information about Covid. The purpose of this research is to explore how an online media can configure information of COVID through design elements. The research method used is semantic differential, which examines various psychological aspects that owned by audience when they see visual image about Covid, which is represented in signs. This article in a semantic perspective provides a synthesis that a number of information that collaborates in the IoT paradigm represent various meanings, are integrated, and form a particular algorithm. Specifically in design analysis, the IoT paradigm and visual elements will lead to its own discursive construction and have unique affordability. This model forms new knowledge that is useful for decision making or strategic policy formulation. Keywords: Internet of Things- Smart Visual Design- Semantic Differential- Visual Image - Covid Share Link | Plain Format | Corresponding Author (Vivi Varlina)

37	Theory and Design	ABS-18
MATLAB/Simulink Numerical Simulation of a Spacecraft With Reaction Wheels Having Static and Dynamic Imbalances Wahyu Wira Yudha (a), Riries Rulaningtyas (a), Akif Rahmatillah (a), Harry Septanto (b*) a) Department of Physics, Faculty of Mathematics and Natural Science, Universitas Airlangga, Surabaya, 60115, Indonesia b) Research Center for Smart Mechatronics, National Research and Innovation Agency (BRIN), Bandung, 40135, Indonesia. *harry.septanto[at]brin.go.id Abstract Using reaction wheels for attitude control purposes introduces jitter problems due to their static and dynamic imbalances. That is because we can not avoid imperfections in manufacturing. As a result, it is important to take this into account when designing an attitude control system that involves computational simulation of the system model. In simplified models of the reaction wheels with imbalances, the forces and torques that were originally brought on by the reaction wheels are viewed as external disturbances. However, it is not physically realistic. Instead, there is a model that was derived based on the first-principle approach called the fully coupled model that meets the angular momentum conservation, hence is physically realistic. The fully coupled model was implemented in Basilisk, or BSK for short. Nevertheless, those who are not familiar with this software framework may implement the fully coupled model in the software they are more accustomed to using, such as MATLAB/Simulink. In addition, the reference article that reported the fully coupled model contains sophisticated and interrelated mathematical equations that are all used for explanations of how they were generated rather than for simulation purposes. This paper addresses the implementation of the model on MATLAB/Simulink. This paper describes the equations used in the simulation and their purposes. The numerical simulation run confirms the simulation validation. Keywords: Spacecraft dynamics, Reaction wheel, Dynamic and static imbalances, Fully coupled model, Numerical simulation Share Link | Plain Format | Corresponding Author (Harry Septanto)

38	Theory and Design	ABS-20
Light Management Investigation of Transparent DSSC based on Ln3+ ion doped BaO-ZnF2-B2O3-TeO2 Glass (Ln3+ = Dy3+/Sm3+/Eu3+) as UV Down-conversion Material L Yuliantini, I Paramudhita, L M Pranoto, Shobih, J Hidayat, N M Nursam,J Kaewkhao, and M Djamal Research Centre for Electronics, National Research and Innovation Agency Republic of Indonesia (BRIN), 40135, Bandung, Indonesia Abstract For several decades, energy conversion from solar irradiance to electricity has been successfully conducted by solar cells device. However, not all solar wavelengths can be captured by solar cells. It is found the absorption limitation of band gap energy for all solar cell types in the ultraviolet region (high photon energy) and infrared region (low photon energy) leading to 70% energy loss. Introducing the material which can convert higher photon energy to the lower photon energy that is suitable with solar cell bandgap energy is one of the solutions for this problem. In the present work, we have prepared glass using the melt and quenching technique with the composition of 30BaO + 10 ZnF2 + 30 B2O3 + (30-x)TeO2 + xLn2O3 where xLn2O3 is 1 mol% of D2O3, 1 mol% of Sm2O3, and 1.5 mol% of Eu2O3. The absorption spectra of glass samples show several absorption bands in the ultraviolet to infrared region. Meanwhile, the emission spectra of glass samples confirm the agreement with DSSC absorption spectra in the visible region. Furthermore, we demonstrate the I-V measurement by placing glass samples on the top of the DSSC device for understanding the glass samples role. The DSSC parameters including efficiency, fill factor (FF), short-circuit current (ISC), and open-circuit voltage (VOC) are presented in detail. The I-V measurement validates the increasing DSSC efficiency indicating the enlargement of photon generation in the device. In summary, we can conclude that the present glass possesses high potential for a solar cell application, wherein Eu3+ ion doped glass is the most probable candidate for UV down-conversion material as one of light management technology of DSSC device. Keywords: Down-conversion, DSSC, fluoroborotellurite glass, I-V measurement, light management, ultraviolet. Share Link | Plain Format | Corresponding Author (Lia Yuliantini)

39	Theory and Design	ABS-21
A Design of The Third Generation of UIN Sunan Kalijaga^s UV Fluorescence Spectro-Imaging System Frida Agung Rakhmadi, Widayanti, Rochan Rifai Physics Department, Faculty of Science and Technology, UIN Sunan Kalijaga Yogyakarta Abstract Research on design of the third generation of UIN Sunan Kalijaga^s UV fluorescence spectro-imaging system was done. The purpose of this research was to make a design of the third generation of UIN Sunan Kalijaga^s UV fluorescence spectro-imaging system as a development of the second generation one. This research was conducted through two steps, making a block diagram dan a design of the system. The system block diagram was made using Microsoft Visio, while the design was made using Google SketchUp. The result showed that that a design of the third generation of UIN Sunan Kalijaga^s fluorescence spectro-imaging system was made succesfully using high power UV-LED of 350-360 nm and industrial camera module SONY IMX291. Keywords: camera, fluorescence, spectro-imaging, UV-LED Share Link | Plain Format | Corresponding Author (Frida Agung Rakhmadi)

40	Theory and Design	ABS-23
A Plasmonic Sensor Based Gold Nanoparticles for Detection of Chlorpyrifos Suratun Nafisah (a,b), Nur Farah Wahidah Fauzi (b), Nur Liyana Razali (b,c), Mitra Djamal (d), Marlia Morsin (b,c*) a) Departement of Electrical Engineering, Faculty of Industrial and Production Technology, Institut Teknologi Sumatera (ITERA), Lampung Selatan, 35365 Indonesia b) Department of Electronic Engineering, Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia c) Microelectronics & Nanotechnology - Shamsuddin Research Centre (MiNT-SRC), Institute of Integrated Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat Johor, Malaysia *marlia[at]uthm.edu.my d) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung - 40132, Indonesia Abstract Plasmonic sensor-based gold nanoparticles (GNPs) have been developed for detecting organophosphorus pesticides namely chlorpyrifos. Chlorpyrifos is the most common-used pesticide in agriculture (including soybeans, apples, broccoli, and corn) and non-agriculture like golf courses. The GNPs have been used as sensing materials in this sensor setup and were synthesized and deposited as a thin film using the seed-mediated growth method (SMGM). In this study, the sensitivity of the plasmonic sensor^s effect and response to two different mediums which are deionized (DI) water and chlorpyrifos as targeted analytes were successfully detected by recording the changes in peak positions and intensities for transverse Surface Plasmon Resonance (t-SPR) and longitudinal SPR (l-SPR). The change in response is due to changes in the refractive index of the surrounding medium, which are water (n = 1.33) and chlorpyrifos (n = 1.56). The SPR red-shifted to a longer wavelength as the refractive index of the surrounding medium increased as well as the concentration increased from 1 mg/mL to 10 mg/mL. Furthermore, the stability of GNPs in the presence of different analytes was tested for 600 seconds and it was found that the changes in peak intensity for both peaks were minimal. The response of the repeatability test is consistent over five testing cycles, as indicated by DI water and analyte intensities that almost completely recover to their previous levels after every cycle of medium change. Keywords: Chlorpyrifos- Gold nanoparticles (GNPs)- Plasmonic sensor Share Link | Plain Format | Corresponding Author (Suratun Nafisah)

41	Theory and Design	ABS-24
Designing of Optical Sensor using ZnO as Sensing Material for Pesticide Detection Natasya Salsabiila (a), Suratun Nafisah (a, b)*, Bambang Irawan (a), Lukman Nulhakim (b, c), Muhammad Reza Kahar Aziz (a), Marlia Morsin (d), Mitra Djamal (e) (a) Departement of Electrical Engineering, Faculty of Industrial and Production Technology, Institut Teknologi Sumatera (ITERA), Lampung Selatan, 35365 Indonesia (b) Research and Innovation Center for Advanced Materials, Institut Teknologi Sumatera (ITERA), Lampung Selatan, 35365 Indonesia (c) Departemen of Physics Engineering, Faculty of Industrial and Production Technology, Institut Teknologi Sumatera (ITERA), Lampung Selatan, 35365 Indonesia (d) Microelectronics & Nanotechnology - Shamsuddin Research Centre (MiNT-SRC), Institute of Integrated Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat Johor, Malaysia (e) Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, 40132 Indonesia *Corresponding author e-mail: suratun.nafisah[at]el.itera.ac.id Abstract Nowadays, the development of technology to detect pesticide, substances that is used to eradicate invasive plant in agriculture sector by inhibit their growth, still becomes a challenge. The most commonly used pesticide detection technology is chromatography, which has drawbacks such as expensive equipment, a long detection time, and the need for experts to analyze the test results. Hence, it is critical to develop pesticide detection technology alternatives that provide fast, accurate, low-cost, and simple detection methods. On the other side, optical sensor that utilize the optical phenomenon of metal oxide nanomaterial namely zinc oxide (ZnO) can be used to detect hazardous materials. In this study, an optical sensor using ZnO with nanorod shape as a sensing material has been developed for pesticide detection in solution form. This system consist of six components, i.e., light source, fiber optic, chamber, sensing material, spectrometer and computer equipped with AvaSoft software as a data analyzer. Experiments were carried out using pesticide type of diazinon as the target analyte, and deionized water (DIW) as a reference medium. The sensing parameter in this experiment is Absolute Optical Change (AOC) value. The presence of diazinon with a concentration range from 1 ppm to 10,000 ppm has been successfully detected using this sensor with a detection limit of 1 ppm. The result shows that the custom-made solution-based optical sensor system using ZnO as sensing material has the potential to be used as an alternative detection method for organophosphate pesticide. Keywords: Optical Sensor, Pesticide, Zinc Oxide (ZnO) Share Link | Plain Format | Corresponding Author (Natasya Salsabiila)

42	Theory and Design	ABS-31
Trimethylamine gas sensor based on quartz crystal microbalance-polyvinyl acetate nanofibers overlaid with maltodextrin Rizky Aflaha (a*), Laila Katriani (a), Ahmad Hasan Asari (b), Nur Laili Indah Sari (a), Aditya Rianjanu (c), Roto Roto (d), and Kuwat Triyana (a*) (a) Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO Box BLS 21, 55281 Yogyakarta, Indonesia. *rizkyaflaha[at]mail.ugm.ac.id *triyana[at]ugm.ac.id (b) Research Center for Advanced Materials, National Research and Innovation Agency, Building 440-442 Kawasan Puspiptek Serpong, 15314 Tangerang Selatan, Indonesia. (c) Department of Physics, Institut Teknologi Sumatera, Terusan Ryacudu, Way Hui, Jati Agung, Lampung, 35365, Indonesia. (d) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO Box BLS 21, 55281 Yogyakarta, Indonesia Abstract Trimethylamine (TMA) is a compound that occurs as a result of fish spoilage and can irritate human mucous membranes and eyes, hence it is important to monitor its levels in the air. In this study, a quartz crystal microbalance (QCM)-based sensor with polyvinyl acetate nanofibers overlaid with maltodextrin was proposed to detect TMA gas. The results of the scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR) are included to determine the morphology and chemical composition of the sensor layer. As a result, the sensor has a sensitivity of 0.508 Hz/ppm to TMA gas with a low limit of detection (LOD) of 15.8 ppm, an increase in sensitivity of 8.4 times greater than without maltodextrin. The hydrogen bond between the active group of maltodextrin and TMA gas molecules is believed to be the cause of the increased sensitivity. The sensor also has good reproducibility and reversibility. Furthermore, the sensor has fast response and recovery times of 141 s and 116 s, respectively. In addition, the sensor exhibited superior selectivity over other analytes, and the stability of the sensor during the 20 days of testing was remarkably excellent. Thus, the resulting sensor can be an alternative to the classic detection method for detecting TMA gas. Keywords: Maltodextrin, polyvinyl acetate, quartz crystal microbalance, trimethylamine Share Link | Plain Format | Corresponding Author (Rizky Aflaha)

43	Theory and Design	ABS-33
Characterization of Ammonia Sensor Based on Quart Crystal Microbalance Coated with Polyvinyl Acetate Modified by Chitosan Laila Katriani (a), Rizky Aflaha (a), Ahmad Hasan As^ari (b), Pekik Nurwantoro (a), Roto (c), Kuwat Triyana (a*) a) Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO Box BLS 21, 55281 Yogyakarta, Indonesia. *triyana[at]ugm.ac.id b) Research Center for Advanced Materials, National Research and Innovation Agency, Building 440-442 Kawasan Puspiptek Serpong, 15314 Tangerang Selatan, Indonesia. c) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO Box BLS 21, 55281 Yogyakarta, Indonesia. Abstract High sensitive and selective ammonia gas sensor has been fabricated and characterized based on Quart Crystal Microbalance (QCM) Coated with Polyvinyl Acetate (PVAc) Modified by Chitosan. Fabrication of nanofiber PVAc (15% w/w in DMF) on the QCM surface was carried out by electrospinning method with collector distance of 15 cm and a voltage of 15 kV. The low molecular weight of chitosan was modified by 1% w/w in 2% of acetate acid. Dilution of 1% chitosan to 0.1%, 0.2%, and 0.3%, followed by chitosan deposition used the drop case technique on QCM-PVAc. The results indicated that the best optimization was at 0.3% chitosan, which cause high sensitivity of sensor. QCM-PVAc/Chitosan 0.3% has a sensitivity of 1.7 Hz/ppm- and the linearity of 0.99 in the range (0 - 500) ppm. Meanwhile the limit of detection (LOD) and limit of quantitation (LOQ) 15 ppm and 46 ppm- response time was 7 seconds- good stability- great selectivity to ethanol, toluene, methanol, acetone, and water compounds. The addition of drop casted chitosan has increased the selectivity and sensitivity of the sensor. Keywords: Ammonia, Chitosan, PVAc, QCM, Selectivity, Sensitivity. Share Link | Plain Format | Corresponding Author (Laila Katriani)

44	Theory and Design	ABS-49
Development of Repeatable Taste Sensor Based on a Mixture of Two Lipid membrane for Saltiness Rita Prasetyowati (a*), Hanif Khoirudin (a), Moch. Rifqi Tamara (a), Pekik Nurwantoro (a), Roto (b), Kuwat Triyana (a*) a)Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO Box BLS 21, 55281 Yogyakarta, Indonesia. b) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO Box BLS 21, 55281 Yogyakarta, Indonesia. *rita.prasetyowati2880[at]mail.ugm.ac.id *triyana[at]ugm.ac.id Abstract Our study aimed to investigate the repeatability of taste sensors for saltiness. The sensor is based on a lipid membrane consisting of a mixture of two types of lipids. The lipids used are hexadecanol and tetradodecylammonium bromide (TDAB). Other materials used are dioctyl phenylphosphonate (DOPP) as a plasticizer, polyvinyl chloride (PVC) as a matrix and tetrahydrofuran (THF) as a solvent. The solution (sample) tested is sodium chloride (NaCl) with three variations in concentration ( 0.1 mM- 1 mM- and 10 mM). The response of the sensor is indicated by the potential difference between the sample potential (Vs) and the reference potential (Vr). The difference in potential (Vs - Vr), called the relative value. Sensor responses show that the sensor can evaluate saltiness with three variations of concentration. Measurements for five consecutive days show that the sensor is repeatable. This is indicated by the sensor response which is almost the same for five days. Keywords: membrane, lipid, sensor, saltiness, repeatable Share Link | Plain Format | Corresponding Author (Rita Prasetyowati)

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