Improvement QCM Quality By Polystyrene Coating and Bovine Serum Albumin as Immobilization Agent

Didik, Lalu A.; Yahdi, Yahdi; Masruroh, Masruroh

doi:10.24042/jipfalbiruni.v8i1.3716

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…The electrolyte solution from the ceremai fruit was then diluted with several variations in concentration (100%, 90%, 80%, 70% and 60%) by mixing the solution with distilled water (Didik, 2020;Didik et al, 2021). The equation used to dilute the electrolyte solution of ceremai fruit used equation 1 (Didik et al, 2019;Islami et al, 2021).…”

Section: Methodsmentioning

confidence: 99%

Characteristic of Ceremai Fruit Electrical Properties as Electrolyte Solution in Galvanic Cells

Meiliyadi¹,

Damayanti²,

Syuzita³

2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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It has been conducted a research to analyze ceremai fruit (Phyllanthus acidus) as an electrolyte solution for galvanic cells. The materials used consisted of copper (Cu), zinc (Zn) electrodes and an electrolyte solution from ceremai fruit. Electrolyte solution with a concentration variation of 60 to 100% was obtained from pure ceremai fruit electrolyte solution mixed with aquades. In addition, the electrolyte solution is fermented in a period of 1 to 5 days. The variables measured were pH, voltage, electric current and electric power. Based on the data analysis, it was found that the value of the acidity level was proportional to the concentration where at 100% solution concentration the pH value was 4.8 and at 60% the pH value was 5.4. The greatest voltage is 1 volt that obtained when the solution is in the most acidic state or highest concentration. It is found that the greater the concentration of the solution, the smaller the pH value (the acidity level increases) the value of the voltage, current and power will increase. However, when the electrolyte solution is fermented, it appears that the pH value is inversely proportional to the voltage generated. The longer of fermentation time, the pH value will increase but the voltage value will decrease. When the electrolyte solution is fresh, the pH value is 4.8 with a voltage of 1 volt, but on the 5th day of fermentation the acidity level increases with pH value of 2.15 but the voltage decreases to 0.65 volts. This is caused by oxygen exposure at the time of measurement so that the oxygen in the solution will increase. An increase of oxygen will reduce the density of electrically charged ions so that the current will decreases and the voltage will also decrease.

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Section: Methodsmentioning

confidence: 99%

Characteristic of Ceremai Fruit Electrical Properties as Electrolyte Solution in Galvanic Cells

Meiliyadi¹,

Damayanti²,

Syuzita³

2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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“…The added mass on the surface of QCM resulted in the adding value of inductance, which lowered the value of resonance frequency. Thus, on the impedance-frequency graph, the value of resonance frequency moved to the left side [13]. The changes on frequency was determined by calculating the range between resonance frequency of QCM before being coated by either polystyrene or ZnPc.…”

Section: Fig 3 Impedance Characteristic Of Qcm Biosensormentioning

confidence: 99%

“…In addition to its protective role in circumventing the corrosion, the layer made of polystyrene can immobilize proteins through physical absorption. Polystyrene plays a role as a matrix in biosensor, so it directly relates to analyses used in the biosensor [13]. Therefore, this research studied about morphology PS and ZnPc thin film on QCM surface.…”

Section: Introductionmentioning

confidence: 99%

Characteristic of QCM Coated Polystyrene and ZnPc Morphology Studied by AFM and SEM

Didik¹

2020

Proceedings of the 2nd International Conference on Islam, Science and Technology (ICONIST 2019)

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In this work, Quartz Crystal Microbalance (QCM) has been coating by Polystyrene (PS) and Zinc Phthalocyanine (ZnPc). This study aimed to examine the effect of coating using PS and ZnPc on the immobilization ability of QCM towards Bovine Serum Albumin (BSA) biomolecule. Polystyrene was used to coat the surface of QCM using Spin Coater technique, while ZnPc was coated by means of vacuum evaporation method. Surface characterization was performed using Scanning Electron Microscope (SEM) and Atomic Force Microscope (AFM), the QCM impedance was measured by using Impedance Analyzer; while the changes on its frequency was gauged by using frequency counter. Drawing on the SEM results, it was unveiled that PS layer was coated densely, while ZnPc was coated with full of roughness. The roughness of the PS and ZnPc layer was 244 nm and 88.9 nm respectively.

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“…The QCM is a piezoelectric sensor consisting of a thin quartz crystal and the two sides coated with silver or gold electrodes [12]. The working principle of QCM based on changes in resonant frequency due to changes in mass, according to the Saurbrey equation [13].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Potentiostat Scan Rate Variation on Impedance Value, Topography, and Morphology of the Polyaniline Thin Film

Sa'diyah

Putri

2021

JPSE

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The effects of potentiostat scan rate on the impedance, topography, and morphology of the Polyaniline (PANi) thin film has observed in this study. PANi has deposited on the Quartz Crystal Microbalance (QCM) surface with various scan rates, and changes in the impedance value have observed through an impedance analyzer test. Topography Measurement System (TMS) has observed the layer topography, while the layer morphology has observed using optical microscopy and Scanning Electron Microscope (SEM). The results have shown that the best sample has a scan rate of 10 mV/s, with a low impedance value indicating the layer has rigid. The variation in scan rate can affect the impedance value, but it is not significant and does not indicate a damping effect on QCM. A homogeneous layer is deposited at a low scan rate from topography and morphological observations, while a high scan rate results in an inhomogeneous layer.

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Improvement QCM Quality By Polystyrene Coating and Bovine Serum Albumin as Immobilization Agent

Cited by 5 publications

References 13 publications

Characteristic of Ceremai Fruit Electrical Properties as Electrolyte Solution in Galvanic Cells

Characteristic of Ceremai Fruit Electrical Properties as Electrolyte Solution in Galvanic Cells

Characteristic of QCM Coated Polystyrene and ZnPc Morphology Studied by AFM and SEM

The Effects of Potentiostat Scan Rate Variation on Impedance Value, Topography, and Morphology of the Polyaniline Thin Film

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