Effect of combination of dye carotene and phycocyanin using daucus carota and spirulina sp. on optical sensor performance

Abstract

<span>This research designed optical sensors using mercury lamp of 160W. These sensors provided voltage and current output. The design of optical sensors used the organic based material,i.e. dye carotene and phycocyanin. Fabrication of optical sensor in this research used spin coating deposition method. Based on the results of absorbance test, dye carotene had the largest absorption of light of 2.882 (a.u). Dye phycocyanin at length had the largest absorption of light of 2.787 (a.u). Combination between dye carotene and phycocyanin, for a 3: 1 (Carotene: Phycocyanin) ratio had a waveform like a dye carotene with a peak of 2.587 (au), whereas for 1: 3 had a waveform like phycocyanin with a peak of 2,279 (au). But, sample 1: 1 ratio had decrement the light absorbance rate with peaks of 1.183 (au). At the voltage testing result, combination of phycocyanin: carotene (1:3) had the best linearity. The response time of dye 3:1 (phycocyanin: carotene), 1:1, 1:3, phycocyanin, and carotene were 6.72 s, 2.469s, 1.171s, 2.66s and 7.01s respectively. </span>

Development of an optical pH measurement system based on colorimetric effect

“…This reagent is widely used as pH indicator in many colorimetric based pH measurements such as in cell culture, medical and water quality tests [27]- [29]. Its goal is to learn how well an optical sensor performs in terms of light absorption as a medium for photon absorption, as well as its ability to provide higher electrical parameter outputs, including current and voltage [30].…”