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Your search keyword '"Sugiarto, Iyon Titok"' showing total 9 results
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9 results on '"Sugiarto, Iyon Titok"'

8. Detection of CdSe Quantum Dot Photoluminescence for Security Label on Paper.

Author

Isnaeni, Sugiarto, Iyon Titok, Bilqis, Ratu, and Suseno, Jatmiko Endro

Subjects
*CADMIUM selenide, *CHEMICAL detectors, *QUANTUM dots, *PHOTOLUMINESCENCE, *PAPER, *CHEMICAL potential
Abstract

CdSe quantum dot has great potential in various applications especially for emitting devices. One example potential application of CdSe quantum dot is security label for anti-counterfeiting. In this work, we present a practical approach of security label on paper using one and two colors of colloidal CdSe quantum dot, which is used as stamping ink on various types of paper. Under ambient condition, quantum dot is almost invisible. The quantum dot security label can be revealed by detecting emission of quantum dot using photoluminescence and cnc machine. The recorded quantum dot emission intensity is then analyzed using home-made program to reveal quantum dot pattern stamp having the word 'RAHASIA'. We found that security label using quantum dot works well on several types of paper. The quantum dot patterns can survive several days and further treatment is required to protect the quantum dot. Oxidation of quantum dot that occurred during this experiment reduced the emission intensity of quantum dot patterns. [ABSTRACT FROM AUTHOR]

Published
2016
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9. Quantitative Analysis of Color Combination from LED and Laser Light Sources Using Modified CIE 1931 Color Space Coordinates.

Author

Isnaeni and Sugiarto, Iyon Titok

Subjects
*COLOR of lighting, *LED lighting, *LIGHT emitting diodes, *SPECTROPHOTOMETERS, *QUANTITATIVE research, *COORDINATES
Abstract

In this study, a quantitative analysis was conducted based on the CIE 1931 color space to determine a number of color combinations of three LED (light emitting diode) light sources and three laser sources respectively. The light sources used in this research were three LEDs that emitted blue, green and red light, and three laser sources that also emitted blue, green and red light. The results of the color combinations of these light sources were captured using a spectrophotometer. The obtained light spectra were then analyzed using a set of color matching functions that was modified specially for the spectrophotometer used. This research produced a quantitative analysis of 26 color combinations from LED light sources and 7 color combinations from laser light sources. The results of the color combinations ranged from blue, cyan, yellow, orange and red to purple. Further development of the proposed method is still required to obtain more reliable quantitative analysis results. [ABSTRACT FROM AUTHOR]

Published
2017
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