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313 results on '"Sulaiman, Khaulah"'

2. Synthesize of PCPDTBT nanostructures and PCPDTBT_PC71BM nanocomposite via modified polymer-melt technique

Author

Doris, Muhamad, Sulaiman, Khaulah, and Supangat, Azzuliani

Subjects
Condensed Matter - Materials Science, Physics - Applied Physics
Abstract

PCPDTBT nanostructures have been synthesized via template-assisted method and polymer-melt technique. The morphological, optical and structural properties of the PCPDTBT have been investigated. Melting polymer was used as a driving force to infiltrate the Anodic Aluminum Oxide (AAO) template in which the applied temperatures are 200, 250, 300, 350, 400 and 450 Celsius respectively. The melting time duration is set constant for 30 minutes for each of those melting temperatures. Nanowires constructions have been produced at all melting temperature however based the morphological investigation, only the first two melting temperatures, 200 and 250, that can serve the structural without any broken noticed on the Raman measurement. The optical and structural properties are also confirm these facts., Comment: 25 pages

Published
2024

3. Facile Fabrication of a Low-Cost Electrochemical Temperature Sensor

Author

Abdullah, Shahino Mah, Rafique, Saqib, Abdullah, Mazwani, Ghazali, Mohd Ifwat Mohd, Daril, Mohd Amran Mohd, Wahab, Mohamad Ikbar Abdul, Sulaiman, Khaulah, Öchsner, Andreas, Series Editor, da Silva, Lucas F. M., Series Editor, Altenbach, Holm, Series Editor, Ismail, Azman, editor, Zulkipli, Fatin Nur, editor, and Mohd Daril, Mohd Amran, editor

Published
2024
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4. Comparison studies between BHBT2:PC71BM composite nanotubes and its bulk-heterojunction properties

Author

Doris, Muhamad, Supangat, Azzuliani, Hoong, Teh Chin, Sulaiman, Khaulah, and Daik, Rusli

Subjects
Physics - Applied Physics
Abstract

In this study, we investigate the morphological, structural, and optical properties of both bulk-heterojunction and composite nanotubes that composed of thiophene-based small molecules BHBT2 and fullerene PC71BM. Mix-blended and template-assisted methods were used to fabricate the bulk-heterojunction and composite nanotubes, respectively. A single material of BHBT2 thin films and nanotubes that fabricated via spin-coating and template-assisted methods, respectively, was also studied. Two different formations between bulk-heterojunction and composite nanotubes were compared to elaborate their advancement in properties. Absorption spectra of BHBT2:PC71BM bulk-heterojunction and composite nanotubes have fallen within the ultraviolet-visible (UV-vis) range. Field emission scanning electron microscope (FESEM) and high-resolution transmission electron microscope (HRTEM) images show that the carbon-rich of PC71BM, has successfully infiltrated into the BHBT2 nanotube to form the BHBT2:PC71BM composite nanotubes. However, due to the informality distribution of infiltration, charge carrier transfer is seen to be better in bulk-heterojunction rather than in the composite nanotubes., Comment: 25 pages

Published
2019

5. Impact of Compositional Engineering on PTB7-Th:PC71BM Capacitive Humidity Sensor Performance.

Author

Fatima, Noshin, Lim, Lih Wei, Bukhari, Sarah, Raza, Ehsan, Aziz, Fakhra, Shah, Zarbad, Ahmad, Zubair, Kamboh, Afzal, Tahir, Muhammad, Yakuphanoglu, Fahrettin, Supangat, Azzuliani, and Sulaiman, Khaulah

Subjects
CAPACITIVE sensors, DEVELOPING countries, ORGANIC semiconductors, METHYL formate, ALTERNATING currents, POLYMER blends
Abstract

The current investigation focuses on the development of capacitive humidity sensors utilizing an organic polymer blend of poly[4,8-bis(5-(2-ethylhexyl)thiophene-2-yl)benzo[1,2-b;4,5-b′]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)] (PTB7-Th) and [6,6]-phenyl-C71-butyric-acid methyl ester (PC71BM), which were successfully achieved. A cost-effective spin-coating technique was employed to produce surface-type sensors in the Al/PTB7-Th:PC71BM/Al horizontal geometry. The investigation focuses on the capacitive behavior of the devices under ambient conditions, specifically at room temperature. The devices are subjected to an alternating current operational bias of 1 V, while the relative humidity (RH) is varied within the range of 20–95%. The sensors are examined at frequencies of 100 Hz, 1 kHz, 10 kHz, and 100 kHz. Specifically, the sensors demonstrate improved sensitivity to changes in capacitance in relation to relative humidity when operating at a frequency of 100 Hz. In addition, an optimal volumetric ratio of 1.5:1 is selected for PTB7-Th to PC71BM. The optimized composite sensor demonstrates superior performance, exhibiting minimal hysteresis of 6.16% and significant sensitivity of 1.58 pF/% RH. In addition, response and recovery times of 2 s and 3 s, respectively, are obtained. The results of investigations demonstrate that the composite sensor exhibits significant improvements in sensing parameters compared to single-material sensors. As a result, the composite sensor has great potential for use in advanced sensor applications, especially in the education sector in underdeveloped countries. [ABSTRACT FROM AUTHOR]

Published
2024
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