Characterization of antibacterial compounds from ganoderma boninense

The organic semiconductors potentially offer attractive characteristics, such as low-temperature fabrication, flexibility deposition technique, low-cost processing, and light-weight, which can be used as an active component in a wide range of electronic applications. Recently, organic semiconductors...

Full description

Saved in:

Bibliographic Details
Main Author:	Syahriel Abdullah
Format:	Thesis
Language:	English English
Published:	2018
Subjects:	SB1-1110 Plant culture
Online Access:	https://eprints.ums.edu.my/id/eprint/42188/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/42188/2/FULLTEXT.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-ums-ep.42188
record_format	uketd_dc
spelling	my-ums-ep.421882024-12-16T04:06:57Z Characterization of antibacterial compounds from ganoderma boninense 2018 Syahriel Abdullah SB1-1110 Plant culture The organic semiconductors potentially offer attractive characteristics, such as low-temperature fabrication, flexibility deposition technique, low-cost processing, and light-weight, which can be used as an active component in a wide range of electronic applications. Recently, organic semiconductors have gained the attention to facilitate formation of thin film by using solution-processed deposition techniques. The solution-processable organic material such as poly(triarylamine) (PTAA) and 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) have been reported to exhibit low mobilities, which far comparable to that of vacuum-deposited organic semiconductors mainly due to the morphology of thin films. To achieve device performance to a higher level, morphology design and control by varying spin-coating condition such as spin speed is crucial. The MOM diode was designed by forming a PTAA-TIPS-pentacene layer based on the concentration of TIPS-pentacene, i.e. 0 %, 5 %, 10 %, 15 %, and 20 % in PTAA, between the indium tin oxide (ITO) electrode layer and the counter aluminium (Al) metal layer. X-ray diffraction (XRD) patterns revealed that with the intensity of diffraction peak for PTAA was increased by increasing the pentacene molecules in PTAA. This indicated that there is a binder effect between PTAA and TIPS-pentacene enhance the molecule ordering. Furthermore, the current-voltage (I-V) characteristics were measured using Keithley 2400 source meter unit from -10 to +10 V. Meanwhile, the frequency dependent electrical characteristics were measured using a precision LCR meter in the frequency up to 100 kHz. The turn-on voltage varies from 2.16 to 2.48 V depending on the concentration of TIPS-pentacene in PTAA semiconductors, respectively. The frequency dependence of the electrical responses is attributed to the distribution density of interface states that could follow the alternating current (AC) signal. Investigation exposed that conductance was strongly dependent on the frequency and bias voltage. The capacitance and series resistance were dependent up to constant value at the low frequency region (< 1 kHz), but the capacitance and series resistance were independent at high frequencies (< 100 kHz). The MOM diode showed the positive clamping circuit, where the diode discharges when input voltage in the negative side and charging when input voltage is positive side. In conclusion, blending small molecule organic semiconductors into semiconducting polymer have shown the improvement in electrical properties due to the influence of polymer binding on thin film uniformity and operational stability. 2018 Thesis https://eprints.ums.edu.my/id/eprint/42188/ https://eprints.ums.edu.my/id/eprint/42188/1/24%20PAGES.pdf text en public https://eprints.ums.edu.my/id/eprint/42188/2/FULLTEXT.pdf text en validuser dphil doctoral Universiti Malaysia Sabah Fakulti Sains dan Sumber Alam
institution	Universiti Malaysia Sabah
collection	UMS Institutional Repository
language	English English
topic	SB1-1110 Plant culture
spellingShingle	SB1-1110 Plant culture Syahriel Abdullah Characterization of antibacterial compounds from ganoderma boninense
description	The organic semiconductors potentially offer attractive characteristics, such as low-temperature fabrication, flexibility deposition technique, low-cost processing, and light-weight, which can be used as an active component in a wide range of electronic applications. Recently, organic semiconductors have gained the attention to facilitate formation of thin film by using solution-processed deposition techniques. The solution-processable organic material such as poly(triarylamine) (PTAA) and 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) have been reported to exhibit low mobilities, which far comparable to that of vacuum-deposited organic semiconductors mainly due to the morphology of thin films. To achieve device performance to a higher level, morphology design and control by varying spin-coating condition such as spin speed is crucial. The MOM diode was designed by forming a PTAA-TIPS-pentacene layer based on the concentration of TIPS-pentacene, i.e. 0 %, 5 %, 10 %, 15 %, and 20 % in PTAA, between the indium tin oxide (ITO) electrode layer and the counter aluminium (Al) metal layer. X-ray diffraction (XRD) patterns revealed that with the intensity of diffraction peak for PTAA was increased by increasing the pentacene molecules in PTAA. This indicated that there is a binder effect between PTAA and TIPS-pentacene enhance the molecule ordering. Furthermore, the current-voltage (I-V) characteristics were measured using Keithley 2400 source meter unit from -10 to +10 V. Meanwhile, the frequency dependent electrical characteristics were measured using a precision LCR meter in the frequency up to 100 kHz. The turn-on voltage varies from 2.16 to 2.48 V depending on the concentration of TIPS-pentacene in PTAA semiconductors, respectively. The frequency dependence of the electrical responses is attributed to the distribution density of interface states that could follow the alternating current (AC) signal. Investigation exposed that conductance was strongly dependent on the frequency and bias voltage. The capacitance and series resistance were dependent up to constant value at the low frequency region (< 1 kHz), but the capacitance and series resistance were independent at high frequencies (< 100 kHz). The MOM diode showed the positive clamping circuit, where the diode discharges when input voltage in the negative side and charging when input voltage is positive side. In conclusion, blending small molecule organic semiconductors into semiconducting polymer have shown the improvement in electrical properties due to the influence of polymer binding on thin film uniformity and operational stability.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Syahriel Abdullah
author_facet	Syahriel Abdullah
author_sort	Syahriel Abdullah
title	Characterization of antibacterial compounds from ganoderma boninense
title_short	Characterization of antibacterial compounds from ganoderma boninense
title_full	Characterization of antibacterial compounds from ganoderma boninense
title_fullStr	Characterization of antibacterial compounds from ganoderma boninense
title_full_unstemmed	Characterization of antibacterial compounds from ganoderma boninense
title_sort	characterization of antibacterial compounds from ganoderma boninense
granting_institution	Universiti Malaysia Sabah
granting_department	Fakulti Sains dan Sumber Alam
publishDate	2018
url	https://eprints.ums.edu.my/id/eprint/42188/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/42188/2/FULLTEXT.pdf
_version_	1818611449306546176

Characterization of antibacterial compounds from ganoderma boninense

Similar Items