Synthesis and characterization of starch nanoparticles and carbon nanodots

Starch is a well-known, versatile, and inexpensive biopolymer and it is a promising precursor material for preparation of nanoparticles. In this research, starch nanoparticles were synthesized from native sago starch and the potential applications of these starch nanoparticles as controlled release...

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Main Author:	Siti Nur Akmar, Binti Mohd Yazid
Format:	Thesis
Language:	English
Published:	2013
Subjects:	Q Science (General)
Online Access:	http://ir.unimas.my/id/eprint/9405/1/Siti%20Nur%20Akmar.pdf
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spelling	my-unimas-ir.94052023-08-03T05:10:43Z Synthesis and characterization of starch nanoparticles and carbon nanodots 2013 Siti Nur Akmar, Binti Mohd Yazid Q Science (General) Starch is a well-known, versatile, and inexpensive biopolymer and it is a promising precursor material for preparation of nanoparticles. In this research, starch nanoparticles were synthesized from native sago starch and the potential applications of these starch nanoparticles as controlled release carriers were evaluated. Curcumin was loaded into starch nanoparticles by using a simple precipitation in water-in-oil microemulsion approach. The effects of synthesis parameters such as types of reaction medium, types of surfactant and its concentrations, oil/ethanol ratios and curcumin concentration were found to affect the particle sizes, morphology and loading efficiency of the curcumin loaded starch nanoparticles. Curcumin was observed to release out from starch nanoparticles in a slow and sustanable way over the period of 10 days. In addition, these starch nanoparticles were used as precursors for the synthesis of fluorescent carbon nanodots (C-dots). The C-dots were synthesized by carbonization and surface oxidation of preformed sago starch nanoparticles. The fluorescence of these C-dots were found to be significantly quenched in the presence of Sn(II) ions, and such changes could therefore be utilized as a highly sensitive sensing probe for detecting Sn(II) ions. Parameters which influence the sensing characteristics of the C-dots probe had been optimized with its highest fluorescence intensity obtained at an optimum concentration of 1.75 mM in aqueous solution. The C-dots probe was highly selective and exhibited low interference responses towards several heavy metal ions tested. Based on spectroscopic study, the fluorescence quenching mechanism appeared to be predominantly of the static type compared to the dynamic one. Under optimum conditions, the probe exhibited a linear response range of Sn(II) ions concentration up to 4.00 mM, and with a detection limit (LOD) of 0.36 μM. University Malaysia Sarawak, UNIMAS 2013 Thesis http://ir.unimas.my/id/eprint/9405/ http://ir.unimas.my/id/eprint/9405/1/Siti%20Nur%20Akmar.pdf text en validuser masters University Malaysia Sarawak, UNIMAS Faculty of Resource Science and Technology
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English
topic	Q Science (General)
spellingShingle	Q Science (General) Siti Nur Akmar, Binti Mohd Yazid Synthesis and characterization of starch nanoparticles and carbon nanodots
description	Starch is a well-known, versatile, and inexpensive biopolymer and it is a promising precursor material for preparation of nanoparticles. In this research, starch nanoparticles were synthesized from native sago starch and the potential applications of these starch nanoparticles as controlled release carriers were evaluated. Curcumin was loaded into starch nanoparticles by using a simple precipitation in water-in-oil microemulsion approach. The effects of synthesis parameters such as types of reaction medium, types of surfactant and its concentrations, oil/ethanol ratios and curcumin concentration were found to affect the particle sizes, morphology and loading efficiency of the curcumin loaded starch nanoparticles. Curcumin was observed to release out from starch nanoparticles in a slow and sustanable way over the period of 10 days. In addition, these starch nanoparticles were used as precursors for the synthesis of fluorescent carbon nanodots (C-dots). The C-dots were synthesized by carbonization and surface oxidation of preformed sago starch nanoparticles. The fluorescence of these C-dots were found to be significantly quenched in the presence of Sn(II) ions, and such changes could therefore be utilized as a highly sensitive sensing probe for detecting Sn(II) ions. Parameters which influence the sensing characteristics of the C-dots probe had been optimized with its highest fluorescence intensity obtained at an optimum concentration of 1.75 mM in aqueous solution. The C-dots probe was highly selective and exhibited low interference responses towards several heavy metal ions tested. Based on spectroscopic study, the fluorescence quenching mechanism appeared to be predominantly of the static type compared to the dynamic one. Under optimum conditions, the probe exhibited a linear response range of Sn(II) ions concentration up to 4.00 mM, and with a detection limit (LOD) of 0.36 μM.
format	Thesis
qualification_level	Master's degree
author	Siti Nur Akmar, Binti Mohd Yazid
author_facet	Siti Nur Akmar, Binti Mohd Yazid
author_sort	Siti Nur Akmar, Binti Mohd Yazid
title	Synthesis and characterization of starch nanoparticles and carbon nanodots
title_short	Synthesis and characterization of starch nanoparticles and carbon nanodots
title_full	Synthesis and characterization of starch nanoparticles and carbon nanodots
title_fullStr	Synthesis and characterization of starch nanoparticles and carbon nanodots
title_full_unstemmed	Synthesis and characterization of starch nanoparticles and carbon nanodots
title_sort	synthesis and characterization of starch nanoparticles and carbon nanodots
granting_institution	University Malaysia Sarawak, UNIMAS
granting_department	Faculty of Resource Science and Technology
publishDate	2013
url	http://ir.unimas.my/id/eprint/9405/1/Siti%20Nur%20Akmar.pdf
_version_	1783728057921568768

Synthesis and characterization of starch nanoparticles and carbon nanodots

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