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Biotechnology Congress 2018 & Emerging Materials 2018 Biomedical Research | ISSN: 0976-1683 | Volume 29
S e p t e m b e r 0 6 - 0 7 , 2 0 1 8 | B a n g k o k , T h a i l a n d
alliedacademies Joint Event on
EMERGING MATERIALS AND NANOTECHNOLOGY
BIOTECHNOLOGY
&
Annual Congress on
Global Congress on
Shadmani Shamim et al., Biomed Res 2018, Volume 29 | DOI: 10.4066/biomedicalresearch-C4-010
CONTROLLED FLUORESCENCE IN
CHEMICALLY MODIFIED POROUS SILICA
NANOPARTICLES
Shadmani Shamim, Tanujjal Bora, Daniel Crespy and Gabriel L
Hornyak
Asian Institute of Technology, Thailand
Porous silica nanoparticles are a special class of nanoparticles with
potential applications in numerous areas, such as drug-delivery systems,
bio-sensing, bio-labeling, or as additives to polymer coatings. For these
applications, fluorescence property is suitable and therefore modification of
silica nanoparticles to make them fluorescent is becoming a regular process.
In our research, the synthesis of porous silica nanoparticles was performed
through a simple and cost-effective wet chemistry route using cetyltrimethyl
ammonium bromide (CTAB) as a template and structure directing agent and
tetraethyl orthosilicate (TEOS) as silica precursor. Various characterization
techniques, such as electron microscopy, FTIR (fourier transform infrared
spectroscopy), and helium-pycnometry were used to characterize the porous
nanoparticles. The fluorescence properties of the silica nanoparticles
were further investigated by modifying the synthesized nanoparticles with
3-aminopropyl triethoxysilane (APTES). Silane modified silica nanoparticles
were found to exhibit visible light fluorescence with variable intensity and
wavelengths that were controlled by calcinating the nanoparticles at different
temperatures. X-ray photoelectron spectroscopy (XPS) analysis of the
calcined nanoparticles revealed the presence of C, N, and O within the silica
lattice, suggesting these impurities as the possible source for the visible light
fluorescence exhibited by the porous silica nanoparticles. Such defects were
found tobe removedwhennanoparticleswere calcinedat higher temperatures
(800°C), resulting in the disappearance of visible light fluorescence from the
porous nanoparticles.
Shadmani Shamim has completed her Master of
Engineering degree in Nanotechnology in December
2017 from Asian Institute of Technology, Thailand.
Previously she did her bachelor’s degree in Electrical
and Electronic Engineering from Ahsanullah Universi-
ty of Science and Technology, Bangladesh. Currently,
she is working as a Researcher in the Center of Excel-
lence in Nanotechnology, AIT, Thailand. Her primary
research interest is synthesis and characterization of
nanomaterials.
BIOGRAPHY