Advances in Natural Sciences: Nanoscience and Nanotechnology
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The prospect of using guava leaf extract for biosynthesizing chitosan nanoparticles
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
Chitosan is polysaccharide polymer used for biomedical applications and food
packaging. The aim of this investigation is to produce chitosan nanoparticles
(ChNPs) using guava leaf (Psidium guajava L.) extract as green synthesis of
nanoparticles using plant leaf extract is ecofriendly and cost-effective
approach. The leaves of guava are nontoxic, full of bioactive compounds, and
suitable alternativ...
#nano
In-situ study of molecular dynamics in a water environment by using imaging ellipsometry
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2010
We report on the dynamics of bio molecules and a high polymer in a water
environment by using imaging ellipsometry (IE). The morphology of collapsed
films of arachidic acid (AA) and
poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) Langmuir
monolayers in a liquid solution is investigated. The IE images clearly show that
the multilayer domains and thickness of the collapsed region...
#nano
Synthesis, structural and photocatalytic characteristics of nano-Cu2-xSe
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2011
Large-scale synthesis of Cu2−xSe nanocrystals (nano-Cu2−xSe) with uniform size
was performed via a facile hydrothermal method at room temperature and
at 120 °C. Nano-Cu2−xSe with different structures could be synthesized by
changing the reaction/growth time, the Cu:Se molar ratios, and the initial
concentration of the precursors. The synthesized nano-Cu2-xSe was characterized
using various techniq...
#nano
Micro/nano-mechanical sensors and actuators based on SOI-MEMS technology
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2010
MEMS (micro-electro-mechanical systems) technology has undergone almost 40 years
of development, with significant technology advancement and successful
commercialization of single-functional MEMS devices, such as pressure sensors,
accelerometers, gyroscopes, microphones, micro-mirrors, etc. In this context of
MEMS technology, this paper introduces our studies and developments of novel
micro/nano-m...
#MEMS #mechanical sensor #electrostatic actuator #silicon nanowire
Influence of surface topography on RBS measurements: case studies of (Cu/Fe/Pd) multilayers and FePdCu alloys nanopatterned by self-assembly*
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
In this paper the influence of surface topography on Rutherford backscattering
spectrometry (RBS) is discussed. (Cu/Fe/Pd) multilayers with total thickness of
about 10 nm were deposited by physical vapor deposition on self-organized array
of SiO2 nanoparticles with the size of 50 nm and 100 nm. As a reference, the
multilayered systems were also prepared on flat substrates under the same
conditions...
#nano
Evaluation of bio control potential of AgNPs synthesized from Trichoderma viride
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2020
Currently, there is a global effort to reduce the use of harmful substances,
particularly chemical pesticides in cultivation. The biological mechanism of
soil-borne phytopathogens has proven to be a good alternative to the use of
chemical pesticides. In recent times, synthesis of nanoparticle from fungus is a
trustworthy and sustainable method. The current study explores the synthesis of
silver na...
#nano
Characterization of the size distribution and aggregation of virus-like nanoparticles used as active ingredients of the HeberNasvac therapeutic vaccine against chronic hepatitis B*
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2019
The use of virus-like particles (VLPs) as antigens constitutes a well
established strategy in preventive vaccination. These non-infective particles
have a composition, size, and structure favoring their interaction and
processing by the immune system. Recombinant viral nucleocapsids encapsulating
bacterial nucleic acids result in potent Th1-driving immunogens. Several
antigens have been coadminist...
#nano
Fabrication of a silicon nanostructure-based light emitting device
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2010
Silicon nanostructure-based light emitting devices (nc_SiLED) have been
fabricated using conventional microelectronic technologies. The emissive layer
composed of silicon and silicon dioxide was deposited by magnetron
co-sputtering. Under forward bias, a broad electroluminescence (PL) spectrum in
the range 450–900 nm was observed, peaking at around 705 nm. The effect of Si
content in the active la...
#keyword
Synthesis and optical limiting studies of Au-doped TiO2 nanoparticles
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2011
A series of Au-doped TiO2 nanoparticles with different Au concentrations were
prepared by the sol–gel method using titanium (IV) isopropoxide and
tetrachloroaurate (III) trihydrate as precursors. The framework substitution of
Au in TiO2 nanoparticles was established by x-ray diffraction (XRD) and Fourier
transform infrared (FT-IR) techniques. X-ray diffraction (XRD) and transmission
electron micro...
#nano
Polymer materials with spatially graded morphologies: preparation, characterization and utilization
Advances in Natural Sciences: Nanoscience and Nanotechnology - - 2010
Experimental studies on polymer materials with spatially graded structures are
reviewed in this paper. A wide variety of principles and experimental methods
utilized to prepare and control these specific structures of polymer materials
are summarized and discussed. In particular, the method of using light to
generate and control these gradient morphologies in the micrometer scales is
summarized wi...
#nano
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