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LAPORAN TAHUNAN
UNIVERSITI PERTAHANAN
NASIONAL MALAYSIA
2015
PERAK
Produk
Ruthenium Alkynyl
Complexes for
Nonlinear Optic
Applications
Gelled Tonic
Liquid Electrolytes
for Sodium
Rechargeable
Secondary Batteries
Effect Of Micro and
Nano-Size Fibrils
Extracted from
Bacterial Cellulose
on The Formation
of Reinforced Epoxy
Composites
Nama Penyelidik
Noor Aisyah binti Ahmad
Shah, Siti Zulikha binti Ngah
Demon, Noor Fadhilah binti
Rahmat
Dr. Siti Aminah binti Mohd
Noor
Dr. Norhana binti Abdul Halim
Bil.
1.
2.
3.
Anugerah
Perak
Perak
Perak
Ringkasan Produk
Optic and photonic technologies are the
subsystems of the military’s most advanced
weapons, guidance, communications and
visualizations systems. For example, lasers are
used for high-power directed-energy weapons,
while at low power it can be used for navigation.
In the making of lasers, it is great interest for the
materials to have great nonlinear optical (NLO)
properties. Organometallic complexes have
been proven to have great NLO properties.
Organometallic systems can possess intense
metal-to-ligand charge transfer (MLCT) and
ligand-to-metal charge transfer (LMCT)
bands in the linear optical visible spectrum,
large diversity of oxidation states and ligand
environments, and polarizable d electrons, in
which combination of all these characteristics
has contributed to large hyperpolarizability
and reversibly modulate nonlinearity. The
optimization of NLO properties can be
accomplished by varying the type of metals
and type of ligands. The metal center can be
a very strong donor or acceptor depending on
the ligands that surround the metal. Therefore
in this current study, we report the synthesis
of ruthenium alkynyl complexes, their crystal
structures, electrochemical properties, and
linear and quadratic nonlinear optical properties.
Over the last few decades, the growth of
research on rechargeable batteries has
significantly contributed to the development
of advanced energy and power sources.
Rechargeable batteries have become a leading
energy source in portable energy sources,
electrochemical devices, photo electrochemical
cells, electric vehicles and hybrid electric
vehicles. Current high power electrochemical
energy storage technologies rely on electrolytes
based on flammable solvents, which are typically
volatile organic compounds (VOCs) that result
in major safety problems when applied to
many novel applications. Owing to the unique
properties of certain Ionic liquids (ILs) as safe and
green solvents, as well as the potential of sodium
as an alternative to lithium as charge carriers,
we investigate gel sodium electrolytes as safe,
low cost and high performance materials with
sufficient mechanical properties for application in
sodium battery technologies. We investigate the
effect of formation of two types of gel electrolytes
on the properties of IL electrolytes known to
support Na/Na+ electrochemistry. The formation
of the gel electrolytes does not significantly
affect the ion dynamics of the ionic liquid
electrolytes. Thus these electrolyte materials
are promising candidates for secondary sodium
batteries, since they may overcome the cost and
safety problems associated with conventional
liquid electrolytes, while still exhibiting good
conductivities and stabilities.
Effect Of Micro and Nano-Size Fibrils Extracted
from Bacterial Cellulose on The Formation of
Reinforced Epoxy Composites