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Volume 7, Issue 4(Suppl)
J Nanomed Nanotechnol
ISSN: 2157-7439 JNMNT, an open access journal
Page 74
Nano Congress 2016
August 01-02, 2016
conferenceseries
.com
August 01-02, 2016 Manchester, UK
9
th
Nano Congress for Next Generation
Chitosan a potent nanoparticle for nutritient delivery into plant systems
Surya Anjani Kumar
1
and
Archana Giri
2
Jawaharlal Nehru Technological University, India
F
ertilizers are organic compounds applied to plants to enhance growth and are applied either to the soil directly or by foliar
spreading. Thus applied fertilizers contribute to provide macro nutrients (NPK) to the plant. NPK helps in leaf growth, enhances
root elongation, fruiting & flowering, etc. According to
Saigusa.etal., 40-70% of Nitrogen, 80-90% of Phosphorous, 50-70% of
Potassium are lost to the environment but not absorbed by the plant, increasing the intrinsic economic loss and heavy environmental
pollution. Hence usage of bio fertilizers may be very much helpful in reducing the problem to major extent. Plants easily absorb bio
fertilizers and as they are from an organic source they may not harm the environment. But the absorption rate of bio fertilizers by
the plants is very low so, to enhance it certain facilitators are used which in conjugation with nutrients may help in easy absorption
of the nutrients. Recent studies have revealed that nanoparticles are one of the best mediators for delivering nutrients to the plants.
There are several inorganic mediators like silver nanoparticles, nanotubes, nano beads etc., and among them chitosan is found to be a
potent mediator for nutrient delivery. Studies have discovered that chitosan nanoparticles have controlled release of NPK fertilizer to
the plants. Chitosan is a polysaccharide derived from chitin a skeletal material of crustaceans. Due to its poly cationic nature, chitosan
reacts with negatively charged molecules showing a favourable reaction. Thus the ability of its controlling nanoparticle size it is highly
favourable for most of nanotechnology applications.
s.anjanikumar@gmail.comSynthesis and characterization of ZnO–TiO2 nanocomposites co-doped with Dy3+ and Eu3+ ions
Ella C Linganiso, Sefako J Mofokeng, Vinod Kumar, Robin E Kroon
and
Odireleng M Ntwaeaborwa
University of the Free State, South Africa
D
own-conversion in nanomaterial phosphors doped with Rare Earth (RE) ions is currently being explored for solar cell
applications. This is inspired by the ability of RE elements to luminescence over a wide range, from the near-infrared, through
visible to the ultra-violet wavelength energy regions, whilst exhibiting only weak interactions with the host lattice. Titanium dioxide
(TiO
2
), zinc oxide (ZnO), europium (Eu
3+
) and dysprosium (Dy
3+
) individually show excellent luminescence properties. In this
report, ZnO and TiO
2
nano-based composite phosphor was activated with different concentrations of Eu
3+
and Dy
3+
fabricated using
the sol-gel method of synthesis such that, ZnO-TiO
2
: xDy
3+
and yEu
3+
(x=0.4 and y=0.05 to 0.75 mol). The prepared phosphors
were characterized by X-ray Diffraction (XRD) technique for confirmation of the formation of the desired product, crystallinity
and product phase purity. The XRD patterns confirmed crystallization of wurtzite hexagonal ZnO and tetragonal TiO
2
(anatase and
rutile) phases. In addition, the XRD data confirmed that secondary phases of ZnTiO
3
and Zn2TiO
4
were also formed. Morphological
analysis was carried out using scanning electron microscopy (SEM), and formation of nanoflake-like structures, nanorods and
uniformly distributed structures was confirmed. Photoluminescence characterization of the as-prepared phosphors was carried out
under UV excitation at 248 nm and the prominent emission bands were observed in the visible region at 496, 584, 593 and 614 nm,
corresponding to transitions of Dy
3+
and Eu
3+
ions. The energy transfer mechanism between the ZnO-TiO
2
host and dopants (Dy
3+
and Eu
3+
) is discussed.
linganisoella@gmail.comJ Nanomed Nanotechnol 2016, 7:4 (Suppl)
http://dx.doi.org/10.4172/2157-7439.C1.041