Pushpendra Kumar's Blog (5)

Investigations on structural, optical and second harmonic generation in solvothermally synthesized pure and Cr-doped ZnO nanoparticles

 

ABSTRACT.......

 

At the forefront of the current scientific revolution of nanoscience nanocrystals (NCs), crystalline particles grown in liquid media, stand out over other classes of inorganic nanomaterials due to the high degree of control with which their crystal structure, size, shape, and surface functionalities can be engineered in the synthesis stage and to the versatility with which they can be processed and implemented into a large spectrum of devices and…

Continue

Added by Pushpendra Kumar on December 25, 2011 at 12:46am — 2 Comments

Room temperature ferromagnetism in magic-sized Cr-doped CdS diluted magnetic semiconducting quantum dots

 

ABSTRACT...

 

Manipulation of carrier spins in semiconductors for spintronics applications has received great attention driven by improved functionalities and higher speed operation. Doping of semiconductor nanocrystals by transition-metal ions pronounced as diluted magnetic semiconductors (DMS) has attracted tremendous attention. Such doping is, however, difficult to achieve in low-dimensional strongly quantum-confined nanostructures by conventional growth procedures.…

Continue

Added by Pushpendra Kumar on December 25, 2011 at 12:36am — No Comments

Quantum Phase Transition from Superparamagnetic to Quantum Superparamagnetic State in Ultra Small CdSe: Cr2+ Quantum Dots by Pushpendra Kumar, Kedar Singh, JACS, DOI: 10.1021/ja2088426

 

Despite a long history of success in the synthesis, the origin of magnetism in diluted magnetic semiconductors (DMSs) is yet a controversial issue. Doping, that is, intentional incorporation of impurities into a material, is the crucial means of alteration the electronic, optical and magnetic properties of semiconductors. Cr-based DMSs go halves with the other due to remarkable magnetic and magneto-optic properties, originating from the "sp-d" exchange interaction…

Continue

Added by Pushpendra Kumar on December 25, 2011 at 12:33am — No Comments

|Quantum Phase Transition from Superparamagnetic to Quantum Superparamagnetic State in Ultra Small CdSe: Cr2+ Quantum Dots"

Despite a long history of success in the synthesis, the origin of magnetism in diluted magnetic semiconductors (DMSs) is yet a controversial issue. Doping, that is, intentional incorporation of impurities into a material, is the crucial means of alteration the electronic, optical and magnetic properties of semiconductors. Cr-based DMSs go halves with the other due to remarkable magnetic and magneto-optic properties, originating from the "sp-d" exchange interaction flanked by the band…

Continue

Added by Pushpendra Kumar on December 25, 2011 at 12:28am — No Comments

I got postdoctoral fellowship.....due to Nanopaprika. Thanx Nanopaprika.............

Hi All...

 

This is matter of great plesure of me to share with you all my experince.

 

Recently I got a very good postdoctoral due to nanopaprika.....i let you know all how this happen....

 

I just posted my resume here at nanopaprika.....and wait.......after few days i got i mail regarding PDF, I applied for that and submitted a projet for postdoc fellowship......

 

Very recently on 7 sept 2011 I came to know that i have selected…

Continue

Added by Pushpendra Kumar on September 12, 2011 at 10:01am — 17 Comments

Next partner events of TINC

We are Media Partner of:

Welcome - about us

Welcome! Nanopaprika was cooked up by Hungarian chemistry PhD student in 2007. The main idea was to create something more personal than the other nano networks already on the Internet. Community is open to everyone from post-doctorial researchers and professors to students everywhere.

There is only one important assumption: you have to be interested in nano!

Nanopaprika is always looking for new partners, if you have any idea, contact me at editor@nanopaprika.eu

Dr. András Paszternák, founder of Nanopaprika

Publications by A. Paszternák:

The potential use of cellophane test strips for the quick determination of food colours

pH and CO2 Sensing by Curcumin-Coloured Cellophane Test Strip

Polymeric Honeycombs Decorated by Nickel Nanoparticles

Directed Deposition of Nickel Nanoparticles Using Self-Assembled Organic Template,

Organometallic deposition of ultrasmooth nanoscale Ni film,

Zigzag-shaped nickel nanowires via organometallic template-free route

Surface analytical characterization of passive iron surface modified by alkyl-phosphonic acid layers

Atomic Force Microscopy Studies of Alkyl-Phosphonate SAMs on Mica

Amorphous iron formation due to low energy heavy ion implantation in evaporated 57Fe thin films

Surface modification of passive iron by alkylphosphonic acid layers

Formation and structure of alkylphosphonic acid layers on passive iron

Structure of the nonionic surfactant triethoxy monooctylether C8E3 adsorbed at the free water surface, as seen from surface tension measurements and Monte Carlo simulations