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shah Ashraf
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shah Ashraf's Page

Profile Information

I am...
Physicist
My research field or area of interest innanotechnology
Nano technology
Interest in...
applications of Nano in bio
Publication list
News
Alternative Synthetic Pathways for Metal Oxide Nanomaterials Goodbye to organics: Toxic and volatile solvents are avoided
Nanoscience is regarded and acknowledged as triumph of human ingenuity. The requirements of simple and reliable protocols for the preparation of nanomaterials with controlled morphology continue to be a major challenge in nanosciences. Carbon nanotubes (CNTs) were not the only materials to raise red flags. Nanostructures including particles, rods, wires, belts, cages, walls, flowers and rings have been reported to be harmful. Their unique physical characteristics raise concerns that tiny clamps of metals, ceramics and organics could prove uniquely toxic as well. Nanomaterials made from the urea, polyethylene glycol, polyvinylpyrrolidone, polytertrafluoethylene or PTFE, showed even more dramatic effects. Toxicologist, Gunter reported that when his lab exposed rats to air containing nanoparticles for 15 minutes, most of the animals died within 4 hours. Gunter in his report suggested that the technique for making smaller particles could have altered them chemically.
Chemical synthesis of nanomaterials has been reviewed by many authors and improvements and better methods have been reported continually in the last few years. An overview of those methods [see reference 1], however, shows that they involve multistep process and frequent use of amines and other structure directing reagents. Hence, the synthesis is usually tedious and requires careful removal of catalysts and reagents. In addition, the path ways suggested involve environmentally harmful chemicals which are toxic and not easily degraded in the environment. Organic solvents are also problematic because many are harmful to health and environment. Other techniques (physical) are technically complex, requires high temperature, harsh growth conditions, expensive experimental set up and complicated control process. A simple approach that can avoid organics or amines for large scale production and controlled growth of versatile nanomaterials is, therefore, highly desired.
In response to the above concerns, Shah Ashraf have discovered and explored a new bio-safe and bio-compatible route for the synthesis of oxide nanomaterials. The route is based on simple reaction of water and metal powder at relatively low temperature. Since water is regarded as a benign solvent and non toxic, the product (nanostructures) could be used safely for biomedical and other applications. In addition, the method is simple, fast, economical, involves green chemistry, which can make it suitable for scale large production. The prospects of the process are bright and promising. The approach described above is expected to show marvelous results.
[1] M.A.Shah, A. Towkeer, Principles of Nanoscience and Nanotechnology, Naroosa Publishing House, New Dehli, 2010.
(ashrafshah2003@yahoo.co.in)
Researchgroup, Institute, University, School, Company name
Electron Microscopy Centre, NIT, Srinagar-190006
Researchgroup, Institute, Company, University, School webpage
http://www.nitsri.net
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Shah Ashraf's Blog

small science

Posted on March 28, 2013 at 2:55pm 1 Comment

NANOTECHNOLOGY: THE SCIENCE OF SMALL

science of small

Posted on March 24, 2013 at 12:49pm 0 Comments

NANOTECHNOLOGY: THE SCIENCE OF SMALL

Comment Wall (35 comments)

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At 4:35pm on December 4, 2011,
Full member
Shahid Ul Islam Wani
said…
Asalam u Alikum sir
I am student pursuing B-Tech in civil Engineering .i want to know if there is any application of nano technology in civil engineering field.
At 8:53pm on August 14, 2011,
Full member
RAJ VEER SINGH
said…

respected sir

i want to study your book  Principles of  Nanoscience and Nanotechnology.kindly send me the link from where i can download. please guide me to do p.hd in the nanaotechnology field.

At 2:52pm on May 14, 2011,
Full member
Shima Tavakol
said…

Hi

I did not have any permission to submit a pepare till 4month ago, because of some rules in my school but after that time I submited 2 paper.

At 7:57am on September 11, 2010,
Full member
Rajeshkumar
said…
dear sir

i am rajesh rasearch scholar in nanobiotechnologist.... i have interst to study your book sir.. please sent informatiion about your book sir..... MY MAIL ID IS mailmessr@ymail.com
At 9:49am on August 23, 2010,
Full member
Rajeshkumar
said…
hello sir

how are you
At 2:07pm on August 14, 2010,
Full member
Shivam Rastogi
said…
Respected Sir,

I am Shivam Rastogi, recently graduated from Jaypee University of
Information Technology, Wakhnaghat, Shimla , India in Electronics and
Communication Engineering,
I got through your research page where I have seen your interest
that you are carrying out in the area of Nano Science
I have done some research work at the time of my under graduation
and published in different international publications which helps
keeping me abreast with the latest technology up-gradation in
Nanotechnology.

Sir I would be very grateful if you please guide me to pursue career
for Research as further I am interested to pursue MS in Nano Science
and Technology henceforth I request you to please throw some light on
What are the opportunities do I have ?
Sir Please mail me your contact details so that I can send you my Resume.
With Regards,
Shivam Rastogi
INDIA.
contact details: +91-7206256759
shivam.ece.juit@gmail.com
At 2:38pm on August 7, 2010,
Full member
Silambarasan Physics
said…
Thank u sir... for add me as ur friend
At 7:00pm on August 3, 2010,
Full member
Silambarasan Physics
said…
Dear sir,
i need one information about M.E/M.Tech Nanotechnology in INDIA or abroad, also i need the syllabus of this course. if its available, Please send me my mail id: silmbunet5@gmail.com, (or) physicssilambarasan@gmail.com
At 6:49pm on August 3, 2010,
Full member
Silambarasan Physics
said…
Thank you sir..
At 4:14pm on August 3, 2010,
Full member
Laura Lucan
said…
Dr. Ashraf,
Have you published the TOC of your textbook omewhere online? would it be possible for me to see it? I'm interested in a "classical" textbook, simple to complex, end-of-chapter q&a, etc. We run a program of about 25 students.
Thank you,
Laura
 
 
 

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