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Ashfaq Adnan's blog

USNCCM-11 Minisymposium on Multiscale Transport Phenomena in Biological and Biomedical System

Submitted by Ashfaq Adnan on

Dear Colleagues:

Wing Kam Liu and I (Ashfaq Adnan) would like to invite you to submit abstract(s) to the following mini-symposium at the upcoming 11th U.S. National Congress on Computational Mechanics (http://www.usnccm.org/). The congress is scheduled to be held on July 25-29, 2011 in Minneapolis, Minnesota, USA.

 14.2 Multiscale Transport Phenomena in Biological and Biomedical System 

Post-Doctoral Position in Multiscale Mechanics & Physics (MMC) Lab at University of Texas, Arlington

Submitted by Ashfaq Adnan on

We have an immediate opening for an outstanding post-doctoral fellow in our Multiscale Mechanics& Physics (MMP) Laboratory.  We are broadlyinterested in the fundamental physics and mechanics of nano/bio materials andtheir applications in innovative nano/bio devices. The focus of our current projects include: (i) nanoscale transport phenomena in pharmaceutical, biomedical and biologicalsystems, (ii) mechanics of nanodefects and their applications in engineering nanodevices,(iii) multifunctional and advanced materials for structural applications.

Three year OCE Postdoctoral Fellowship in computational nanotechnology

Submitted by Ashfaq Adnan on

Applications are invited for a three year OCE Postdoctoral Fellowship in computational nanotechnology, working with scientists from the Virtual Nanoscience Laboratory in the CSIRO Materials Science and Engineering division at Clayton, in Australia. The successful applicant will work be involved in predicting the material properties for optimal nanodiamond-based drug delivery systems, in collaboration with a multi-national interdisciplinary team.



Why Griffith's Law of fracture does not hold at the nanoscale

Submitted by Ashfaq Adnan on

We know from fracture mechanics theories that fracture instability in a perfectly brittle material occurs when energy release rate (G) becomes equal or more than two times the surface energy (γ) of that material. The value of G = 2γ is known as fracture toughness Gc. This is the classical Griffith criteria of brittle fracture. Experimentally, however, we know that plasticity becomes eminent for most materials and this criteria does not work.

Effect of Surface Morphology on the Stability of Thin Nanostructures

Submitted by Ashfaq Adnan on

We have recently studied the atomic scale structural stability of
freestanding wavy gold (Au) nanofilms using molecular dynamics
simulations. In recent years, wavy or patterned structurs have shown great promise for applications in various emerging technologies including fuel cells
engineering, tissue engineering, biomedical engineering, creation
of counterfeit-resistant documents , nanolithography in microelectronics, optoelectronics, nanomachinesand many others. It is out of question that the success of these novel applications lies on one crucial factor – the

Types of Impurities in single crystal semiconductor nanostructures

Submitted by Ashfaq Adnan on

Hi,

I am looking for information about formation, distribution,
concentration and stability of impurties/ defect in semiconductors,
specifically for cubic SiC. I have some discrete set of
literartures which are neirther systematic, nor elaborate. I would truly
appricitate if any one can suggest me some references.

 

Sincerely,

-Ashfaq Adnan 

Need help: Relation between polymer end-to-end distance and mechanical properties

Submitted by Ashfaq Adnan on

Hi,

I found in polymer books and some literatures that mechanical properties of polymer improve with the increase of their radius of gyration or end-to-end distance for a fixed molecular weight. I, however, could not find any experimental evidence or any physical explanation. 

It will be a great help to me if anyone refer me some literatures that explains the connection between these two parameters.

 Thanks,

Ashfaq Adnan

Mechanical Properties and Lattice Structure of Single Crystal 3C-SiC

Submitted by Ashfaq Adnan on

Hi,

I truly appriciate if anyone can help me find mechanical properties and crystal structure of beta SiC single crystals. Any reference or link will be highly appriciated

Sincerely,

-Ashfaq Adnan