physics

Stellar Pots

Nature's Recycling Factory
Registration: 
Open to all.
Date: 
27 February 2009, Friday
Time: 
11 am
Venue: 
Department of Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore
Abstract: 

The iron running in our blood, calcium in our teeth, the sand we walk on, were all made inside stars. All elements heavier than boron are formed by nuclear reactions inside stars. We owe our existence to these stellar pots. Stars live for millions to billions of years and then it is a fierce battle for their survival. Ultimately they loose the battle and the resulting supernovae disperse the synthesized elements in the universe. Nature does not know of waste products and from stellar dust many more stars are created. In this talk we would discuss the birth and demise of stars. It is for the audience to decide if it is more of stellar science or abstract art.

Resource People: 
Lecturer
Dr. Jameel-un-Nabi
Ghulam Ishaque Khan Institute of Engineering Sciences and Technology, Topi, NWFP

Usefulness of Extra Dimensions of Spacetime

Registration: 
Open to all.
Date: 
27 January 2009, Tuesday
Time: 
6 pm
Venue: 
Environmental Law College, University of the Punjab, Quaid-e-Azam Campus, Lahore
Resource People: 
Speaker
Dr. Pervez Hoodbhoy
Chairman, Department of Physics, Quaid-e-Azam University, Islamabad

Nanowires Grown by Beam Epitaxy

Registration: 
Open to all.
Date: 
04 December 2008
Time: 
11 am
Venue: 
Centre for Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore
Abstract: 

Semiconductor nanowires (NWs) are attracting wide interest due to their unique physical properties and potential for application in nanodevices. NWs can be obtained by a number of growth methods, and their highly anisotropic growth originates by the presence of a metal particle, the catalyst, that determines the position and the diameter of the nanostructure. The most widely used catalyst is gold. The growth mechanism of catalyst assisted nanowires involves the incorporation of material both impinging on the catalyst particle and diffusing from the free substrate surface to the sidewalls of the wire. The interplay of these two phenomena is critical especially for the growth of alloy semiconductor compound NWs and one dimensional (1-D) heterostructure. Difference in the surface mobility between the constituents could give compositional inhomogeneities in alloy NWs and degradation of the interface sharpness in 1-D heterostructure. The systematic presence of a metal particle at the NWs tip could be exploited in single NW devices. Moreover, one of the most interesting characteristic of the III-V NWs grown by catalyst assisted self assembling is the peculiarity of having an hexagonal lattice structure (wurtzite), while their bulk and epitaxial parent materials have the cubic structure (zinc blend). In our laboratory we have synthesized GaAs NWs by molecular beam epitaxy (MBE) either using a thin gold, manganese, Ga layer as the growth catalyst or without any catalyst. In this talk some of the basics of NWs, their growth and potential applications will be covered.

Resource People: 
Presenter
Fouzia Jabeen
Elletra Synchrotrone, University of Trieste, Italy.

Quantum Computing

Myth or Reality?
Registration: 
Open to all.
Date: 
15 July 2008
Time: 
11:00 am
Venue: 
University of Management and Technology, 2S 43 South Block UMT, C-II Johar Town, Lahore
Abstract: 

Quantum computers have occupied the imagination, time, energy and resources of many researchers worldwide. About ten years after the first prototypes became implementable in labs worldwide, are we still too far removed from a practical, useful realization? This talk will cover the basics of what quantum computers are, what they (or might) look like and why is there so much hype about them. This will be an elementary introduction aimed at the college-level science students.

Resource People: 
Speaker
Dr. Sabieh Anwar
LUMS School of Science and Engineering, Lahore University of Management Sciences, Lahore

Is reality really real?

From Albert Einstein to John Bell and beyond
Registration: 
Open to all.
Date: 
05 May 2008
Time: 
11:00 am
Venue: 
University of the Punjab, Lahore
Abstract: 

From elementary particles to superconductors, nature of vacuum to electronics industry, radioactivity to black holes, quantum mechanics has emerged as one of the most brilliant outcomes of the modern mind. But quantum mechanics is also riddled with paradoxes and counter-intuitive observations. It has cast doubts on the nature of "reality" itself! Does the moon really exist, whether we look at it or not? Come and explore how the greatest minds of our times have made attempts at reconciling quantum theory with reality, if at all possible? All in the words of one of Pakistan's most distinguished scientists.

Resource People: 
Speaker
Dr. M. Suhail Zubairy
Institute for Quantum Studies, Texas A&M University, Texas, USA

The Shape of Space

M-Branes and 11-Dimensional Geometry
Registration: 
Open to all.
Date: 
27 November 2007
Time: 
11:00 am
Venue: 
Department of Physics, University of the Punjab, Lahore
Abstract: 

General Relativity tells us that all massive objects deform the backgrounds into which they are placed so that the very shape of space is changed by their presence. If, in addition, these objects happen to be charged, they give rise to a flux which distorts the background still further. In the talk, we will apply these simple ideas to gather information about the elusive 11-dimensional M-theory which gives rise to string theory. We will try to categorize some of the geometries that are allowed in M-Theory by studying what happens to a background when stable hyper-dimensional objects called BPS M-branes are brought into it.

Resource People: 
Speaker
Prof. Dr. Tasneem Zehra Husain
LUMS School of Science and Engineering, Lahore University of Management Sciences, Lahore

National Workshop on Crystal Structure Determination Using Powder X-ray Diffraction

Registration: 
Registration is required.
Date: 
15 August 2007
Time: 
09:00 am
Venue: 
Centre for Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore
Abstract: 

Powder X-Ray Diffraction is now a common technique used in the structure determination of different crystals. Read this Article on the Workshop on structure determination using powder X-ray diffraction.

 

Resource People: 
Presenter
Dr. Falak Sher
Pakistan Institute of Engineering and Allied Sciences (PIEAS), Islamabad
Presenter
Dr. N.M. Butt
Chairman Pakistan Science Foundation, Islamabad
Presenter
Dr. Umair Manzoor
Department of Physics, COMSATS, Islamabad
Presenter
Dr. Saadat Anwar Siddiqi
Centre for Solid State Physics, Punjab University, Lahore
Presenter
Dr. Arshad S. Bhatti
Department of Physics, COMSATS, Islamabad
Presenter
Dr. Sabieh Anwar
School of Science and Engineering, LUMS, Lahore
Presenter
Dr . Menges Goetz
Bruker-AXS, Germany

Carbon-Based Nanotechnology

Indigenous Research in Pakistan
Registration: 
Open to all.
Date: 
22 May 2006
Time: 
11:00 am
Venue: 
Faisal Library, University of Engineering and Technology (UET), Lahore
Abstract: 

Nanotechnology research in Pakistan dates back to late 1990's and at the moment it is one of the hottest research topic in the country. A number of research groups in private and government sector holds promise to bring this futuristic but practical technology to Pakistan. Carbon based Nanotechnology research was initiated in PINSTECH in 1998 by accidental observation of carbon clusters in locally developed heavy ion accelerator. The research was accelerated in 2003 with the funding of Ministry of Science and Technology to make Pakistan's first research laboratory dedicated for carbon based nano-science and technology. In this introductory talk I will give a glimpse of indigenous research we are doing in PINSTECH that includes both experimental and computational areas. The aim of this talk is to prove that Pakistan is not so backward in this high-tech area and we would like to invite and promote youngsters to step into this new but developing area.

Resource People: 
Speaker
Sabih-ud-Din Khan
Pakistan Institute of Nuclear Sciences and Technology, Islamabad
Supplementary Documents: 

Nanoengineering and Fabrication of Intelligent Devices that can Shape the Future

Registration: 
Open to all.
Date: 
21 May 2006
Time: 
11:00 am
Venue: 
Faisal Library, University of Engineering and Technology (UET), Lahore
Abstract: 

This talk will be focused on some of the scientific themes and applications in which electron energies reached for device or process operation are above that of the surrounding lattice or environment. Within the scope of the topic I will attempt to describe the vision of the global nanoscience community which is to 'exploit science in the nano-scale to inspire intelligent devices that can shape the future'. Freeman Dyson once said; "Technology is a gift of God. After the gift of life it is perhaps the greatest of God's gifts. It is the mother of civilizations, of arts and of sciences." With this in mind, I will also talk about what we can do to help take our ideas in the exploitation of knowledge to build good technologies for the future. Examples associated with the scale up of plasma technologies for the growth of carbon nanotube systems, use of organic nanocomposites for the production of solar cells and the novel processing routes of materials for display products and next generation transistors will be utilized. Novel Processes such as Ion beam lithography, Focused ion beams, Smart cut and Dual platform systems are versatile tools for nanoengineering and nanoscience applications and can be used to rapidly prototype and modify a diverse range of nano-devices and sensors. I will discuss the use of these systems for nanoengineeing and fabrication using examples from research.

Resource People: 
Speaker
Dr. Ahmed Shuja
Department of Physics, COMSATS Institute of Information Technology, Islamabad

Nanostructures and their Applications

Registration: 
Open to all.
Date: 
19 May 2006
Time: 
11:00 am
Venue: 
Faisal Library, University of Engineering and Technology (UET), Lahore
Abstract: 

The talk will be based on synthesis and applications of nanostructures in various areas like energy, photonics, and biology. With the tools available to fabricate devices from top down approach, it is utmost desire to develop techniques, which mimic nature, i.e., assemble atoms and molecules in a manner that these can be used for applications. A lot of effort is being carried out to control the growth of matter at nanoscale. The talk will cover fundamentals of self-assembly and then use of nanostructures/nanoparticles in a variety of devices.

Resource People: 
Speaker
Dr. Arshad Saleem Bhatti
COMSATS Institute of Information Technology