Oct. 27, 2008

Ravindra Bhatt
Professor, Electrical Engineering and Physics
Princeton University

Title TBA

Oct. 20, 2008

Vitaly Shneidman, Senior University Lecturer,Physics, NJIT

Title TBA

Oct. 13, 2008

Gordon Thomas, Professor, Physics, NJIT
Biophysics devices for medical applications

Oct. 6, 2008

Special Time: 4-5 pm
Sigurd Wagner, Professor,
Electrical Engineering,
Princeton University

Title TBA

Sept. 29, 2008

Andrei Sirenko, Assoc. Professor, Physics, NJIT
Applications of synchrotron radiation for materials studies: from GaN nanostructures to nanocheckerboards
Room: 373 TiernanTime: Noon-1 pm with 11:30 am tea time

Abstract:

Modern nanoelectronics is progressing from the planar epitaxial growth-based technology towards monolithic integration of multifunctional structures with complementary optical and electronic properties. Nanoscale selective area growth (NSAG) is a powerful technique for such integration, which holds a promise to improve both the optical properties and structural quality of the grown materials, and GaN-based device compounds in particular. A detailed analysis of the fundamental growth mechanisms and how they affect the structural and optical properties of the GaN-based NSAG structures is important for their industrial applications.

The adequate characterization tools, such as synchrotron radiation based submicron-beam high-resolution x-ray diffraction (HRXRD), are required to support the current trends in monolithic materials integration. Here I will present our recent characterization results obtained with a nondestructive HRXRD technique and reciprocal-space-mapping (RSM) analysis with the x-ray beamsize of 240 nm [1]. Our HRXRD experiments have been carried out at two synchrotron facilities: at A2 beamline at CHESS equipped with a one-bounce focusing capillary optics and at the APS 2ID-D microscope beamline equipped with a phase zone plate. Materials and structural properties, such as thickness, strain, composition variation, and details of precursor surface migration have been determined for various NSAG ridge structures with active regions consisted of InGaN/GaN multiple-quantum-wells (MQW) [2,3].

[1] A. A. Sirenko, A. Kazimirov, A. Ougazzaden, S. O’Malley, D. H. Bilderback, Z.-H. Cai, B. Lai, R. Huang, V. Gupta, M. Chien, S.N.G. Chu,  Appl. Phys. Lett. 88, 081111 (2006).

[2] A. A. Sirenko, A. Kazimirov, S. Cornaby, D. H. Bilderback, B. Neubert, P. Brückner, F. Scholz, V. Shneidman, and A. Ougazzaden,  “Microbeam high-angular resolution x-ray diffraction in InGaN/GaN selective-area-grown ridge structures”, Appl. Phys. Lett. 89, 181926 (2006).

[3] P. L. Bonanno, S. M. O’Malley, A. A. Sirenko, A. Kazimirov, Z.-H. Cai, T. Wunderer, P. Brückner, and F. Scholz, “Intra-facet migration effects in InGaN/GaN MQW structures grown on triangular GaN ridges studied by submicron beam X-ray diffraction, Appl. Phys. Lett. 92, 123106 (2008).

Sept. 22, 2008

Kunihiro Keika,
Postdoctoral fellow,
Space Research Institute,
Austrian Academy of Sciences

A Remote Sensing Study on the Dynamics of Energetic Ions in the Earth's Magnetosphere

Wednesday, Sept. 10, 2008 - 2 pm to 4 pm
406 Tiernan Hall

Body- Mind culturing for Human Excellence

Human beings have evolved after millions of years of evolution of living beings on this planet. We are thus the culmination of the experimentation of Nature over such a long period and so have wonderful physical and mental powers.  Again, human beings,  by performing research, have been able to tap into some of our latent powers. But there are still great untapped powers within us which are yet to be understood and nurtured fully.

In this lecture, powers of Bio-Magnetism, Life force, Mind and Body will be explained and a revolutionary, comprehensive and yet a very simple system of enhancing these powers will be outlined which would totally transform our lives.

A demonstration of Bio-Magnestism will be given. You can experience this fundamental energy or force in you and learn how to use it fruitfully, profitably whatever be your goal in life.

A lecture/ demonstration will be given by a Senior Professor of World Community Service Centre, India - Mr. G. Balachandran and his team who are on a tour covering New Zealand, Australia, Korea, Japan, USA and Canada.

Retirement Party

The pleasure of your company is requested at a luncheon in honor of:

Dr. Leon Buteau celebrating 44 years of service!

Wednesday, June 18, 2008 12 noon - 2:00 pm Campus Ballroom B

The cost is: $25.00 per-person (includes gift)
Please RSVP/PAY by June 16
Frances Bowen - fmayo@njit.edu or X3562 Physics Department, 463 Tiernan Hall

Monday, May 5, 2008

Biophysics using Raman Spectroscopy
Dr. Aysegul Ergin,
Boston University (Biophysics, Host: Thomas)
Room: 373 TiernanTime: Noon-1 pm with 11:30 am tea time

Abstract:

Raman spectroscopy is a technique that employs the scattering of afrequency-shifted optical signal. Although this phenomenon was first observed 80 years ago, in the last few decades with the development of modern instrumentation, the technique has found increased use in many medical, pharmaceutical, chemical and polymer companies. In this talk, some examples of common confocal Raman applications in medical/pharmaceutical industries will be briefly discussed. In addition to that, the experiments and the results of a biophysics/biomedical engineering project from NJIT to develop a non-invasive, compact confocal Raman instrument to determine the glucose concentration in blood using the Raman spectrum from the aqueous humour of a person's eye will be summarized.

Monday, April 28, 2008

Electropolymeric Display and Window TechnologyDr. Elliott Schlam, New Visual Media Group, LLCEatontown, New Jersey (Materials / Device Physics, Host: Levy)Room: 373 Tiernan

Time: 3-4 pm with 2:30 pm tea time *** NOTE SPECIAL TIME ***

Abstract:Thin metallized polymer foils can be made to function as large scaleMEMS devices. Distinct from traditional Si MEMS devices, the movingelement is actually the polymer foil itself. The polymer can befabricated into an array of small pixel-like shutters to create largeflat panel displays for low cost digital billboards or can beincorporated between the panels of a thermal window to create adynamic window shade for considerable energy savings in residentialand commercial buildings.

Monday, March 31, 2008

Title: Solar Coronal Magnetic Fields: Source of Space Weather
Dr. Thomas Weigelmann, Max Planck Institute, Germany
(Solar & Terrestrial Physics, Host: Wang)
Room: 373 Tiernan

Time: Noon-1 pm with 11:30 am tea time

Abstract:

Instabilities in the solar corona like flares and coronal mass ejections can cause harmful effects, e.g., power cut-offs, damage to satellites and thread exposure of astronauts to energetic particles. It is therefore important to investigate these processes, in particular with aim of a better prediction of eruptive phenomena. The key for these processes is the magnetic field, which couples the solar interior with the solar atmosphere and dominates all other forces by several orders of magnitude in the corona. As high accuracy direct measurements of the coronal magnetic field are not available, we extrapolate ground based and space-born measurements of the photospheric magnetic field vector into the corona. Time series of the reconstructed 3D-magnetic field and plasma equilibria are analysed, for example regarding the amount of free energy available to trigger coronal eruptions, which are the cause of space weather.

Gleb ShtengelHoward Hughes Medical InstituteInterferometric fluorescent super-resolution microscopy of 3D cellular ultrastructure

Understanding molecular-scale architecture of cells requires determination of 3D locations of specific proteins with accuracy matching their nanometer-length scale. We introduce interferometric photoactivated localization microscopy (iPALM), the combination of photoactivated localization microscopy with single-photon, simultaneous multiphase interferometry that provides sub-20-nm 3D protein localization with optimal molecular specificity.  We demonstrate measurement of the 25-nm microtubule diameter, resolve the dorsal and ventral plasma membranes, and visualize the arrangement of integrin receptors within endoplasmic reticulum and adhesion complexes, 3D protein organization previously resolved only by electron microscopy.  iPALM thus closes the gap between electron tomography and light microscopy, enabling both molecular specification and resolution of cellular nanoarchitecture.

Monday, April 6, 200912 pm - 1pm, 408 FMH.

Prof. Andrew HillDepartment of Biology, NJIT

The effect of prenatal nicotine exposure on postnatal development of the respiratory rhythm|Nicotine in the form of maternal smoking and environmental tobacco smoke may represent the single most important neurotoxicant to affect fetal development.  The goal of this work is to understand how prenatal nicotine exposure affects the postnatal development of the respiratory rhythm.  Using an animal model, we will test the hypothesis that prenatal nicotine exposure leads to developmental defects of the serotonergic system of the brainstem, which may, in turn, affect the ability of the brainstem to respond appropriately with protective reflexes to changes in O2 and CO2 tension. 

Monday, March 30, 2009
from 12.30-1pm 408 FMH.   Please note the new time for this seminarProf. Mitra Shojania-FeizabadiPhysics Department, Seton HallCancer Study from Modeling and Theoretical to the ExperimentalDuring this talk, I will discuss the cancer study from three different perspectives.  I will start with modeling of a tumor interacting with anti-mitotic drugs.Next, I will discuss the microtubules as a key component of cytoskeleton responsible for the cell division and its mechanism to find a chromosome as atarget to proceed the mitosis.  Lastly, I will discuss the importance of investigating the rigidity of microtubules in cancerous cells.