LSM - Seminars: March 2009 Archives

Seminars Archives

February 2009 | March 2009 | April 2009

Tuesday, March 03, 2009
Twenty-Third Annual Symposium of the Laboratory for Surface Modification Tuesday, March 3, 2009 Fiber Optics Auditorium Busch Campus Congratulations to our student prize winner! Graduate student Adina Luican, working with Prof. Eva Y. Andrei, won the prize for best student poster: "Scanning tunneling microscopy and spectroscopy on graphene flakes on graphite." Adina received a certificate and $150 in prize money. The program will include invited "Highlight Presentations" from two speakers: Louis Brus, Department of Chemistry, Columbia University Richard Haight, IBM T.J. Watson Research Laboratory This meeting provides an excellent opportunity for Rutgers graduate students and postdocs to present their work in a friendly atmosphere. Of course, faculty members are welcome to speak as well. This year we are offering a * STUDENT PRIZE of $150 * for the best the Poster Presentation. Any student selected for an oral presentation will be welcome to present a poster as well. Note that the prize will be awarded to the first author listed for the presentation.

Tuesday, March 03, 2009

Twenty-Third Annual Symposium of the Laboratory for Surface Modification
Tuesday, March 3, 2009
Fiber Optics Auditorium
Busch Campus

Congratulations to our student prize winner! Graduate student Adina Luican, working with Prof. Eva Y. Andrei, won the prize for best student poster: "Scanning tunneling microscopy and spectroscopy on graphene flakes on graphite." Adina received a certificate and $150 in prize money.

The program will include invited "Highlight Presentations" from two speakers:

Louis Brus, Department of Chemistry, Columbia University
Richard Haight, IBM T.J. Watson Research Laboratory

This meeting provides an excellent opportunity for Rutgers graduate students and postdocs to present their work in a friendly atmosphere. Of course, faculty members are welcome to speak as well.

This year we are offering a *** STUDENT PRIZE of $150 *** for the best the Poster Presentation. Any student selected for an oral presentation will be welcome to present a poster as well. Note that the prize will be awarded to the first author listed for the presentation.

Thursday, March 05, 2009
IAMDN Focus Session-No Seminar

Thursday, March 12, 2009
Second and third row transition metal phthalocyanine based organic photovoltaics Gary Kushto, Optical Sciences Division United States Naval Research Laboratory, Washington, DC 12:00 Noon, Chem. 260 Metallophthalocyanines (MPcs) have been studied extensively with respect to their role in small molecule-based organic photovoltaic devices (OPVs). Having reasonable hole mobilities, excellent chemically stabilities and high linear absorption coefficients across a large portion of the solar irradiance spectrum (~105 cm-1), these macroheterocycles make near ideal candidates for light harvesting layers in solar energy conversion. Although phthalocyanine complexes are known for nearly every metal in the periodic table, the phthalocyanines of copper and zinc are far and away the most commonly used p-type materials in small molecule OPV applications. It is clear that further investigation into the operational parameters of MPc-based OPVs is required. The present work will focus on OPVs fabricated using the phthalocyanine complexes of the groups 10 and 11 metals (Ni, Pd, Pt, Cu and Ag). By choosing phthalocyanine complexes of metals of a given column in the periodic table, we have a well defined subset of metal complexes that are chemically very similar (similar ground state electronic configurations), save the relative energetics of the metal d-orbitals and the frontier orbitals of the phthalocyanine ligand. A discussion of the excited state dynamics, carrier mobilities and frontier molecular orbital energetics of the groups 10 and 11 MPcs and how they correlate with the observed trends in the OPV device characteristics will be presented. Host: Eric Garfunkel and Alan Wan

Thursday, March 12, 2009

Second and third row transition metal phthalocyanine based organic photovoltaics
Gary Kushto, Optical Sciences Division
United States Naval Research Laboratory, Washington, DC
12:00 Noon, Chem. 260

Metallophthalocyanines (MPcs) have been studied extensively with respect to their role in small molecule-based organic photovoltaic devices (OPVs). Having reasonable hole mobilities, excellent chemically stabilities and high linear absorption coefficients across a large portion of the solar irradiance spectrum (~105 cm-1), these macroheterocycles make near ideal candidates for light harvesting layers in solar energy conversion. Although phthalocyanine complexes are known for nearly every metal in the periodic table, the phthalocyanines of copper and zinc are far and away the most commonly used p-type materials in small molecule OPV applications. It is clear that further investigation into the operational parameters of MPc-based OPVs is required. The present work will focus on OPVs fabricated using the phthalocyanine complexes of the groups 10 and 11 metals (Ni, Pd, Pt, Cu and Ag). By choosing phthalocyanine complexes of metals of a given column in the periodic table, we have a well defined subset of metal complexes that are chemically very similar (similar ground state electronic configurations), save the relative energetics of the metal d-orbitals and the frontier orbitals of the phthalocyanine ligand. A discussion of the excited state dynamics, carrier mobilities and frontier molecular orbital energetics of the groups 10 and 11 MPcs and how they correlate with the observed trends in the OPV device characteristics will be presented.

Host: Eric Garfunkel and Alan Wan

Thursday, March 19, 2009
Spring Break

Thursday, March 26, 2009
Two centuries of Fourier theorem: Its successes and enigmatic issues that are holding back the progress of physics! Prof. Chandrasekhar Roychoudhuri Department of Physics University of Connecticut, Storrs, CT 12:00 Noon Chem. 260 It is just over two hundred years that Joseph Fourier successfully introduced his powerful mathematical theorem in physics. It is one of the most pervasively productive and useful tool of physics and optics because its foundation is based on the superposition of harmonic functions and yet we have never declared it as a principle of physics, perhaps for valid reasons. And, yet there are a good number of situations where we pretend it to be the Principle of Superposition of physics, even though light beams pass through each other unperturbed. This has created epistemological problems of enormous magnitude. The purpose of this talk is to elucidate the problems while underscoring the roots of successes and the elegance of the theorem, which are not openly discussed. We will make our points by taking six major engineering fields of optics and show in each case why it works and under what restricted conditions by bringing in the relevant physics principles. The fields are (i) optical signal processing (diffraction), (ii) Fourier transform spectrometry (interference), (iii) classical spectrometry of pulsed light, (iv) coherence theory, (v) laser mode locking and (vi) pulse broadening. We underscore that mathematical Fourier frequencies, not being physical frequencies, cannot generate real physical effects on our detectors. Appreciation of this fundamental issue will open up new ways to be innovative in designing many new optical instruments. We underscore the importance of always validating our design platforms by emulating real working (interaction) processes in nature even though the real details may be “invisible” to our instruments. This talk summarizes activities published since 2003 in various places including a biannual SPIE conference series on “The nature of light: What is a photon?” [OPN Oct. Sp.Issue (2003); SPIE Proc.Vol.5866 (2005), Vol.6664 (2007), Vol.OP300 (2009) and CRC Press (2008)]

Thursday, March 26, 2009

Two centuries of Fourier theorem: Its successes and enigmatic issues that are holding back the progress of physics!
Prof. Chandrasekhar Roychoudhuri
Department of Physics
University of Connecticut, Storrs, CT
12:00 Noon
Chem. 260

It is just over two hundred years that Joseph Fourier successfully introduced his powerful mathematical theorem in physics. It is one of the most pervasively productive and useful tool of physics and optics because its foundation is based on the superposition of harmonic functions and yet we have never declared it as a principle of physics, perhaps for valid reasons. And, yet there are a good number of situations where we pretend it to be the Principle of Superposition of physics, even though light beams pass through each other unperturbed. This has created epistemological problems of enormous magnitude.

The purpose of this talk is to elucidate the problems while underscoring the roots of successes and the elegance of the theorem, which are not openly discussed. We will make our points by taking six major engineering fields of optics and show in each case why it works and under what restricted conditions by bringing in the relevant physics principles. The fields are (i) optical signal processing (diffraction), (ii) Fourier transform spectrometry (interference), (iii) classical spectrometry of pulsed light, (iv) coherence theory, (v) laser mode locking and (vi) pulse broadening. We underscore that mathematical Fourier frequencies, not being physical frequencies, cannot generate real physical effects on our detectors. Appreciation of this fundamental issue will open up new ways to be innovative in designing many new optical instruments. We underscore the importance of always validating our design platforms by emulating real working (interaction) processes in nature even though the real details may be “invisible” to our instruments. This talk summarizes activities published since 2003 in various places including a biannual SPIE conference series on “The nature of light: What is a photon?” [OPN Oct. Sp.Issue (2003); SPIE Proc.Vol.5866 (2005), Vol.6664 (2007), Vol.OP300 (2009) and CRC Press (2008)]

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