Procter & Gamble Analytical Chemistry Seminar Series

Seminars are Wednesdays at 230 PM in 102 Chemistry Building unless otherwise noted.
Refreshments are served at 215 PM.



PhD student exit and some special seminars are on Fridays at 4 PM in 102 Chemistry Building.
Exit seminars are color-coded blue.
Second year student talks are color-coded in green.

Related seminars and their locations are included when possible, and are color-coded in purple.

This information is kept up to date at: http://www.nano.psu.edu/~psw/AChem0607.html

Skip to the next talk.

Seminars

Wednesday 20 September 2006, 230 PM
Shigeru Amemiya
Chemical Imaging of Nanostructured Interfaces by Scanning Electrochemical Microscopy

References for Chem 500:
S. Amemiya, J. Guo, H. Xiong, and D. A. Gross, "Biological applications of scanning electrochemical microscopy: Chemical imaging of single living cell and beyond," Anal. Bioanal. Chem. ASAP (2006) (DOI 10.1007/s00216-006-0510-6).
H. Xiong, J. D. Guo, K. Kurihara, and S. Amemiya, "Fabrication and characterization of conical microelectrode probes templated by selectively etched optical fibers for scanning electrochemical microscopy," Electrochem. Commun. 2004, 6, 615–620.
J. Guo, and S. Amemiya, "Permeability of the nuclear envelope at isolated Xenopus oocyte nuclei studied by scanning electrochemical microscopy," Anal. Chem. 2005, 77, 2147–2156.
H. Xiong, D. A. Gross, J. Guo, and S. Amemiya, "Local feedback mode of scanning electrochemical microscopy for electrochemical characterization of one-dimensional nanostructure: Theory and experiment with nanoband electrode as model substrate," Anal. Chem. 2006, 78, 1946–1957.

(Host: Andrew Ewing, x3-4653 )

Friday 22 September 2006, 1230 PM in 102 Chemistry Building (NOTE SPECIAL DAY and TIME AND ROOM CHANGE!)
Prof. Ken-ichi Sugiura, Tokyo Metropolitan University
The Longest Precise Conjugated Molecules Ever Synthesized
(Host: Paul Weiss, x5-3693 )

Wednesday 18 October 2006, 400 PM NOTE SPECIAL TIME
Seung-Hyun (Anna) Lee (Mallouk Group; Committee members: Craig Grimes, Karl Mueller, and Nick Winograd)
Vesicle-Encapsulated Ribozymes

and

Carl Myers (Williams Group; Committee members: Marty Bollinger, Andy Ewing, and Mike Green)
Controllable Microarray Replication Using DNA

Wednesday 25 October 2006, 230 PM
Monique Makos (Ewing Group; Committee members: Kyung-An Han, Erin Sheets, and Nick Winograd)
Surface Plasmon Resonance Using Optical Fibers

and

Meaghan Andes (Keating Group; Committee members: Peter Butler, Andrew Ewing, and Nick Winograd)
Microfluidics for Blood Analysis

Wednesday 1 November 2006, 230 PM
Dan Mao (Winograd Group; Committee members:)
Surface Plasmon Resonance Imaging: Walk Into the Biomolecular Interactions

and

Donna Omiatek (Ewing Group; Committee members: Chris Keating, Nick Winograd, and Ryan Clement)
Microwave Accelerated Metal-Enhanced Fluorescence

Wednesday 8 November 2006, 230 PM
Sang Bok Lee
Department of Chemistry and Biochemistry, University of Maryland
Designer Nanoparticles: Nanotubes, Application from Nano-Bio Medicine to Electronics
(Host: Tom Mallouk, x3-9637 )

Chemistry 500 References:
"Magnetic Nanotubes for Magnetic-Field-Assisted Bioseparation, Biointeraction, and Drug Delivery," Sang Jun Son, Jonathan Reichel, Bo He, Mattan Schuchman, and Sang Bok Lee, J. Am. Chem. Soc. 2005, 127, 7316-7317.
"Nanotube-Based Ultrafast Electrochromic Display," Seung Il Cho, Won Jong Kwon, Shin-Jung Choi, Philseok Kim, Sun-Ah Park, Jonggeol Kim, Sang Jun Son, Rui Xiao, Sang-Ho Kim, and Sang Bok Lee, Advanced Materials 2005, 17, 171-175.

Additional References:
"Shape-Coded Silica Nanotubes for Biosensing, Bo He, Sang Jun Son, and Sang Bok Lee," Langmuir 2006, 22, 8263-8265.
"Electrochemical Synthesis and Ultrafast Electrochromics of Poly(3,4-ethylenedioxythiophene) Nanotubes in Flexible Substrate," Seung Il Cho, Dong Hwa Choi, Sang-Ho Kim, Sang Bok Lee, Chemistry of Materials 2005, 17, 4564-4566.
"Observing Capillarity in Hydrophobic Silica Nanotubes," Karthik Jayaraman, Kenji Okamoto, Sang Jun Son, Charles Luckett, Azeem H. Gopalani, Sang Bok Lee, and Douglas S. English, J. Am. Chem. Soc. 2005, 127, 17385-17392.

Thursday 9 November 2006, Chemical Engineering Colloquium, 108 Wartik Laboratory, 1130 AM
C. Daniel Frisbie
Department of Chemical Engineering and Material Science University of Minnesota
Organic Thin Film Electronics: A Materials Engineering Perspective

In the last 10 years substantial progress has been made in the development of p-conjugated organic semiconductor materials as an alternative to amorphous silicon for low cost, thin film electronics. The attractive properties of organic semiconductors – low temperature processability, efficient electroluminescence, and reasonable charge carrier mobilities - have led to expectations of a new ‘plastic’ electronics with applications ranging from flexible flat panel displays and smart cards to energy efficient lighting and low cost solar cells. The ultimate success of plastic electronics depends on many factors, some technological and some economic. However, from a materials engineering standpoint, there is a need for further performance improvements and achieving this depends upon a comprehensive understanding of structure-property relationships in organic semiconductors. This talk will describe multi-investigator efforts at Minnesota to develop crystalline organic semiconductors for thin film transistors (TFTs) and to understand structure-transport relationships in these devices with an eye toward further improvements. We have developed a four-pronged strategy for the optimization of OTFTs, namely (1) synthesis of new semiconducting materials; (2) fabrication and testing of OTFT devices; (3) visualization of charge transport bottlenecks by high resolution scanning probe methods; and (4) experimental and theoretical determinations of electronic structure. This talk will touch on each of these components and will emphasize recent success we have had in developing new n-channel organic semiconductors. Topics covered will include semiconductor film growth, structure characterization by X-ray diffraction and atomic force microscopy, device I-V characteristics, stability, carrier trapping, and O2/H2O sensitivity. We will also compare the performance of our materials to the current benchmarks, pentacene and poly(3-hexylthiophene). A recurrent theme is understanding the effect of structure at all length scales- including molecular structure, crystal packing, and film morphology- on critical OTFT parameters such as the charge mobility, the threshold voltage for conduction, and the on-to-off current ratio.

Wednesday 15 November 2006, 230 PM (AVS San Francisco Week and AIChE Meeting)
Ajeet Kumar (Weiss Group; Committee members: John Badding, Will Castleman, and Seong Kim)
On-Chip Optofluidic Devices
and

Stacey Lynn Dean (Keating Group; Andrew Ewing, Tom Mallouk, and Carlo Pantano)
Detection of Toxic Gases Using Mesoporous Metal Oxides

Wednesday 22 November 2006
No seminar

Wednesday 29 November 2006, 230 PM (MRS Boston Week)
Steven Baldelli, Department of Chemistry, University of Houston
Sum Frequency Generation Spectroscopy and Imaging of Surfaces
(Hosts: Dave Allara, Seong Kim, and Paul Weiss, x5-3693 )

References for Chem 500:
Sum Frequency Generation Microscopy of Microcontact-Printed Mixed Self-Assembled Monolayers, Katherine Cimatu and Steven Baldelli, J. Phys. Chem. B 2006, 110, 1807-1813.
Preparation of Alkanethiol Monolayers on Mild Steel Surfaces Studied with Sum Frequency Generation and Electrochemistry, Hongping Zhang, Casey Romero, and Steven Baldelli, J. Phys. Chem. B 2005, 109, 15520-15530.

Wednesday 6 December 2006, 230 PM
Theresa Reineke, University of Cincinnati
Glycopolymers for Cellular Drug Delivery and Imaging
(Host: Chris Keating, x3-4653 )

Friday 8 December 2006, 400 PM
Caleb Strepka (Mueller Group; Committee members: Alan Benesi, Will Castleman, Jim Kubicki)
Neutron Diffraction

and

Kristin Cederquist (Keating Group; Committee members: Jim Adair, Phil Bevilacqua, and Andy Ewing)
The Use of Conjugated Polyamidoamine Dendrimers as Anti-Cancer Agents

Wednesday 13 December 2006, 230 PM
Lukas Tamm, Department of Molecular Physiology and Biological Physics, University of Virginia
Tracking single proteins and lipids in engineered supported membranes

Reference for Chem 500: Tamm et al., Biophysical Journal (2006), in press (full citation information to follow)

(Host: Erin Sheets, x3-0044 )

Wednesday 17 January 2007, 230 PM
Emil Hernández (Mallouk Group; Committee members: John Badding, Mark Maroncelli, and Joan Redwing)
A Label-Free Immunosensor Based on SiO2

and

Melissa Passarelli (Winograd Group; Committee members: TC Chung, Andy Ewing, Barbara Garrison)
TBA

Wednesday 24 January 2007, 230 PM
Prof. James Adair, Department of Materials Science and Engineering, Penn State University
Nanocomposite Inorganic-Organic Colloids for Bioimaging, Bioassays and Drug Delivery

Wednesday 14 February 2007, 230 PM

Amanda Bressler (Andrews Group; Committee members: Chris Keating, Andy Ewing, and Kyung-An Han)
Concentration Profiling of Drugs in Animal Tissue Using High-Resolution Magic-Angle Spinning NMR Spectroscopy
and

Daniel A. Brenes

Wednesday 7 March 2007, 230 PM
Mike Ibele (Sen Group; Committee members: Chris Keating, Seong Kim, and Tom Mallouk)
Near-Field Scanning Optical Microscopy and its Application to the Fluorescent Detection of Single Molecules

Wednesday 21 March 2007, 230 PM
Craig Aspinwall, University of Arizona
Polymerized Phospholipid Membranes for Chemical Sensing and Separations
(Host: Chris Keating, x3-4653 )

Friday 30 March 2007, 1230 PM - NOTE DAY AND SPECIAL TIME!
SACP Lecture Prof. Gang-yu Liu, Department of Chemistry, UC Davis
A Nanoengineering Approach to Investigate Polyvalent Biochemical Interactions
(Host: Paul Weiss, x5-3693 )

New engineering protocols have been developed to position organic and biomolecules on surfaces with nanometer to molecular precision to produce nanostructures with designed geometry and size. While microfabrication techniques allow production of protein or DNA patterns with micrometer dimension, selectively patterning and immobilizing proteins with molecular precision remains an obstacle. This presentation will introduce advanced nanofabrication methods using scanning probe microscopy such as scanning tunneling microscopy (STM) and atomic force microscopy (AFM). Topics will include the fabrication principles, tip-molecular interactions, and various nanostructures produced, one of which is shown in the figure below. Two applications of this nanotechnology in polyvalent biochemical interactions will also be discussed: the study of hypersensitivity reactions of immune systems, and the investigation of the initial HIV infection processes.

Liu has established a Spectral Imaging Facility including a state-of-the-art combined atomic force microscope with a scanning laser confocal microscope (First in the US, supported by NSF-MRI). This new equipment enables high-resolution and 3D imaging of biospecimen including cells and tissues. An example image of a mast cell is shown above, where the cell membrane become rough upon activation.

Wednesday 11 April 2007, 230 PM
James Burgess, Department of Chemistry, Case Western Reserve University
Direct Electrochemical Evaluation of Plasma Membrane Cholesterol at Single Cells and Tissue: Disease State Alterations of Intracellular Traffic”

(Host: Mary Beth Williams/A>, x5-8859 )

Wednesday 25 April 2007, 230 PM
Teri Odom, Department of Chemistry, Northwestern University
Manipulating Light at the Nanoscale with Plasmonic Structures
(Host: TJ Mullen, x3-8220 )

Friday 4 May 2007, 230 PM NOTE SPECIAL DAY!
Bhavik Anil Patel, Department of Bioengineering, Imperial College London
In Vitro Monitoring of Serotonin Release from Enterochromaffin Cells: A Means to Understanding Gastrointerinal Function

(Hosts: Anne Andrews, x5-2970 and Paul Weiss, x5-3693 )

Enterochromaffin (EC) cells play a key role within the enteric nervous system. EC cells function as sensory transducers that respond to mechanical or chemical stimulation of the mucosa by releasing serotonin. Serotonin then acts on mucosal endings of enteric primary afferent neurons and extrinsic primary afferent neurons to initiate motor reflexes and intestinal sensation. Development of stable and reliable techniques for measurement of serotonin would be of great value in understanding the normal physiology of EC cells and their contribution to control of gastrointestinal function and visceral perception.

Serotonin is easily oxidized and thus can be detected using electrochemical methods. However, a major complication with stable detection of serotonin in vitro or in vivo is the rapid electrode fouling that occurs caused by adsorbed reaction products. To overcome this problem we have used boron-doped diamond (BDD) microelectrodes which help to overcome fouling effects compared to conventionally used carbon fibre microelectrode.

In this presentation the response of the BDD microelectrode compared to carbon fiber microelectrodes for the detection of serotonin will be shown. The response of the sensor to detect serotonin overflow from EC cells will be studied, and a variety of stimulus will be shown to increase overflow. The comparison of serotonin release observed from neonatal to adult animals will be investigated to understand the role the neurotransmitter plays during development.


Speakers to be scheduled (hosts):


Students to be scheduled:
Shawn Parry (Winograd Group, exit seminar)

Students scheduled:
Meaghan Andes (Keating Group; Committee members:)
Dan Brenes (Winograd Group)
Amanda Bressler (Andrews Group; Committee members: Chris Keating, Andy Ewing, and Kyung-An Han)
Kristin Cederquist -- December or January
Stacey Lynn Dean (Keating Group; Andrew Ewing, Tom Mallouk, and Carlo Pantano) -- October/November
Emil Hernández (Mallouk Group; Committee members: John Badding, Mark Maroncelli, and Joan Redwing)
Mike Ibele (Sen Group; Committee members: Chris Keating, Seong Kim, and Tom Mallouk)
Ajeet Kumar (Weiss Group; Committee members: John Badding, Will Castleman, Seong Kim)
Seung-Hyun (Anna) Lee (Mallouk Group; Committee members: Craig Grimes, Karl Mueller, and Nick Winograd)
Monique Makos (Ewing Group; Committee members: Kay Han, Erin Sheets, and Nick Winograd) -- 25 or 18 October
Dan Mao (Winograd Group) -- November 1
Carl Myers (Williams Group; Committee members: Marty Bollinger, Andy Ewing, and Mike Green)
Donna Omiatek (Ewing Group; Committee members: Chris Keating, Nick Winograd, and Ryan Clement)
Melissa Passarelli (Winograd Group; Committee members: TC Chung, Andy Ewing, Barbara Garrison)
Caleb Strepka (Mueller Group; Committee members: Alan Benesi, Will Castleman, Jim Kubicki) -- December

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27 April 2007
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