Biological Chemistry seminar: Amanda E. Hargrove, Duke University

Thu, 2019-01-24 15:00
Location: 

Carolyn Hoff Lynch Room

Topic:  lncRNA

Host:  Dr. David Chenoweth

Biological Chemistry seminar: Jake Hooker, Harvard University

Thu, 2019-01-17 15:00
Location: 
Carolyn Hoff Lynch Room Host: Dr. David Christianson

Topic:  Molecules for human imaging

Host:  Dr. David Christianson

Biological Chemistry seminar: Karim-Jean Armache, New York University

Thu, 2018-12-06 15:00
Location: 
Carolyn Hoff Lynch Room
Topic: Chromatin structure

Biological Chemistry seminar: Abhinav Nath, University of Washington

Thu, 2018-11-01 15:00
Location: 

Carolyn Hoff Lynch Room

Topic: Protein molecular dynamics and health

Host: Dr. Elizabeth Rhoades

Biological Chemistry seminar: Kabirul Islam, University of Pittsburgh

Thu, 2018-10-18 15:00
Location: 

Carolyn Hoff Lynch Room

Topic: Chemical epigenetics

Host: Dr. E. James Petersson

Biological Chemistry seminar: Mya Suong, Johns Hopkins University

Thu, 2018-10-11 15:00
Location: 
Carolyn Hoff Lynch Room

Topic:  Single cell gene expression

Inorganic Chemistry Seminar: Dr. David Goldberg, Johns Hopkins University

Tue, 2019-02-26 12:00 - 13:00
Speaker: 
Dr. David Goldberg
Location: 

Carol Lynch Lecture Hall

Chemistry Complex

Host: Tomson

Title & Abstract TBA

inquires rvargas@sas.upenn.edu

Organic Chemistry Seminar: Dr. Andrew McNally, Colorado State University

Mon, 2018-11-12 12:00 - 13:00
Speaker: 

Dr. Andrew McNally

Location: 

Carol Lynch Lecture Hall

Chemistry Complex

Host: Dr. Walsh

Title & Abstract TBA

inquires rvargas@sas.upenn.edu

Inorganic Chemistry Seminar: Dr. Amy Prieto, Colorado State University

Tue, 2018-10-16 12:00 - 13:00
Speaker: 

Dr. Amy Prieto

Title "Inexpensive, Efficient Approaches for Energy Production and Storage"

 

 We are interested in developing new synthetic methods for nanoscale materials with applications in energy conversion and storage. For this talk, I will focus first on using photovoltaic devices to produce energy, and in particular the synthesis and characterization of Cu2ZnSnS4 nanoparticles. The structure-property relationships for these particles can be significantly modified as the metal and chalcogen stoichiometries are tuned.  Second, I’ll discuss our efforts to develop new architectures for rechargeable Li-ion batteries for storing that energy. We are working to incorporate high surface area structures of a novel anode material into a new battery architecture wherein the current collector is conformally coated with an electrolyte made by electrochemical deposition, then surrounded by the cathode electrode. The significant advantage is that the diffusion length for Li+ between the cathode and anode will be dramatically reduced, which should lead to much faster charging rates. The general theme between both topics is the development of new synthetic methods for useful materials with an eye toward non-toxic, earth abundant chemicals and reasonable manufacturing methods.

 

 

M. C. Schulze, R. K. Schulze, A. L. Prieto "Electrodeposited thin-film CuxSb anodes for Li-ion batteries: Enhancement of cycle life via tuning of film composition and engineering of the film-substrate interface" J. Mater. Chem. A20186, 12708-12717.


 

M. Braun, L. Korala, J.  M. Kephart, and A. L. Prieto, “Synthetic Control of Quinary Nanocrystals of a Photovoltaic Material: The Clear Role of Chalcogen Ratio on Light Absorption and Charge Transport for Cu2ZnSn(S1-xSex)4”, ACS Appl. Energy Mater.2018 1(3), 1053-1059.


 

Location: 

Carol Lynch Lecture Hall

Chemistry Complex

Host: Dr Goldberg

inquires rvargas@sas.upenn.edu

Physical Chemistry Seminar, Dr. Sanat Kumar, Columbia University

Thu, 2018-10-11 13:00 - 14:00
Speaker: 

Dr. Sanat Kumar

"Polymer-Grafted Nanoparticle Membranes with Controllable Free-Volume"

 

-Polymer based membranes play a key role in several industrially important gas separation technologies, e.g., removing CO2 from natural gas, with enormous economic and environmental impact. Baker advocates the development of novel membrane architectures since current, pure polymer membranes only offer limited systematic pathways for improvement. Here, we develop a novel hybrid membrane construct comprised entirely of nanoparticles grafted with polymers. These membranes are shown to have broadly tunable separation performance through variations in graft density and chain length. Computer simulations show that the optimal NP packing forces the grafted polymer layer to distort, yielding regions of measurably lower polymer density. Multiple experimental probes confirm that these materials have the predicted increase in “polymer free volume”, which explains their improved separation performance. These polymer-grafted NP materials thus represent a new template for rationally designing membranes with desirable separation abilities, coupled with improved aging characteristics in the glassy state and enhanced mechanical behavior.
Location: 
Carol Lynch Lecture Hall Chemistry Complex

Host: Dr. Fakhraai

 

inquires rvargas@sas.upenn.edu

 

Department of Chemistry

231 S. 34 Street, Philadelphia, PA 19104-6323

215.898.8317 voice | 215.573.2112 fax | web@chem.upenn.edu

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