Silica-polypeptide Composite Particles
Paul S. Russo, Louisiana State University, DMR-0606117
Diffusion in complex systems.
4
3
←
Dialysis against salt
2
-7
1
Dialysis against water
Below: sequential growth of block copolypeptides with added
monomer, as revealed by static and dynamic light scattering.
0
0
200
400
600
800
1000
1200
1400
1600
110
Time/min
Overall Radius
Core Radius
100
PCBL
Monomer Added
90
SilicaPolypeptide
Composite
particles.
Radius/nm
Ds/10 cm s
2 -1
Diffusion of a model
polyelectrolyte can be
cycled up or down in a
dialysis fluorescence
photobleaching recovery
measurement cell.
Silica-polypeptide copolymer composite
particles: multiple functions in one neat
package.
PBLG
PCBL
80
PBLG
70
60
50
0
5
10
15
Days
↑
Polypeptide arms radiate from four silica-polypeptide
composite particles. A fifth reference particle (at about 10
o’clock) has no polypeptide on its surface, and is positively
identified by a cobalt nougat in its center.
20
25
30
Silica-polypeptide Composite Particles
Paul S. Russo, Louisiana State University, DMR-0606117
Education
Ph.D. Degree & Current Career Choice
Training
Jianhong Qiu (Colgate, New Jersey)
Graduate Students This Grant Supports
Erick Soto-Cantu (Mexico);
Derek Dorman (Mississippi); Brandon Curtiss (Louisiana)
Undergrads & Current Location
Cecile Pitot, University of Lyon (Engineer, South of France)
Jerome Koch, University of Lyon (returning to graduate 9/07)
Richard Rucker, Louisiana (continuing at LSU)
Ashley Cox, REU Intern (returning to U. So. Miss.)
Ryan McDonough, REU Intern (returning to Cleveland State U.)
Synergistic Activities, Paul S. Russo
REU Summer 2007 Interns Ryan
McDonough (Cleveland State Univ—Home
Advisor Kiril Streletzky) and Ashley Cox (U.
So. Miss—Home Advisor Robert Lochhead)
milling drain channels into protective
polyethylene sheets. This lab never misses
an opportunity to put tools into the hands
of students—including power tools.
LSU Polymer
Analysis
•Co-founder and member, Board of Directors, Louisiana
Applied Polymer Technology Extension Consortium (APTEC),
an inter-university one-stop-shopping economic development
tool. Current interest: incorporation and entrepreneurship
training, jointly with our sister university, Southestern.
•Member, Program Committee, Chemical Education
Foundation (Arlington, VA).
•Co-advisor (with C. Taylor) of Student Affiliates of the
American Chemical Society. This group undertook a major
rewrite of the Study Guide and also the Questions used in the
Chemical Education’s You Be The Chemist Challenge. The
YBTC Challengs is a “spelling bee” for chemists. This year
alone, 15 000 students studied from materials prepared by LSU
SAACS. See:
http://www.chemed.org/07NationalChall.html?mode=preview