UNIVERSITY OF PITTSBURGH THE
Experimental and Theoretical Investigations of Electrostatic Interactions and Ordering in Highly Charged Colloidal Assemblies
We aim to unveil the form of the fundamental electrostatic interactions by direct measurements of electrostatic interactions using Colloidal Probe Atomic Force Microscopy on concentrated, highly charged colloidal particle dispersions. We will examine the charge induced self-assembly of these particles into fcc crystalline colloidal arrays (CCA) by monitoring diffraction from the CCA, which will give information on the depth of the potential wells that define the fcc lattice ordering. These experimental results will be rationalized by theoretical calculations that model colloidal particle interactions in high concentration, highly charged article dispersions.
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| AWARD OVERVIEW |
| Award Number |
848265 |
Funding Agency |
National Science Foundation |
| Total Award Amount |
$750,000 |
Project Location - City |
Pittsburgh |
| Award Date |
07/02/2009 |
Project Location - State |
PA |
| Project Status |
More than 50% Completed |
Project Location - Zip |
15213-2303
|
| Jobs Reported |
3.00 |
Congressional District |
14 |
| Project Location - Country |
US |
|
|
Recipient Information
(Grants)
| Recipient Information (Grants) |
|
Recipient Name
|
UNIVERSITY OF PITTSBURGH THE |
| Recipient DUNS Number |
004514360
|
| Recipient Address |
3520 FIFTH AVE |
| Recipient City |
PITTSBURGH |
| Recipient State |
Pennsylvania |
| Recipient Zip |
15213-3320 |
| Recipient Congressional District |
14 |
| Recipient Country |
USA |
Required to Report Top 5
Highly Compensated Officials |
No |
Projects and Jobs Information
| Projects and Jobs Information |
| Project Title |
Experimental and Theoretical Investigations of Electrostatic Interactions and Ordering in Highly Charged Colloidal Assemblies |
| Project Status |
More than 50% Completed |
| Final Project Report Submitted |
No |
| Project Activities Description |
Fundraising, Grants & Financial Support |
| Quarterly Activities/Project Description |
We have modeled 3D colloidal crystal arrays (CCA) which are highly ordered arrays of like charged colloidal particles with an effective interaction potential DLVO (screened-Coulomb interaction) in which the Coulomb repulsion is screened exponentially by the surrounding ions. The structure of the systems has been analyzed via Voronoi analysis.
Several sets of DLVO parameters and two packing fractions (close to experimental values employed in the Asher group's experiments) have beenexamined: the results of Langevin dynamics simulations of these systemshave been analysed in order to study the ordering/melting process for CCA.This phase behavior have been studied using Voronoi polygons volumes and the number of faces. |
| Jobs Created |
3.00 |
| Description of Jobs Created |
Prime recipient retained two Graduate Student Researchers, a Research Assistant Professor, and a Postdoctoral Associate. |
Purchaser Information
(Grants)
| Purchaser Information |
| Contracting Office ID |
Not Reported |
| Contracting Office Name |
Not Available |
| Contracting Office Region |
Not Available |
| TAS Major Program |
49-0101 |
| Award Information |
| Award Date |
07/02/2009 |
| Award Number |
848265 |
| Order Number |
|
| Award Type |
Grants |
| Funding Agency ID |
49 |
| Funding Agency Name |
National Science Foundation |
| Funding Office Name |
Not Available |
| Awarding Agency ID |
49 |
| Awarding Agency Name |
National Science Foundation |
| Amount of Award |
$750,000 |
| Funds Invoiced/Received |
$591,911 |
| Expenditure Amount |
$603,289 |
| Infrastructure Expenditure Amount |
$0 |
| Infrastructure Purpose and Rationale |
N/A |
| Infrastructure Point of Contact Name |
Not Reported |
| Infrastructure Point of Contact Email |
Not Reported |
| Infrastructure Point of Contact Phone |
Not Reported |
| Infrastructure Point of Contact Address |
Not Reported |
| Infrastructure Point of Contact City |
Not Reported |
| Infrastructure Point of Contact State |
Not Reported |
| Infrastructure Point of Contact Zip |
Not Reported |
Product or Service Information
(Grants)
| Product or Service Information |
| Primary Activity Code |
**F |
| Activity Description |
Fundraising, Grants & Financial Support |
| Sub-Awards Information |
| Sub-awards to Organizations |
0 |
| Sub-award Amounts to Organizations |
$0 |
| Sub-Awards to Individuals |
0 |
| Sub-Award Amounts to Individuals |
$0 |
| Number of Sub-awards less than $25,000/award |
0 |
| Amount of Sub-awards less than $25,000/award |
$0 |
| Number of payments to vendors greater than $25,000 |
0 |
| Total Amount of payments to vendors greater than $25,000/award |
$0 |
| Number of payments to vendors less than $25,000/award |
98 |
| Total Amount of payments to vendors less than $25,000/award |
$17,789 |
| Location Information |
| Latitude, Longitude |
40º 26' 38",
-79º 57' 22" |
| Congressional District |
14 |
| Address 1 |
|
| Address 2 |
|
| City |
Pittsburgh |
| County |
Allegheny |
| State |
PA |
| Zip |
15213-2303 |
|
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