The 2014 Spring Call for Proposals has closed. Notifications will be sent out in June.

The next call for proposals will be announced Sept 1, 2014. The database is currently open for Rapid Access Proposals. These should be limited in scope and have strong justification for expedited processing.

If you have recently been to CINT to work on your project, or are just finishing a project, please complete our CINT User Satisfaction Survey.

 

Mesoscale Science Frontiers Workshop

Please join us in Santa Fe, NM on May 13-16, 2014 for an excellent opportunity to learn the latest in multidiciplinary mesoscale science. Travel grants are available for students/postdocs who wish to present a poster.

Keynote lecture will be given by George Crabtree of Argonne National Laboratory.

Please see the website for more information. Registration is open now.

 

2014 User Meeting

The CINT 2014 User Meeting will take place September 22-23, 2014 at the historic La Fonda Hotel in Santa Fe, NM. As part of the meeting, we will be hosting the 6th International Workshop on Electromagnetic Metamaterials (IWEM-VI). Along with IWEM, we will have two concurrent symposia, one on Nanostructures in Polymers, and the other on nanomechanics.

More details and registration will be available in May.

 

 

 

Science Highlight:
Ionic Effects on the Behavior of Thermoresponsive PEO–PNIPAAm Block
Copolymers

The temperature-dependent aggregation and recovery of the copolymer poly(ethylene oxide)22-b-poly(N-isopropylacrylamide) 29 with a C12 end-cap in aqueous solutions of salts and acids are investigated. Salt solutions affected the critical aggregation temperature of the copolymer in a manner predictable
according to the Hofmeister series, with the kosmotropic adipic ion lowering the critical aggregation temperature and the chaotropic iodide raising it. Also, both salts and acids increased the size of copolymer aggregates formed with heating, due to the electrostatic shielding of aggregated structures provided by the electrolytes. Additionally, the presence of ionic additives caused a thermohysteretic increase in the size of copolymer aggregates with temperature cycling. The transitions of polymer structure with increasing temperature were surprisingly sharp with the C12 end-cap present, and particularly broad in samples in which the end cap had been cleaved.Block copolymers

This observation suggested that the hydrophobic end group was responsible for imparting some degree of order to the polymer at low temperatures, which allowed for rapid reconfiguration with increasing temperature. Finally, in addition to the transitions expected from the least critical solution temperature behavior of the polymer blocks, we have observed an unexpected additional transition which we attribute to the contraction of the poly(ethylene oxide) chains of the copolymer aggregates at higher temperatures. This work illustrates the importance of considering the environment and composition of thermoresponsive block copolymers in certain applications, particularly in solutions with even modest electrolyte concentrations (1–10 mM), as it can have a profound effect on transition temperatures and morphology.

 

 

Reference: Ian M. Henderson, Peter G. Adams, Gabriel A. Montano, Walter F. Paxton, "Ionic Effects on the Behavior of Thermoresponsive PEO–PNIPAAm Block", J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 507–516

Contact: Wally Paxton and Gabe Montano

 

CINT Videos

In response from user requests, we are starting to film a virtual tour of CINT.
Please check out this first installment of 
1. an introduction to CINT and 
2. Jen Martinez and the capabilities within the Biosuite at the Gateway facility.


 

 

 

 

 

 

 

Ed Flynn at Bradbury

Exhibit Open at the Bradbury Science Museum

This past summer, we opened an exhibit about CINT at the Bradbury Science Museum in Los Alamos. This is a permanent exhibit and will be up for many years. If you are in Los Alamos, please stop by and learn about nanoscience and the research going on at CINT. The exhibit focuses on our work with membrane based nanocomposites, metamaterials, nanowires and other energy concepts. There is also a profile on CINT user Ed Flynn of Senior Scientific and his work on creating nanoparticles for cancer detection.

There is also a nice article on the opening in the Los Alamos Daily Post.

CINT User Ed Flynn, standing by the exhibit panel on his user project, attends the opening on July 26th.

 

CINT Job Advertisements

Postdocs
We have a number of postdoctoral positions available. Please see the Sandia and Los Alamos job websites and search for keyword CINT.


 

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One Scientific Community Focused on Nanoscience Integration

The Center for Integrated Nanotechnologies (CINT) is a Department of Energy/Office of Science Nanoscale Science Research Center (NSRC) operating as a national user facility devoted to establishing the scientific principles that govern the design, performance, and integration of nanoscale materials. Through its Core Facility in Albuquerque and Gateway to Los Alamos Facility, CINT provides open access to tools and expertise needed to explore the continuum from scientific discovery to the integration of nanostructures into the micro- and macro world.