The Spring 2013 Call for Proposals is now open. The deadline for submission is March 31.

During the open Call for Proposals, we will not be accepting Rapid Access proposals. Rapid Access submission will resume in April.

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Science Highlights:

First Infrared Quantum Dots to Stop Blinking

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Non-blinking excitonic emission from near-infrared (NIR) and type-II nanocrystal quantum dots (NQDs) is reported for the first time, coupled with suppressed Auger recombination (AR). To realize this unusual degree of stability at the single-dot level, novel InP/CdS core/shell NQDs were synthesized for a range of shell thicknesses (∼1−11 monolayers of CdS).

Significance: This new system demonstrates that electronic structure and shell thickness can be employed together to effect control over key single-dot and ensemble NQD photophysical properties. Suppressed-blinking, NIR emitting NQDs are ideal candidates molecular probes for single-particle tracking; suppressed AR has important implications for optical amplification and lasing.

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Research Details:
•Ensemble spectroscopy measurements (photoluminescence peak position and radiative lifetimes) and electronic structure calculations established the transition from type-I to type-II band alignment.
•Single-NQD studies revealed clear evidence for blinking suppression that was not strongly shell-thickness dependent, while photobleaching and biexciton lifetimes trended explicitly with extent of shelling.
•Specifically, very long biexciton lifetimes−up to 7 ns−were obtained for the thickest-shell structures, indicating dramatic suppression of AR.

Full article:A.M. Dennis, B.D. Mangum, A. Piryatinski, Y.-S. Park, D.C. Hannah, J.L. Casson, D.J. Williams, R.D. Schaller, H. Htoon, J.A. Hollingsworth, Nano Lett. 12, 5545 (2012).

Contact: Jennifer Hollingsworth

Upcoming CINT events

CINT, along with the other Nanoscale Science Research Centers (NSRCs), will be hosting a "Nanophotonics at the NSRCs" symposia at the upcoming CLEO conference June 9-14 in San Jose, CA. For more information, please contact Igal Brener.

The 5th WONTON (Workshop on Nanotube Optics and Nanospectroscopy) will be held in Santa Fe, June 16-20. Registration is now available.

 

CINT Job Advertisements

NEW - Post-doctoral Position – SBCN Thrust, CINT
Post-doctoral position available immediately, at the Center for Integrated Nanotechnologies (CINT) Los Alamos National Laboratory.  Research will contribute to efforts on Nanostructured Macromolecular Materials and Assemblies within the SBCN thrust.

Qualifications: Highly motivated post-doctoral scientist with significant experience in organic and polymer synthesis.  Additional expertise in soft matter, conducting polymers or gels would be valuable.

Candidates interested in applying for the position should email a CV, brief cover letter, and three letters of recommendations to Dr. Millicent Firestone (firestone@lanl.gov)

 

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


User Newsletter

Here is the August 2012 Integrated Circuit. It is full of announcements, science highlights and other news.

more highlights...


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.

 

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