Navigation Links
Lasers used to form 3-D crystals made of nanoparticles
Date:6/1/2011

ANN ARBOR, Mich.---University of Michigan physicists used the electric fields generated by intersecting laser beams to trap and manipulate thousands of microscopic plastic spheres, thereby creating 3-D arrays of optically induced crystals.

The technique could someday be used to analyze the structure of materials of biological interest, including bacteria, viruses and proteins, said U-M physicist Georg Raithel.

Raithel is co-author of a research paper on the topic published online May 31 in the journal Physical Review E. The other author is U-M research fellow Betty Slama-Eliau.

The standard method used to characterize biological molecules like proteins involves crystallizing them, then analyzing their structure by bombarding the crystals with X-rays, a technique called X-ray crystallography. But the method cannot be used on many of the proteins of highest interest---such as cell-membrane proteins---because there's no way to crystallize those molecules.

"So we came up with this idea that one could use, instead of a conventional crystal, an optically induced crystal in order to get the crystallization of a sample that could be suitable for structural analysis," said Raithel, professor of physics and associate chair of the department.

To move toward that goal, Raithel and his colleagues are developing the laser technique using microscopically small plastic spheres instead of the molecules. Other researchers have created 3-D optically induced crystals, but Raithel said the crystals his team created are denser than those previously achieved.

The process involves shining laser beams through two opposed microscope lenses, one directly beneath the other. Two infrared laser beams are directed through each lens, and they meet at a common focal point on a microscope slide that holds thousands of plastic nanoparticles suspended in a drop of water.

The intersecting laser beams create electric fields tha
'/>"/>

Contact: Jim Erickson
ericksn@umich.edu
734-647-1842
University of Michigan
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Ultrafast lasers give CU-Boulder researchers a snapshot of electrons in action
2. Aerolase Reports Strong Sales in 2008 for Portable Aesthetic Lasers
3. Plasmonic whispering gallery microcavity paves the way to future nanolasers
4. Breaking barriers with nanoscale lasers
5. Scientists demonstrate multibeam, multi-functional lasers
6. Quantum leap for phonon lasers
7. Capasso lab demonstrates highly unidirectional whispering gallery microlasers
8. Engineers grow nanolasers on silicon, pave way for on-chip photonics
9. Better lasers for optical communications
10. New imaging technique reveals the atomic structure of nanocrystals
11. Physicists discover important step for making light crystals
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2015)... , July 30, 2015   Aratana Therapeutics, ... therapeutics company focused on the licensing, development and ... today announced that its strategic partner VetStem Biopharma, ... confirmation study of AT-016, an adipose-derived allogeneic stem ... treatment of osteoarthritis pain in dogs. ...
(Date:7/30/2015)... , July 30, 2015 Ascendis ... company that applies its innovative TransCon technology to ... top-line results from a six-month Phase 2 study ... TransCon Growth Hormone in 53 treatment-naïve, pre-pubertal children ... "We are extremely pleased with the top-line results ...
(Date:7/30/2015)... ... July 30, 2015 , ... As part of its 2015 growth plan and as ... technical service business units, Whitehouse Laboratories is pleased to announce that it has ... the Container Center of Excellence and will be strictly dedicated to basic USP 51, USP ...
(Date:7/29/2015)... July 30, 2015 Sanofi, ... publie ses résultats pour le premier semestre 2015. ... les résultats. Visionner l,interview vidéo et ... Au sommaire de l,interview :  ... Moteurs de croissance - Diabète ...
Breaking Biology Technology:Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 2Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 3Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 4Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 5Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 2Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 3Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 4Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 5Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 6Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 7Whitehouse Labs Formally Announces Plans to Open a Microbiological Laboratory 2
... Corp. , the banking and payments technology subsidiary of ... formation of a new cash-management division and the appointment ... Gary Kasik. , ,Kasik will run the division, which ... investments, certain income statement items, payables, and receivables with ...
... Senate, by a vote of 63-37, has enacted a bill that ... for embryonic stem cell research, setting the stage for a promised ... needed to override a veto, which would be the first veto ... Stem Cell Research Enhancement Act , was enacted without the possibility ...
... Wis. - The legal challenge to stem cell ... has escalated the war of words between two states -Wisconsin ... , ,The most recent exchange came after the Public ... for Taxpayer and Consumer Rights , filed a formal request ...
Cached Biology Technology:Senate approves bill to expand stem cell funding 2Request to re-examine WARF stem cell patents escalates war of words 2Request to re-examine WARF stem cell patents escalates war of words 3
(Date:7/9/2015)... 9, 2015  Unchained Labs just can,t get ... of Avid Nano. Avid Nano designs, develops and ... Also today, Unchained Labs UNcaged ... to use protein sizing system. The pUNk is ... hydrodynamic size, size distribution, aggregation population and molecular ...
(Date:7/8/2015)... NEW YORK , July 8, 2015  BD ... announced BD & Guidepoint Mentor, a new ... to Guidepoint,s expert network services. BD ... technologies to improve healthcare delivery and outcomes and, with ... start-up entrepreneur will be able to directly engage with ...
(Date:7/7/2015)... -- Research and Markets ( ... "Capacitive Fingerprint Sensors Patent Landscape" report ... fingerprint sensing technology is the most reliable and ... developed. This patent landscape focuses on fingerprint sensors ... of capacitive fingerprint sensors is closely linked to ...
Breaking Biology News(10 mins):Unchained Labs just can't get enough, acquires Avid Nano, rocks out the new pUNk! 2BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 2BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 3Worldwide Capacitive Fingerprint Sensors Patent Landscape Market Report 2015-2020 - Main IP Holders include Seiko Epson, AuthenTec, Sony and STMicroelectronics 2
... Mich.---Researchers have developed what they believe is the first new ... used to treat all HIV patients, which could eventually lead ... the University of Michigan used computer models to develop the ... compound does indeed inhibit HIV protease, which is an established ...
... Oregon white oak were once widespread in the Pacific ... Fire suppression, conifer and invasive plant encroachment, and land ... much as 99 percent of the oak communities historically ... new technical report titled "Evaluation of Landscape Alternatives for ...
... experts on evolution will gather in Minnesota June 20 ... gathering of evolutionary biologists. The conference, the premier international ... is sponsored by the University of Minnesota,s Bell Museum ... and Minnesota Citizens for Science Education. Headlining the ...
Cached Biology News:Compound has potential for new class of AIDS drugs 2University of Minnesota to host world's largest conference on evolution 2
... Measurement of light production by luciferase-cDNA ... a valuable technique in the development of ... is used as an indicator for the ... the luciferase enzyme is due to advantages ...
... detection of apoptosis and mitochondrial membrane potential. ... early indication of the initiation of cellular ... a collapse in the electrochemical gradient across ... change in the membrane potential (YD). Loss ...
... kit measures mitochondria intactness and detects ... potential. Features and Benefits: ... staining isolated mitochondria and for assaying ... the reagents required for the detection ...
... is expressed in g per ml and is ... pH 6.8, of a 1 mg per ml ... concentration to agglutinate a 2% suspension of human ... at 25 C. Preparation Note: Affinity ...
Biology Products: