Navigation Links
Making a gem of a tiny crystal
Date:11/27/2013

ystals they can build. The Northwestern team worked with gold nanoparticles, but the recipe can be applied to a variety of materials, with potential applications in the fields of materials science, photonics, electronics and catalysis.

A single crystal has order: its crystal lattice is continuous and unbroken throughout. The absence of defects in the material can give these crystals unique mechanical, optical and electrical properties, making them very desirable.

In the Northwestern study, strands of complementary DNA act as bonds between disordered gold nanoparticles, transforming them into an orderly crystal. The researchers determined that the ratio of the DNA linker's length to the size of the nanoparticle is critical.

"If you get the right ratio it makes a perfect crystal -- isn't that fun?" said Olvera de la Cruz, who also is a professor of chemistry in the Weinberg College of Arts and Sciences. "That's the fascinating thing, that you have to have the right ratio. We are learning so many rules for calculating things that other people cannot compute in atoms, in atomic crystals."

The ratio affects the energy of the faces of the crystals, which determines the final crystal shape. Ratios that don't follow the recipe lead to large fluctuations in energy and result in a sphere, not a faceted crystal, she explained. With the correct ratio, the energies fluctuate less and result in a crystal every time.

"Imagine having a million balls of two colors, some red, some blue, in a container, and you try shaking them until you get alternating red and blue balls," Mirkin explained. "It will never happen.

"But if you attach DNA that is complementary to nanoparticles -- the red has one kind of DNA, say, the blue its complement -- and now you shake, or in our case, just stir in water, all the particles will find one another and link together," he said. "They beautifully assemble into a three-dimensional crystal that we pre
'/>"/>

Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Making electrical contact along 1-D edge of 2-D materials
2. ChemAxon Major Software Release brings New Desktop, Web and Visualization Applications to Power Chemistry Decision Making
3. Computational Analysis in Clinical and Preclinical Decision-Making, new webinar hosted by Xtalks
4. Advancing Preclinical Predictions, Making Faster Clinical Decisions with Cancer Models and Preclinical Imaging - World Pharma Congress this June in Philadelphia
5. Making cancer less cancerous
6. Campbell Alliance to Release New Forward-Looking Industry Report on Deal-Making Trends at the 2013 BIO International Convention
7. Engineer making rechargeable batteries with layered nanomaterials
8. 2012 Battalia Winston Survey Finds Corporate Holiday Parties are Making a Comeback
9. Making renewable viable
10. Making microscopic machines using metallic glass
11. Butamax Granted Core Patent for Making Biobutanol and Distillers Grains; Offers Producers Efficient, Low-Cost Production of Biobutanol
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/23/2014)... Sciences, Inc. (OTCQB: GBLX), a medical cannabis research and development ... marijuana dispensary locations in Las Vegas, Nevada ... Clark County, Nevada dispensary for which the company ... GrowBLOX Sciences, CEO Craig Ellins stated, "We ... in the City of Las Vegas . ...
(Date:7/23/2014)... (PRWEB) July 23, 2014 a2z Inc. ... ChirpE Mobile App, AACC Pathfinder, in its 2014 ... AACC’s annual meeting is planned for July 29-31, 2014 ... place to be to connect with global leaders in ... management, and other areas of breaking science in laboratory ...
(Date:7/22/2014)... 2014 Even within a phylum so full of mean ... other arthropods for its cruelty -- at least to crickets. ... fly is a most predatory sort of parasite. It swoops ... smear of larvae, and leaves its wicked brood to invade, ... None of this would be possible without the fly,s ability ...
(Date:7/22/2014)... July 22, 2014 Nuclear reactors are ... produced by controlled fission chain reaction in nuclear reactors ... is used to drive a power- generating turbine. Currently ... the world’s total electricity production. Nuclear reactor market is ... construction, planned and proposed nuclear reactor projects. , Early ...
Breaking Biology Technology:GrowBLOX Sciences, Inc. Files for Two Additional Medical Marijuana Dispensaries in Las Vegas 2GrowBLOX Sciences, Inc. Files for Two Additional Medical Marijuana Dispensaries in Las Vegas 3AACC Enhances Attendee Experience at Its 2014 Annual Meeting & Clinical Lab Expo with a2z-Powered ChirpE Photo Booth and Mobile App 2AACC Enhances Attendee Experience at Its 2014 Annual Meeting & Clinical Lab Expo with a2z-Powered ChirpE Photo Booth and Mobile App 3Fly-inspired sound detector 2Fly-inspired sound detector 3Fly-inspired sound detector 4Nuclear Energy Market: Global Industry Analysis, Size, Share, Analysis, Growth and Forecast 2013 - 2019 2Nuclear Energy Market: Global Industry Analysis, Size, Share, Analysis, Growth and Forecast 2013 - 2019 3
... , , , ... company developing orally available antiviral therapeutics, announced today that Kenneth I. ... , Mr. Moch brings more than ... has played a key role in building several life science companies. ...
... UCSF research papers this week are marking major breakthroughs ... disease that infects more than 200 million people worldwide ... death. One paper documents a multinational success, led ... in England, in sequencing the genome of the Schistosoma ...
... July 15 , Million EUR 2008 08/07 ... MEUR %Sales Var.% MEUR %Sales Var.%, Southern Europe (1) 26.7 71 15 28.5 68 ... Other markets 2.0 5 47 1.5 ... 21 33.8 82 12, SCIT ...
Cached Biology Technology:Chimerix, Inc. Appoints Kenneth I. Moch Chief Operating Officer 2UCSF researchers help crack parasite genome, identify drug leads 2UCSF researchers help crack parasite genome, identify drug leads 3STALLERGENES: Strong Sales Growth in 1st Half-Year: up 12% Full-Year Guidance Maintained 2STALLERGENES: Strong Sales Growth in 1st Half-Year: up 12% Full-Year Guidance Maintained 3
(Date:7/23/2014)... has the nasty habit of getting tangled and forming ... and learn how to disentangle them (e.g. useful for ... School for Advanced Studies (SISSA) in Trieste and his ... simulate these knots and their dynamics. In their latest ... , Micheletti together with Marco Di Stefano, first author ...
(Date:7/23/2014)... Security forces worldwide rely on sophisticated equipment, trained ... other public areas against terrorist attacks. A revolutionary ... about to make their job much easier. , ... Patolsky of Tel Aviv University ,s School of ... developed by the Herzliya company Tracense, picks up ...
(Date:7/23/2014)... of the brain is important for encoding ... underlying mechanisms are unclear. Dr. Zhouyan Feng ... the activity of hippocampal neurons in rats ... underlying the neuronal responses. Somatosensory stimulation, in ... field potentials into theta rhythm-dominated waveforms, decreased ...
Breaking Biology News(10 mins):Nano-sized chip "sniffs out" explosives far better than trained dogs 2
... HANOVER, NH In a new study, Dartmouth researchers describe ... virulent nature of Vibrio cholerae , the bacteria that ... find a fatty acid that appears to inhibit ToxT, which ... diarrhea, can be life threatening, and, according to the World ...
... into a run: they switch effortlessly from walking to a ... makes it impossible for them to bounce up in the ... are they running or walking? At a first glance, fast-moving ... Hutchinson from the Royal Veterinary College, UK. But closer analysis ...
... February 11, 2010-Academic programs and courses have increased in ... In a recent study published in the 2010 volume ... Sciences Education, researchers from Cornell University and North ... and experiential learning, which are often a part of ...
Cached Biology News:Dartmouth researchers describe how the cholera bacteria becomes infectious 2Are high speed elephants running or walking? 2Are high speed elephants running or walking? 3Hands-on: From classroom to employment 2
Mouse monoclonal [0.N.509] to PCTAIRE2 ( Abpromise for all tested applications). entrezGeneID: 5128 SwissProtID: Q00537...
Rabbit Anti-Human Secretory Carrier Membrane Protein 2 (SCAMP2 Polyclonal AntibodyOther Sub-Family: not assigned-Other Applications: Western Blot...
Parathyroid Hormone Receptor 2 [PTHR2]...
... Desalt Spin Columns contain a proprietary high-performance ... exceptional desalting and protein-recovery characteristics compared to ... low as 25 g/ml of protein can ... > 95% retention of salts and other ...
Biology Products: