Navigation Links
Caltech chemists develop simple technique to visualize atomic-scale structures
Date:9/2/2010

eriments in which they deposited the graphene sheets at varying humidity levels. The odd structures became more prevalent at higher humidity, and disappeared under completely dry conditions, leading the researchers to conclude that they indeed were water molecules blanketed by the graphene. Heath and his colleagues realized that the graphene sheet was "atomically conformal"it hugged the water molecules so tightly, almost like shrink wrap, that it revealed their detailed atomic structure when examined with atomic force microscopy. (Atomic force microscopes use a mechanical probe to essentially "feel" the surfaces of objects.)

"The technique is dead simpleit's kind of remarkable that it works," Heath says. The method, he explains, "is sort of like how people sputter carbon or gold onto biological cells so they can image them. The carbon or gold fixes the cells. Here, the graphene perfectly templates the weakly adsorbed water molecules on the surface and holds them in place, for up to a couple of months at least."

Using the technique, the researchers revealed new details about how water coats surfaces. They found that the first layer of water on mica is actually two water molecules thick, and has the structure of ice. Once that layer is fully formed, a second, two-molecule-thick layer of ice forms. On top of that, "you get droplets," Heath says. "It's truly amazing that the first two adsorbed layers of water form ice-like microscopic islands at room temperature," says Xu. "These fascinating structures are likely important in determining the surface properties of solids, including, for example, lubrication, adhesion, and corrosion."

The researchers have since successfully tested other molecules on other types of atomically flat surfacessuch flatness is necessary so the molecules don't nestle into imperfections in the surface, distorting their structure as measured through the graphene layer. "We have yet to find a system for which this doesn
'/>"/>

Contact: Kathy Svitil
ksvitil@caltech.edu
626-395-8022
California Institute of Technology
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Fruit flies use horizontal landmarks for altitude control, says Caltech research team
2. Caltech: Gain and loss in optimistic versus pessimistic brains
3. Caltech biologists discover how T cells make a commitment
4. East-African human ancestors lived in hot environments, says Caltech-led team
5. Caltech-led team provides proof in humans of RNA interference using targeted nanoparticles
6. Caltech and UCSD scientists establish leech as model for study of reproductive behavior
7. Caltech receives more than $33 million from American Recovery and Reinvestment Act
8. Caltech researchers presenting at AAAS Meeting
9. Caltech researchers obtain first brain recordings from behaving fruit flies
10. Caltech neuroscientists discover brain area responsible for fear of losing money
11. Caltech scientists find emotion-like behaviors, regulated by dopamine, in fruit flies
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Caltech chemists develop simple technique to visualize atomic-scale structures
(Date:8/4/2015)... Aug. 4, 2015  AMRI (NASDAQ: AMRI ) today reported ... 2015. Highlights: , Second quarter contract revenue ... 2014 , Adjusted contract margins of ... $0.22, including a $0.05 decrease in EPS from royalties in the ... million "We are very pleased to present another ...
(Date:7/31/2015)... China , 31 de julho de 2015 /PRNewswire/ ... (ICG-10, www.icg-10.org ) será realizada pela BGI de 22-25 ... . A conferência está celebrando seu ... em 2006, a ICG se tornou uma das reuniões ... um dos encontros científicos mais dinâmicos, entusiastas e prazerosos. ...
(Date:7/31/2015)... --NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... mobile commerce market and creator of the Wocket® smart ... for ELECTRONIC CRYPTO-CURRENCY MANAGEMENT METHOD AND SYSTEM ... crypto-currencies such as Bitcoin into the consumer market of ... manage all payments.  The technology manages ...
Breaking Biology News(10 mins):AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24A 10a. Conferência Internacional sobre Genômica (ICG-10) será em outubro 2A 10a. Conferência Internacional sobre Genômica (ICG-10) será em outubro 3NXT-ID Patents Electronic Crypto-Currency Management Technology 2NXT-ID Patents Electronic Crypto-Currency Management Technology 3NXT-ID Patents Electronic Crypto-Currency Management Technology 4
... Aug. 30, 2012For many diabetics, monitoring their condition involves ... sensing and insulin injections. It also entails carefully monitoring ... An innovative new optical diagnostic tool created ... Optical Society,s (OSA) open-access journal Biomedical Optics Express ...
... The Wellcome Trust and the Engineering and Physical Sciences ... 30 million initiative to find biomedical engineering solutions to ... partnership will provide funding for a limited number of ... current solutions are inadequate. Up to 10m over seven ...
... University of Leicester to buy a unique piece of retinal ... the UK. The handheld retinal scanner will allow new research ... involuntary twitching movements of the eyes. The device is ... often miss out on diagnoses because standard equipment is unsuitable ...
Cached Biology News:Shedding new light on one of diabetes' most dangerous complications 2£30 million boost for biomedical engineering research 2University of Leicester takes delivery of unique eye imaging equipment 2University of Leicester takes delivery of unique eye imaging equipment 3
(Date:8/3/2015)...  ArroGen Group, an integrated advanced forensic solutions ... (FMID) technology Aug. 2-8 at the International Association ... Calif. FMID, a new ... agents, district attorneys and government agencies to build ... By analyzing chemical residues on fingerprints taken from ...
(Date:8/3/2015)... , Aug. 3, 2015  MiMedx Group, Inc. ... utilizing human amniotic tissue and patent-protected processes to develop ... Care, Surgical, Orthopedic, Spine, Sports Medicine, Ophthalmic and Dental ... at the 35 th Annual Canaccord|Genuity Growth Conference ... "Pete" Petit, Chairman and CEO, William C. Taylor ...
(Date:8/3/2015)... , Aug. 3, 2015  Merck KGaA, Darmstadt, ... and top-quality high-tech products in the healthcare, life science ... US-based company Nano-C, their development and launch of promising ... photovoltaics (OPV). Merck KGaA, Darmstadt, Germany ... growing OPV sector. Novel derivatives: highly stable, ...
(Date:8/3/2015)... DIEGO , Aug. 3, 2015  Aethlon Medical, Inc. ... biofiltration devices to treat life-threatening diseases, today announced that ... conference call and webcast on Thursday, August 13, 2015 ... and webcast will follow the release of fiscal 2016 ... will be available approximately two hours after the call ...
Breaking Biology Technology:ArroGen Previews New Fingerprint Molecular Identification Technology 2MiMedx To Present At 35th Annual Canaccord|Genuity Growth Conference 2Merck KGaA, Darmstadt, Germany, and Nano-C Present Enhanced Materials for Organic Photovoltaics 2Merck KGaA, Darmstadt, Germany, and Nano-C Present Enhanced Materials for Organic Photovoltaics 3Merck KGaA, Darmstadt, Germany, and Nano-C Present Enhanced Materials for Organic Photovoltaics 4Aethlon Medical To Host First Quarter Fiscal 2016 Investor Call on August 13, 2015 2
... A ... Biology are Natural Partners in the Fight Against Disorder. , ... (PRWEB) November 3, 2009 -- MyPhield Technology ... naturally relieves osteoarthritis without causing unwanted side-effects, is now available online at www.ReliefForLife.ca ...
... 3 ISTA Pharmaceuticals, Inc. (Nasdaq: ISTA ), ... 30, 2009. ISTA reported net revenue of $32.0 million ... increase over net revenue for the three months ended September ... months ended September 30, 2009 is $1.2 million associated with ...
... SAN MARCOS, Texas, Nov. 3 Texas State University ... agreement today that will permit University Researchers to continue ... potential and effectiveness of ALKA-V6, a compound which has ... the HIV virus in laboratory experiments. , The research ...
Cached Biology Technology:New Technology Now Available In Canada For Osteoarthritis 2ISTA Pharmaceuticals Reports Third Quarter 2009 Financial Results 2ISTA Pharmaceuticals Reports Third Quarter 2009 Financial Results 3ISTA Pharmaceuticals Reports Third Quarter 2009 Financial Results 4ISTA Pharmaceuticals Reports Third Quarter 2009 Financial Results 5ISTA Pharmaceuticals Reports Third Quarter 2009 Financial Results 6ISTA Pharmaceuticals Reports Third Quarter 2009 Financial Results 7ISTA Pharmaceuticals Reports Third Quarter 2009 Financial Results 8ISTA Pharmaceuticals Reports Third Quarter 2009 Financial Results 9Texas State University Prepares for Phase 2 Research on the Potential New Cancer and HIV Fighting ALKA-V6 Compound 2Texas State University Prepares for Phase 2 Research on the Potential New Cancer and HIV Fighting ALKA-V6 Compound 3
... series embodies all aspects of classical microscopy ... powerful Achromatic Super Contrast (ASC) objectives coupled ... this microscope combines flexibility and professional microscopy ... B1 series, the DM-B1 steps into the ...
... gel stain is a sensitive nucleic ... when bound to RNA and low background ... with either formaldehyde/agarose or polyacrylamide gels using ... 500 µL unit size (S-7564) and 1mL ...
... and reports the data from any one of ... chart recorder. The final data is sent from ... selection is automatic for Systolic, Mean, Heart Rate ... user is always in the position to override ...
... HT is taking automated patch clamping to a ... ability to generate thousands of high quality data ... paradigms in ion channel drug discovery and safety ... quality afforded by conventional patch clamping can now ...
Biology Products: