Navigation Links
Nanoparticles assemble by millions to encase oil drops
Date:5/29/2008

HOUSTON -- May 29, 2008 -- In a development that could lead to new technologies for cleaning up oil spills and polluted groundwater, scientists at Rice University have shown how tiny, stick-shaped particles of metal and carbon can trap oil droplets in water by spontaneously assembling into bag-like sacs.

The tiny particles were found to assemble spontaneously by the tens of millions into spherical sacs as large as BB pellets around droplets of oil in water. In addition, the scientists found that ultraviolet light and magnetic fields could be used to flip the nanoparticles, causing the bags to instantly turn inside out and release their cargo -- a feature that could ultimately be handy for delivering drugs.

"The core of the nanotechnology revolution lies in designing inorganic nanoparticles that can self-assemble into larger structures like a 'smart dust' that performs different functions in the world for example, cleaning up pollution," said lead research Pulickel Ajayan, Rice's Benjamin M. and Mary Greenwood Anderson Professor in Mechanical Engineering and Materials Science. "Our approach brings the concept of self-assembling, functional nanomaterials one step closer to reality."

The research was published online today by the American Chemical Society's journal Nano Letters.

The multisegmented nanowires, akin to "nanoscale batons," were made by connecting two nanomaterials with different properties, much like an eraser is attached to the end of a wooden pencil. In the study, the researchers started with carbon nanotubes -- hollow tubes of pure carbon. Atop the nanotubes, they added short segments of gold. Ajayan said that by adding various other segments -- like sections of nickel or other materials -- the researchers can create truly multifunctional nanostructures.

The tendency of these nanobatons to assemble in water-oil mixtures derives from basic chemistry. The gold end of the wire is water-loving, or hydrophi
'/>"/>

Contact: Jade Boyd
jadeboyd@rice.edu
713-348-6778
Rice University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Environmental fate of nanoparticles depends on properties of water carrying them
2. Researchers mimic bacteria to produce magnetic nanoparticles
3. MIT: Remote-control nanoparticles deliver drugs directly into tumors
4. Novel 3-D cell culture model shows selective tumor uptake of nanoparticles
5. Analysis of millions of US births shows association between birth defects and preterm birth
6. New Swedish research hope for millions of sufferers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/23/2014)... called SUP05 will play an increasingly important role in ... oxygen minimum zones expand, according to research published this ... of Sciences . , University of British Columbia researchers ... Saanich Inlet, to chart how microbial community metabolism changes ... a very detailed picture of how SUP05 a ...
(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)... sophisticated equipment, trained personnel, and detection dogs to ... attacks. A revolutionary new electronic chip with nano-sized ... much easier. , The groundbreaking nanotechnology-inspired sensor, devised ... ,s School of Chemistry and Center for Nanoscience ... Tracense, picks up the scent of explosives molecules ...
Breaking Biology News(10 mins):Research charts the ecological impact of microbial respiration in the oxygen-starved ocean 2Nano-sized chip "sniffs out" explosives far better than trained dogs 2
... HOUSTON -- (Aug. 16, 2010) -- A new ... and other human activity has completely obscured the natural ... "The natural factors that influence carbon dioxide cycling ... the radiocarbon signature of the river to reflect those ...
... of some of the most repugnant smells on earth, but ... has a sense of smell of its own. A team ... first time that bacteria have a molecular "nose" that is ... today in Biotechnology Journal , their study shows how ...
... infrared laser can make a heart beat faster. Scientists ... pulsed light can pace contractions in an avian embryonic heart, ... pacing of the embryonic heart," will be published in the ... 15, 2010. According to the scientists, this non-invasive device ...
Cached Biology News:A river flipped: Humans trump nature on Texas river 2A river flipped: Humans trump nature on Texas river 3Bacteria breakthrough is heaven scent 2A heart beats to a different drummer 2
(Date:7/23/2014)... 23, 2014 Astra Nova ... comprehensive consultancy and pharma training services, and the ... (ACRES) , a non-profit integrating the expertise and ... maintain a global system for clinical trials, are ... improve the expertise of industry professionals through improved ...
(Date:7/22/2014)... the National Institute of Standards and Technology (NIST) ... a new design for an atomic clock that ... a microcomb. , The microcomb clock, featured on ... new journal Optica ,* is the first ... its accurate conversion of optical frequencies to lower ...
(Date:7/22/2014)... Nuclear reactors are used to produce ... fission chain reaction in nuclear reactors is used to ... drive a power- generating turbine. Currently nuclear reactors are ... electricity production. Nuclear reactor market is expected to grow ... proposed nuclear reactor projects. , Early buyers will receive ...
(Date:7/22/2014)... The DNA Spectrum Ancestry Map ... of history, migration, and culture. , Throughout his ... history stories stemming from Europe. His father passionately referred ... and 8mm home movies painted an elaborate picture of ... Steve ordered a test from DNA Spectrum to expand ...
Breaking Biology Technology:Astra Nova and ACRES Partner on Quality and Access of Training for Research Professionals 2Astra Nova and ACRES Partner on Quality and Access of Training for Research Professionals 3'Comb on a chip' powers new NIST/Caltech atomic clock design 2Nuclear 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 3DNA Test from DNA Spectrum Shows Heritage Like a Map of the Past 2DNA Test from DNA Spectrum Shows Heritage Like a Map of the Past 3DNA Test from DNA Spectrum Shows Heritage Like a Map of the Past 4
... 25 /PRNewswire/ - EastMed Inc., the medical manufacturing company ... received FDA clearance to market its flagship product, uresta(TM) ... are delighted to get the official word from the ... Inc. "Uresta (TM) Continence Care offers an innovative and ...
... The Atlantica BioEnergy Task Force today completed a two-day ... education leaders from across Atlantic Canada and Maine, to ... "The global forest industry is rapidly changing ... for environmentally sustainable ways to best use our wood-based ...
... Bio Group, LLC -- a North,American Advisory firm -- ... Review Commission, to conduct special analyses on China,s continuing,developmental ... of merely focusing on the top-tiered,areas of Beijing, Shanghai, ... examined for the project. , ...
Cached Biology Technology:Atlantica Bioenergy Task Force hosts industry and government leaders 2Atlantica Bioenergy Task Force hosts industry and government leaders 3
... is a type I eukaryotic topoisomerase that ... (also called right- and left-handed supercoils) from ... reaction is a covalently closed, circular DNA ... DNA Topoisomerase I does not absolutely require ...
... DNA Modification Kit contains reagents required to ... sample. In the bisulfite reaction, all unmethylated ... to uracils, while 5-methylcytosines remain unaltered. Thus, ... differ depending on whether the DNA is ...
... EnzChek Pyrophosphate Detection Kit,provides a fast, ... the inorganic pyrophosphate (PPi ) produced,by ... as DNA and,RNA polymerizations, cyclic AMP ... the enzymatic activation of fatty acids ...
... Premixed solution for high PCR specificity ... the combination of enzyme with unique ... nonspecific amplification provided by the ... handling convenient Master Mix and ...
Biology Products: