Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Self-assembling silica microwires may herald new generation of integrated optical devices: Optical Materials Express paper details new laser technique with applications in sensing, photovoltaics, optical switches

These scanning electron microscope images reveal how UV laser light changes the surface texture and wettability of glass. Figures (a) and (b) reveal subtle texturing after lower-energy exposure to laser light. These textures made the surfaces more hydrophilic in (a) and more hydrophobic (water repellent) in (b). Higher energies produced a rougher and even more hydrophilic (wettable) (c) and (d) close-up of (c), surface.

Credit: Optical Materials Express.
These scanning electron microscope images reveal how UV laser light changes the surface texture and wettability of glass. Figures (a) and (b) reveal subtle texturing after lower-energy exposure to laser light. These textures made the surfaces more hydrophilic in (a) and more hydrophobic (water repellent) in (b). Higher energies produced a rougher and even more hydrophilic (wettable) (c) and (d) close-up of (c), surface.

Credit: Optical Materials Express.

Abstract:
Silica microwires are the tiny and as-yet underutilized cousins of optical fibers. If precisely manufactured, however, these hair-like slivers of silica could enable applications and technology not currently possible with comparatively bulky optical fiber. By carefully controlling the shape of water droplets with an ultraviolet laser, a team of researchers from Australia and France has found a way to coax silica nanoparticles to self-assemble into much more highly uniform silica wires.

Self-assembling silica microwires may herald new generation of integrated optical devices: Optical Materials Express paper details new laser technique with applications in sensing, photovoltaics, optical switches

Washington, DC | Posted on January 25th, 2013

The international team describes their novel manufacturing technique and its potential applications in a paper published today in the Optical Society's (OSA) open-access journal Optical Materials Express. This technique is particularly significant, according to the researchers, because it could, for the first time, enable silica to be combined with any material through a process of microwire self-assembly.

"We're currently living in the 'Glass Age,' based upon silica, which enables the Internet," says John Canning, team member and a professor in the school of chemistry at The University of Sydney in Australia. "Silica's high thermal processing, ruggedness, and unbeatable optical transparency over long distances equate to unprecedented capacity to transmit data and information all over the world."

Silica, however, is normally incompatible with most other materials so functionalizing silica (giving it the capability) to do more than just carry light has been a challenge. Further, bridging the gap between the light-speed transmission of data through silica and electronic and photonic components - such as optical switches, optical circuits, photon sources, and even sensors - requires some form of interconnect. But this transition is highly inefficient using optical fibers and interconnection losses remain one of the largest unresolved issues in optical communications.

Silica microwires, if they could be manufactured or self-assembled in place, have the potential to operate as optical interconnects. They also could achieve new functionality by adding different chemicals that can only be introduced by self-assembly.

Silica wires, unlike optical fiber, have no cladding, which means greater confinement of light in a smaller structure better suited for interconnection, further minimizing losses and physical space. "So we were motivated to solve the great silica incompatibility problem," explains Canning.

To this end, the researchers came up with the idea of using evaporative self-assembly of silica nanoparticles at room temperature. They recently reported this breakthrough in the journal Nature Communications, demonstrating single-photon-emitting nanodiamonds embedded in silica, which is a first step toward a practical photon source for future quantum computing.

The key to carrying this innovation further, as described in their new research published today in Optical Materials Express, is perfecting the manufacturing process so highly uniform wires self-assemble from nanoparticles suspended in a solution. The challenge has been that as naturally forming round droplets evaporate, they produce very uneven silica microwires. This is due to the microfluidic currents inside the droplet, which corral the nanoparticles into specific patterns aided and held together by intermolecular attractive forces. The nanoparticles then crystalize when the solvent (water) evaporates.

Canning and his team realized that by changing the shape of the droplet and elongating it ever so slightly, they could concurrently change the flow patterns inside the drop, controlling how the nanoparticles assemble.

The researchers did this by changing the "wettability" properties of the glass the drops were resting upon. The team used an ultraviolet laser to alter and pattern a glass made of the mineral borosilicate. This patterning made the surface more wettable in a very controlled way, allowing the droplet to assume a slightly more oblong shape. This subtle shape change was enough to alter the microscopic flows and eddies so as the water evaporated, the silica formed straighter, more uniform microwires.

The researchers anticipate that their processing technology will allow complete control of nanoparticle self-assembly for various technologies, including microwire devices and sensors, photon sources, and possibly silica-based integrated circuits.

It also will enable the production of selective devices such as chemical and biological sensors, photovoltaic structures, and novel switches in both optical fiber form and on waveguides - all of which could lead to technologies that seamlessly integrate microfluidic, electronic, quantum, and photonic functionality.

####

About Optical Society of America
Uniting more than 180,000 professionals from 175 countries, the Optical Society (OSA) brings together the global optics community through its programs and initiatives. Since 1916 OSA has worked to advance the common interests of the field, providing educational resources to the scientists, engineers and business leaders who work in the field by promoting the science of light and the advanced technologies made possible by optics and photonics. OSA publications, events, technical groups and programs foster optics knowledge and scientific collaboration among all those with an interest in optics and photonics. For more information, visit www.osa.org.

About Optical Materials Express

Optical Materials Express (OMEx) is OSA's newest peer-reviewed, open-access journal focusing on the synthesis, processing and characterization of materials for applications in optics and photonics. OMEx primarily emphasizes advances in novel optical materials, their properties, modeling, synthesis and fabrication techniques; how such materials contribute to novel optical behavior; and how they enable new or improved optical devices. It is published by the Optical Society and edited by David J. Hagan of the University of Central Florida. For more information, visit www.OpticsInfoBase.org/OMEx.

For more information, please click here

Contacts:
Brielle Day

202-416-1435

Copyright © Optical Society of America

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

"Laser tailoring surface interactions, contact angles, drop topologies, and the self-assembly of optical microwires," J. Canning et al., Optical Materials Express, Vol. 3, Issue 2, pp. 284-294 (2013):

Related News Press

News and information

Scientists refine formula for nanotube types: Rice University theorists determine factors that give tubes their chiral angles September 17th, 2014

New non-invasive technique could revolutionize the imaging of metastatic cancer September 17th, 2014

Toward making lithium-sulfur batteries a commercial reality for a bigger energy punch September 17th, 2014

Recruiting bacteria to be technology innovation partners: September 17th, 2014

Chip Technology

‘Small’ transformation yields big changes September 16th, 2014

UT Arlington research uses nanotechnology to help cool electrons with no external sources September 11th, 2014

Excitonic Dark States Shed Light on TMDC Atomic Layers: Berkeley Lab Discovery Holds Promise for Nanoelectronic and Photonic Applications September 11th, 2014

Researchers Create World’s Largest DNA Origami September 11th, 2014

Self Assembly

Rice rolls 'neat' nanotube fibers: Rice University researchers' acid-free approach leads to strong conductive carbon threads September 15th, 2014

Molecular self-assembly controls graphene-edge configuration September 10th, 2014

Rice chemist wins rare NSF Special Creativity Award: Grant extension will bolster Zubarev's effort to produce gold nanorods September 8th, 2014

Magnetic nanocubes self-assemble into helical superstructures September 4th, 2014

Optical Computing

Atomically thin material opens door for integrated nanophotonic circuits September 4th, 2014

Electrical engineers take major step toward photonic circuits: Team invents non-metallic metamaterial that enables them to 'compress' and contain light August 19th, 2014

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

New NIST metamaterial gives light a one-way ticket July 2nd, 2014

Sensors

Nanoscience makes your wine better September 17th, 2014

Simple, Cost-Effective Method Proposed for Synthesizing Zinc Oxide Nanopigments September 15th, 2014

First Colloid and Polymer Science Lecture awarded to Orlin D. Velev: Chemical engineer honored for outstanding research in colloid science September 12th, 2014

UT Arlington research uses nanotechnology to help cool electrons with no external sources September 11th, 2014

Discoveries

Scientists refine formula for nanotube types: Rice University theorists determine factors that give tubes their chiral angles September 17th, 2014

New non-invasive technique could revolutionize the imaging of metastatic cancer September 17th, 2014

Toward making lithium-sulfur batteries a commercial reality for a bigger energy punch September 17th, 2014

Recruiting bacteria to be technology innovation partners: September 17th, 2014

Announcements

New NPZ100-403 Piezo Stage from nPoint Inc. September 17th, 2014

Scientists refine formula for nanotube types: Rice University theorists determine factors that give tubes their chiral angles September 17th, 2014

New non-invasive technique could revolutionize the imaging of metastatic cancer September 17th, 2014

Toward making lithium-sulfur batteries a commercial reality for a bigger energy punch September 17th, 2014

Energy

Rice rolls 'neat' nanotube fibers: Rice University researchers' acid-free approach leads to strong conductive carbon threads September 15th, 2014

Simple, Cost-Effective Method Proposed for Synthesizing Zinc Oxide Nanopigments September 15th, 2014

UT Arlington research uses nanotechnology to help cool electrons with no external sources September 11th, 2014

Excitonic Dark States Shed Light on TMDC Atomic Layers: Berkeley Lab Discovery Holds Promise for Nanoelectronic and Photonic Applications September 11th, 2014

Photonics/Optics/Lasers

'Squid skin' metamaterials project yields vivid color display: Rice lab creates RGB color display technology with aluminum nanorods September 15th, 2014

Fonon at Cutting-Edge of 3D Military Printing: Live-Combat Scenarios Could See a Decisive Advantage with 3D Printing September 15th, 2014

Simple, Cost-Effective Method Proposed for Synthesizing Zinc Oxide Nanopigments September 15th, 2014

First Colloid and Polymer Science Lecture awarded to Orlin D. Velev: Chemical engineer honored for outstanding research in colloid science September 12th, 2014

Solar/Photovoltaic

Simple, Cost-Effective Method Proposed for Synthesizing Zinc Oxide Nanopigments September 15th, 2014

Indium/Copper Sulfide Compound Semi-Conductor Synthesized through New Method September 8th, 2014

Material development on the nanoscale: Doped graphene nanoribbons with potential September 8th, 2014

Layered graphene sandwich for next generation electronics September 8th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE