Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > News > Superlattices are key to advanced nanocrystal applications

September 11th, 2007

Superlattices are key to advanced nanocrystal applications

Zinc Oxide (ZnO) has long been used in its powdered form as pigments in paints, coatings for papers, in the commercial manufacture of rubber goods as well as UVA and UVB blocker and mild antimicrobial in cosmetics. ZnO is also one of the most important semiconductor compounds and numerous reports have been documented in the literature about the preparation and characterization of ZnO nanocrystals. While polycrystalline forms of ZnO have been used for technical uses such as piezoelectric transducers, light emitting diodes, and transparent conducting films, the progress in developing single crystal bulk ZnO have brought its promise as a wide band gap semiconductor to the fore. Superstructures formed from ZnO nanocrystal quantum dots may find applications in various areas such as optics, electronics and magnetism. For these 2D and 3D superstructures to be useful they need to be well-ordered. Usually, nanocrystals without any surface modification are less stable and they usually undergo aggregation or crystal growth, and consequently it is rather hard for bare nanocrystals to self-assemble into 2D, and especially into 3D, ordered structures. So far, most well-ordered assemblies of nanocrystals have been prepared through a surface modification approach. Efforts have been made to prepare superstructures composed of ZnO nanocrystals but it is rather challenging to obtain well-ordered 3D ZnO superlattices. Researchers in China have now found that ZnO nanocrystals capped with ionic liquids spontaneously assemble into a three-dimensional lattice. Apparently, simply drying a solution of the modified ZnO nanocrystals is all that is needed for the superlattice to form. The presence of the ionic liquid prevents the nanocrystals from aggregating.


Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Display technology/LEDs/SS Lighting/OLEDs

Inspiration from the ocean: An interdisciplinary team of researchers at UC Santa Barbara has developed a non-toxic, high-quality surface treatment for organic field-effect transistors October 18th, 2016

Bendable electronic paper displays whole color range October 17th, 2016

Cambrios at CEATEC - Japan 2016 September 29th, 2016

Leti and Taiwanese Tech Organizations Sponsoring Workshop in Taipei on MEMS, IoT, Smart Lighting Applications, System Reliability & Security September 28th, 2016

Chip Technology

Unusual quantum liquid on crystal surface could inspire future electronics October 22nd, 2016

Scientists find technique to improve carbon superlattices for quantum electronic devices: In a paradigm shift from conventional electronic devices, exploiting the quantum properties of superlattices holds the promise of developing new technologies October 20th, 2016

Exploring defects in nanoscale devices for possible quantum computing applications October 19th, 2016

Leti Scientists Participating in Sessions on Med Tech, Automotive Technologies, MEMS, Si-photonics and Lithography at SEMICON Europa: Teams also Will Demonstrate Technology Advances in Telecom, Data Fusion, Energy, Silicon Photonics and 3D Integration October 18th, 2016


Move over, solar: The next big renewable energy source could be at our feet October 20th, 2016

Smashing metallic cubes toughens them up: Rice University scientists fire micro-cubes at target to change their nanoscale structures October 20th, 2016

Study explains strength gap between graphene, carbon fiber: Rice University researchers simulate defects in popular fiber, suggest ways to improve it October 19th, 2016

Working under pressure: Diamond micro-anvils with huge pressures will create new materials October 19th, 2016

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Unusual quantum liquid on crystal surface could inspire future electronics October 22nd, 2016

Physicists use lasers to capture first snapshots of rapid chemical bonds breaking October 21st, 2016

Nanoparticle vaccinates mice against dengue fever October 21st, 2016

New perovskite solar cell design could outperform existing commercial technologies: Stanford, Oxford team creates high-efficiency tandem cells October 21st, 2016

The latest news from around the world, FREE

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

Nanotechnology Now Featured Books


The Hunger Project