Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Zinc stannate nanostructures: growing a highly useful semiconductor

Figure 1: Scanning electron microscope images of ZTO microstructures: (a) low
magnification image of the Zn2SnO4 octahedrons; (b) ZnSn(OH)6 cubes formed in the initial
stage of the reaction (note secondary nucleation on the cube surfaces); (c) a Zn2SnO4 octahedron;
(d) coalescing nanoplates. (Reproduced with permission, © 2010 Elsevier B.V.)
Figure 1: Scanning electron microscope images of ZTO microstructures: (a) low magnification image of the Zn2SnO4 octahedrons; (b) ZnSn(OH)6 cubes formed in the initial stage of the reaction (note secondary nucleation on the cube surfaces); (c) a Zn2SnO4 octahedron; (d) coalescing nanoplates. (Reproduced with permission, © 2010 Elsevier B.V.)

Abstract:
This timely review focuses on the synthesis of zinc stannate (zinc tin oxide: ZTO) nanostructures by the hydrothermal method, as well as the physical properties and applications of different zinc stannate nanostructures in solar cells, gas sensors, and photocatalysts.

Zinc stannate nanostructures: growing a highly useful semiconductor

Tsukuba, Japan | Posted on March 24th, 2011

The review is published in March 2011 in the journal Science and Technology of Advanced MaterialsVol. 12(2011) p. 013004. Itis presented by Sunandan Baruah and Joydeep Dutta from the Asian Institute of Technology, Klong Luang, Thailand.

Binary semiconducting oxide nanostructures, such as zinc oxide and titanium oxide, are widely used in sensors and catalysts. However, ternary semiconducting oxide nanostructures, which show higher electrical conductivity and are more stable than the binary type, are increasingly in demand for specific applications due to their particular physical properties. In contrast to conventional ‘top-down' processes involving physically breaking large macroscopic materials into nanoparticles, the chemically based ‘self-organization' approach offers an inexpensive and flexible means of precisely controlling the size, crystal structure and optoelectronic properties of semiconducting oxide nanostructures, which is crucial for the use of ZTO in specific applications.

ZTO nanostructures can be produced using a variety of methods including thermal evaporation, high-temperature calcination, mechanical grinding, sol-gel synthesis, hydrothermal reaction, and ion-exchange reaction. Different methods produce different ratios of ZTO oxides and impurities, expressed in alternative crystal structures. The authors describe the pertinent features of the hydrothermal growth method for synthesizing ZTO, including high purity of the stable zinc orthostannate Zn2SnO4 and the accompanying ‘cubic spinel' crystal structure. Moreover, hydrothermal growth is an attractive and relatively simple method since crystal growth occurs at mild temperatures in water.

Typical hydrothermal growth of ZTO nanostructures consists of using an aqueous mixture of a zinc salt, such as zinc nitrate or zinc chloride, and stannic chloride. This mixture is then reduced at 200-250 °C in sodium hydroxide or ammonium hydroxide in a high-pressure environment. Various methods for hydrothermal growth of ZTO nanostructures are detailed by the authors, with varying end products in terms of crystal structure and ‘phase composition' - amounts of the particular oxides produced.

The physical properties of ZTO depend on the method used for their synthesis. ZTO is a ‘wide-gap' semiconductor with a bandgap of around 3.6 eV, but the precise bandgap energy depends on the conditions of synthesis, which might result in quantum confinement effects arising from the small size of the nanostructures. Controlling the photoelectrochemical properties of ZTO has practical importance, and relating the optical and electronic properties of ZTO with the composition and crystal structure can pave the way for applications of other complex oxides.

The authors describe industrial applications arising from the photoelectrochemical properties of ZTO. Firstly, as a photocatalyst ZTO can be used for degrading harmful pesticides from ground water; secondly the porous nanostructures are ideal for gas sensing as they offer high surface to volume ratios; and thirdly ZTO has potential in the field of dye-sensitized solar cells, an economically plausible alternative to conventional solar cells. Given that only a few morphologies have been reported, the authors conjecture that within the next decade ZTO nanostructures will find uses in further industrial applications.

This review contains 131 references and 22 figures and provides an invaluable source of up-to-date information for newcomers and experts in this exciting area of research.

####

Contacts:
National Institute for Materials Science
Tsukuba, Japan
Email:
Tel. +81-(0)29-859-2494

Copyright © National Institute for Materials Science

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

[1] Sunandan Baruah and Joydeep Dutta, Zinc stannate nanostructures: hydrothermal synthesis, Sci. Technol. Adv. Mater.12 (2011) 013004

[2] Center of Excellence in Nanotechnology, School of Engineering and Technology, Asian Institute of Technology, Klong Luang, Pathumthani 12120, Thailand

Related News Press

News and information

Study reveals how herpes virus tricks the immune system February 5th, 2016

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

Chip Technology

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Scientists guide gold nanoparticles to form 'diamond' superlattices: DNA scaffolds cage and coax nanoparticles into position to form crystalline arrangements that mimic the atomic structure of diamond February 4th, 2016

Polar vortices observed in ferroelectric: New state of matter holds promise for ultracompact data storage and processing February 4th, 2016

Electrons and liquid helium advance understanding of zero-resistance: Study of electrons on liquid helium systems sheds light on zero-resistance phenomenon in semiconductors February 2nd, 2016

Sensors

Scientists have put a high precision blood assay into a simple test strip: Researchers have developed a new biosensor test system based on magnetic nanoparticles February 3rd, 2016

Nanosheet growth technique could revolutionize nanomaterial production February 1st, 2016

New record in nanoelectronics at ultralow temperatures January 28th, 2016

NBC LEARN DEBUTS SIX-PART VIDEO SERIES, “NANOTECHNOLOGY: SUPER SMALL SCIENCE” Produced by NBC Learn in partnership with the National Science Foundation, and narrated by NBC News/MSNBC’s Kate Snow, series highlights leading research in nanotechnology January 25th, 2016

Announcements

Study reveals how herpes virus tricks the immune system February 5th, 2016

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

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

Study reveals how herpes virus tricks the immune system February 5th, 2016

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

Energy

February 4th, 2016

Putting silicon 'sawdust' in a graphene cage boosts battery performance: Approach could remove major obstacles to increasing the capacity of lithium-ion batteries January 30th, 2016

Simplifying solar cells with a new mix of materials: Berkeley Lab-led research team creates a high-efficiency device in 7 steps January 29th, 2016

Scientists provide new guideline for synthesis of fullerene electron acceptors January 28th, 2016

Solar/Photovoltaic

Simplifying solar cells with a new mix of materials: Berkeley Lab-led research team creates a high-efficiency device in 7 steps January 29th, 2016

An alternative to platinum: Iron-nitrogen compounds as catalysts in graphene January 28th, 2016

Scientists provide new guideline for synthesis of fullerene electron acceptors January 28th, 2016

Nanostructural Changes in Solar Cells to Increase Their Efficiency January 28th, 2016

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







Car Brands
Buy website traffic