Synthesis of freestanding HfO<sub>2 </sub>nanostructures
<p>Abstract</p> <p>Two new methods for synthesizing nanostructured HfO<sub>2 </sub>have been developed. The first method entails exposing HfTe<sub>2 </sub>powders to air. This simple process resulted in the formation of nanometer scale crystallites of HfO<...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2011-01-01
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| Series: | Nanoscale Research Letters |
| Online Access: | http://www.nanoscalereslett.com/content/6/1/294 |
| Summary: | <p>Abstract</p> <p>Two new methods for synthesizing nanostructured HfO<sub>2 </sub>have been developed. The first method entails exposing HfTe<sub>2 </sub>powders to air. This simple process resulted in the formation of nanometer scale crystallites of HfO<sub>2</sub>. The second method involved a two-step heating process by which macroscopic, freestanding nanosheets of HfO<sub>2 </sub>were formed as a byproduct during the synthesis of HfTe<sub>2</sub>. These highly two-dimensional sheets had side lengths measuring up to several millimeters and were stable enough to be manipulated with tweezers and other instruments. The thickness of the sheets ranged from a few to a few hundred nanometers. The thinnest sheets appeared transparent when viewed in a scanning electron microscope. It was found that the presence of Mn enhanced the formation of HfO<sub>2 </sub>by exposure to ambient conditions and was necessary for the formation of the large scale nanosheets. These results present new routes to create freestanding nanostructured hafnium dioxide.</p> <p><b>PACS: </b>81.07.-b, 61.46.Hk, 68.37.Hk.</p> |
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| ISSN: | 1931-7573 1556-276X |