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Threshold Pressure for Disappearance of Size-Induced Effect in Spinel-Structure Ge 3 N 4 Nanocrystals
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, Zhongwu Zhao, Yusheng Schiferl, David Qian, Jiang |
| Abstract | We demonstrate that the incompressibility of spinel Ge 3N4 nanocrystals decreases when the pressure is elevated above∼20 GPa. Ge 3N4 nanocrystals initially exhibit a higher bulk modulus of 381(2) GPa. But, above 20 GPa, the bulk modulus is apparently reduced to 268(4) GPa, which is similar to the reported bulk modulus of 208-296 GPa for the bulk Ge 3N4. Thus, a threshold pressure of ∼20 GPa was determined that signifies the onset of size-induced disappearance of elastic stiffness in nanocrystalline Ge 3N4. Enhanced surface energy contributions to the shell layers of nanoparticles and resulting effect on the corresponding large d spacing planes are used to elucidate the observed phenomenon. This study provides a reasonable explanation for the different compressibility properties of numerous nanocrystals. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.geo.arizona.edu/xtal/group/pdf/JPCB107_14151.pdf |
| Alternate Webpage(s) | http://www.geo.arizona.edu/xtal/group/pdf/JPCB_2-Dec-2003.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Greater Than or Equal To Modulus robot Nanocrystalline Materials Onset (audio) anatomical layer |
| Content Type | Text |
| Resource Type | Article |
