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Supercompliant and Soft (CH_{3}NH_{3})_{3}Bi_{2}I_{9} Crystal with Ultralow Thermal Conductivity.
Ma, Hao; Li, Chen; Ma, Yunwei; Wang, Heng; Rouse, Zachary W; Zhang, Zhuolei; Slebodnick, Carla; Alatas, Ahmet; Baker, Shefford P; Urban, Jeffrey J; Tian, Zhiting.
Afiliação
  • Ma H; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853, USA.
  • Li C; Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York 14853, USA.
  • Ma Y; Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, USA.
  • Wang H; Molecular Foundry, Lawrence Berkeley National Laboratories, Berkeley, California 94720, USA.
  • Rouse ZW; Department of Mechanical, Materials, and Aerospace Engineering, Illinois Institute of Technology, Chicago, Illinois 60616, USA.
  • Zhang Z; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.
  • Slebodnick C; Molecular Foundry, Lawrence Berkeley National Laboratories, Berkeley, California 94720, USA.
  • Alatas A; Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA.
  • Baker SP; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 64039, USA.
  • Urban JJ; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.
  • Tian Z; Molecular Foundry, Lawrence Berkeley National Laboratories, Berkeley, California 94720, USA.
Phys Rev Lett ; 123(15): 155901, 2019 Oct 11.
Article em En | MEDLINE | ID: mdl-31702321
In this Letter, we show the phonon dispersion of (CH_{3}NH_{3})_{3}Bi_{2}I_{9} single crystals at 300 K measured by inelastic x-ray scattering. The frequencies of acoustic phonons are among the lowest of crystals. Nanoindentation measurements verified that these crystals are very compliant and considerably soft. The frequency overlap between acoustic and optical phonons results in strong acoustic-optical scattering. All these features lead to an ultralow thermal conductivity. The fundamental knowledge obtained from this study will accelerate the design of novel hybrid materials for energy applications.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos País de publicação: Estados Unidos