Pressure-Driven Interplay between Soft and Hard Components and Resultant Anisotropic and Topological Responses in a Pt Nanocube Assembled Rhombohedral Superlattice

Li, Ruipeng1; Zhu, Jinlong2; Ge, Binghui3; Wang, Zhongwu1

2023-11-02

10.1021/acs.chemmater.3c02386

CHEMISTRY OF MATERIALS   影响因子和分区

0897-4756

1520-5002

Synchrotron-based in situ pressure small- and wide-angle X-ray scattering and associated strain analysis reveal a pressure-driven anisotropic strain distribution across a Pt nanocube (NC) assembled supercrystal that has an obtuse rhombohedral superlattice. This strain anisotropy is largely controlled by the rational interplay between soft organic molecules and hard NC cores localized at various ratios in the four types of decoded NC arrangements. Upon compression below 10 GPa, the strain appears as a superlattice shrinkage, which is developed mainly at molecule-rich regimes in the facet-facet and nondirect-contact configurations of NC arrangement. Above 10 GPa, an anisotropic strain enhances and accordingly starts an apparent superlattice shrinkage at molecule-poor regimes in the corner-corner and edge-edge configurations, whereas an unusual superlattice expansion is simultaneously triggered in molecule-rich regimes. Upon the release of pressure, a normal superlattice expansion arises only at molecule-rich regimes, but a constant superlattice remains at molecule-poor regions, and below 2 GPa, a discontinuous jump occurs. In situ electrical resistance measurements of single supercrystals under pressure and electron microscopy imaging of harvested samples further reveal a pressure-induced phase switching between the insulator and conductor in a low dimension (1D or 2D) as defined at 10 GPa under compression and 2 GPa under decompression. This typical phase switching originates from a pressure-driven NC attachment and weak fusion and subsequently a decompression-induced NC detachment. This consequence is largely controlled by the development of a stable 2D Maxwell-like topological lattice through a small fraction of facet-facet and edge-edge attachments between slightly deflected NCs. These results provide insights into the anisotropic interplay between soft and hard components in nanobased architectures with response to the enhancement and manifestation of material properties.

SCI ; EI

英语

其他

NSF[DMR-1829070] ; NIGMS[1-P30-GM124166-01A1]

Chemistry ; Materials Science

Chemistry, Physical ; Materials Science, Multidisciplinary

WOS:001105147200001

AMER CHEMICAL SOC

20234815137756

Anisotropy ; Expansion ; Platinum ; Shrinkage ; Topology ; X ray scattering

Precious Metals:547.1 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3 ; High Energy Physics:932.1 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Cornell Univ, Cornell High Energy Synchrotron Source, Ithaca, NY 14853 USA
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
3.Anhui Univ, Inst Phys Sci & Informat Technol, Minist Educ, Key Lab Struct & Funct Regulat Hybrid Mat, Hefei 230601, Anhui, Peoples R China

Li, Ruipeng,Zhu, Jinlong,Ge, Binghui,et al. Pressure-Driven Interplay between Soft and Hard Components and Resultant Anisotropic and Topological Responses in a Pt Nanocube Assembled Rhombohedral Superlattice[J]. CHEMISTRY OF MATERIALS,2023,35(21):9412-9422.

Li, Ruipeng,Zhu, Jinlong,Ge, Binghui,&Wang, Zhongwu.(2023).Pressure-Driven Interplay between Soft and Hard Components and Resultant Anisotropic and Topological Responses in a Pt Nanocube Assembled Rhombohedral Superlattice.CHEMISTRY OF MATERIALS,35(21),9412-9422.

Li, Ruipeng,et al."Pressure-Driven Interplay between Soft and Hard Components and Resultant Anisotropic and Topological Responses in a Pt Nanocube Assembled Rhombohedral Superlattice".CHEMISTRY OF MATERIALS 35.21(2023):9412-9422.