Chiral Nanoparticles with Enhanced Thermal Stability of Chiral Structures through Alloying

Ma, Yicong1; Lin, Chao2; Cai, Linfeng1; Qu, Geping3; Bai, Xiaopeng2; Yang, Lin4; Huang, Zhifeng1,4,5

2022-02-01

10.1002/smll.202107657

Small   影响因子和分区

1613-6810

1613-6829

Metallic chiral nanoparticles (CNPs) promisingly function as asymmetric catalysts but lack an important study in thermal stability of optical activity that stems from metastable chiral lattices. In this work, annealing is applied to silver (Ag) CNPs, fabricated by glancing angle deposition (GLAD), and causes elimination of optical activity at 200 degrees C, mainly ascribed to chiral-to-achiral lattice transformation. The Ag CNPs are remarkedly enhanced in thermal stability through an alloying with aluminum (Al) via layer-by-layer GLAD to generate binary Ag0.5Al0.5 CNPs composed of solid-state liquids, whose optical activity vanishes at 700 degrees C. Ease in the diffusion of Al atoms in the host Ag CNPs and thermal insulation from the Al2O3 layers partially covering the binary CNPs effectively prohibit structural relaxation of the metastable chiral lattices, accounting for the significant enhancement in thermal stability of chiral lattices. This is a pioneering work to investigate the fundamental principles determining the thermal stability of metallic CNPs in terms of chiral structures and optical activity. It paves the way toward applying metallic CNPs to asymmetric catalysis at high temperature to accelerate an asymmetric synthesis of enantiomers with designable chirality, which is one of the most important topics in modern chemistry.

chiral lattices chiral nanoparticles glancing angle deposition optical activity thermal stability

SCI ; EI

英语

其他

Natural Science Foundation of Guangdong Province of China[2021A1515010045] ; Chinese Postdoctoral Science Foundation[2020M682915] ; [GRF/12200118] ; [GRF/12302320] ; [GRF/12301321] ; [NSFC/91856127] ; [NSFC/22075239]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000756704000001

WILEY-V C H VERLAG GMBH

20220811671958

Alloying ; Alumina ; Aluminum ; Aluminum oxide ; Binary alloys ; Crystal lattices ; Deposition ; Optical lattices ; Optical materials ; Silver ; Stereochemistry ; Thermal insulation ; Thermodynamic stability

Heat Insulating Materials:413.2 ; Metallurgy:531.1 ; Aluminum:541.1 ; Precious Metals:547.1 ; Thermodynamics:641.1 ; Optical Devices and Systems:741.3 ; Laser Beam Interactions:744.8 ; Nanotechnology:761 ; Chemistry:801 ; Chemical Operations:802.3 ; Inorganic Compounds:804.2 ; Solid State Physics:933 ; Crystal Lattice:933.1.1

Web of Science

1.Hong Kong Baptist Univ HKBU, Dept Phys, Kowloon Tong, Hong Kong, Peoples R China
2.Chinese Univ Hong Kong CUHK, Dept Phys, Sha Tin, Hong Kong, Peoples R China
3.Southern Univ Sci & Technol SUSTech, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
4.HKBU Inst Res & Continuing Educ, Shenzhen 518057, Guangdong, Peoples R China
5.Hong Kong Baptist Univ HKBU, Golden Meditech Ctr NeuroRegenerat Sci, Inst Adv Mat, State Key Lab Environm & Biol Anal,Kowloon Tong, Hong Kong, Peoples R China

Ma, Yicong,Lin, Chao,Cai, Linfeng,et al. Chiral Nanoparticles with Enhanced Thermal Stability of Chiral Structures through Alloying[J]. Small,2022,18.

Ma, Yicong.,Lin, Chao.,Cai, Linfeng.,Qu, Geping.,Bai, Xiaopeng.,...&Huang, Zhifeng.(2022).Chiral Nanoparticles with Enhanced Thermal Stability of Chiral Structures through Alloying.Small,18.

Ma, Yicong,et al."Chiral Nanoparticles with Enhanced Thermal Stability of Chiral Structures through Alloying".Small 18(2022).