Photomagnetic-chiral anisotropy of chiral nanostructured gold films

Liu, Zexi; Ai, Jing; Bai, Te; Fang, Yuxi; Ding, Kun; Duan, Yingying; Han, Lu; Che, Shunai

doi:10.1016/j.chempr.2021.10.003

Cited by 31 publications

(39 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then, let us move forward a single step to the CISS effect in the electron transfer process. According to the theoretical model of CISS, the effective magnetic field generated by the centripetal force acting on the moving carriers in the chiral potential can be large enough to be detected, considering the NCs’ small diameters at the nanometer scale . Therefore, to support our conjecture, the magnetic fields of the 3D/ S ( R )-PEA (OA) NCs were measured under 405 nm laser irradiation.…”

Section: Resultsmentioning

confidence: 72%

Core–Shell Three-Dimensional Perovskite Nanocrystals with Chiral-Induced Spin Selectivity for Room-Temperature Spin Light-Emitting Diodes

Jiang

Zou

et al. 2022

J. Am. Chem. Soc.

View full text Add to dashboard Cite

We developed type-II core−shell nanocrystals (NCs) with a chiral low-dimensional perovskite shell and an achiral 3D MAPbBr 3 core. The core−shell NCs exhibit spin-polarized luminescence at the first excitation band of the achiral core, which is due to the chiral-induced spin selectivity (CISS) effect-governed spin-dependent shell-to-core electron transportation and the subsequent electron− hole recombination in the core. The preferred spin state of the transferred electrons is determined by the handness of the chiral shell. For the core−shell NCs film, a photoluminescence quantum yield (PLQY) of 54% and a circularly polarized luminescence (CPL) with a maximum |g lum | of 4.0 × 10 −3 are obtained at room temperature. Finally, we achieved a spin-polarized light-emitting diode (spin-LED), affording a circularly polarized electroluminescence (CP-EL) with a |g CP-EL | of 6.0 × 10 −3 under ambient conditions.

show abstract

Section: Resultsmentioning

confidence: 72%

Core–Shell Three-Dimensional Perovskite Nanocrystals with Chiral-Induced Spin Selectivity for Room-Temperature Spin Light-Emitting Diodes

Jiang

Zou

et al. 2022

J. Am. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…Recently, we developed new strategies, PM‐ChA [ 7 ] and SERS‐ChA [ 8 ] of chiral nanostructured Au films (CNAFs) to enantiomers, which demonstrated enantiomeric determination, based on the selective generation of photomagnetic fields (PMFs) and selective enhancement of Raman scattering of enantiomeric molecules on CNAFs, respectively. These methods are available for all the enantiomers regardless of their sizes, polarities, or chromophores, which overcome the drawbacks of chromatography and spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

“…Chiral spectroscopy is impossible to be used for enantioselective discrimination of racemates or chiral molecules with inherently weak optical response suffering from poor resolution and low sensitivity. [6] Recently, we developed new strategies, PM-ChA [7] and SERS-ChA [8] of chiral nanostructured Au films (CNAFs) to enantiomers, which demonstrated enantiomeric determination, based on the selective generation of photomagnetic fields (PMFs) and selective enhancement of Raman scattering of enantiomeric molecules on CNAFs, respectively. These methods are available for all the enantiomers regardless of their sizes, polarities, or chromophores, which overcome the drawbacks of chromatography and spectroscopy.Silver (Ag) nanomaterials show strong SPR effects and excellent electrical conductivity, making them promising for plasmonic sensing systems and optoelectronic devices.…”

mentioning

confidence: 99%

Chiral Nanostructured Bimetallic Au–Ag Films for Enantiomeric Discrimination

Deng

Duan

et al. 2022

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

circular dichroism, [3] electronic circular dichroism [4] and Raman optical activity, [5] has been used in both quantitative analysis and absolute configuration study of the enantiomers. However, the feasibility of enantiomeric discrimination by chiral chromatography strongly depends on molecular polarity and mass of enantiomers, which narrows applicable conditions and molecules for each chiral column. Chiral spectroscopy is impossible to be used for enantioselective discrimination of racemates or chiral molecules with inherently weak optical response suffering from poor resolution and low sensitivity. [6] Recently, we developed new strategies, PM-ChA [7] and SERS-ChA [8] of chiral nanostructured Au films (CNAFs) to enantiomers, which demonstrated enantiomeric determination, based on the selective generation of photomagnetic fields (PMFs) and selective enhancement of Raman scattering of enantiomeric molecules on CNAFs, respectively. These methods are available for all the enantiomers regardless of their sizes, polarities, or chromophores, which overcome the drawbacks of chromatography and spectroscopy.Silver (Ag) nanomaterials show strong SPR effects and excellent electrical conductivity, making them promising for plasmonic sensing systems and optoelectronic devices. [9] Therefore, doping with Ag should allow modulating the SPR and increasing conductivity of composite nanomaterials, which is expected to generate stronger local electromagnetic fields and further enhance the SERS intensities. This strategy provides the possibility for simultaneous enhancement of the PM-ChA and SERS-ChA effects of chiral noble metal nanomaterials. However, multi-metal compounding by the wet chemical deposition method sometimes suffers from difficulty in finding a reductant with appropriate reducing potential for simultaneous codeposition of metal ions in the precursor solution.Electrodeposition is a universal, efficient, and low-consumption technique for the preparation of Ag containing composite nanomaterials comparing with the other methods, [10] because deposition occurs in a very limited range on the electrode surface and the electrodeposition method allows precisely controlled reduction potential and duration time for Ag material preparation. [11] In addition, reduction reaction rates of different metal ions can be adjusted by changing the reduction potential, which makes them uniformly deposited Herein, the chiral nanostructured bimetallic Au-Ag films (CNAAFs) with both photomagnetic-chiral anisotropy to enantiomers (PM-ChA C-E ) and surface-enhanced Raman scattering-chiral anisotropy to enantiomers (SERS-ChA C-E ) for efficient enantiomeric discrimination are reported. The CNAAFs are synthesized by electrodeposition on n-type Si (n-Si) substrates with the assistance of N-acetyl-L/D-cysteine (S/R-NAC) as symmetry-breaking agents, which are consisted of polycrystalline Boerdijk-Coxeter-Bernal (BCB) tetrahelical structured Au-Ag alloy nanowires grown on n-Si substrates perpendicularly. The anisotropic factors of PM-ChA C-E ...

show abstract

“…During the past decades, a variety of chiral inorganic materials with various OAs have been investigated extensively, including refraction‐based OA with the phenomena of optical rotation (OR) in quartz, [ 4 ] NaClO 3 and NaBrO 3 , [ 5 ] reflection‐based OA that arising from the circular Bragg resonance and manifested as circular dichroism (CD) in chiral inorganic films of MgF 2 , [ 6 ] TiO 2 , [ 7 ] silica, [ 8 ] and gold, [ 9 ] absorption‐based OA that resulting in CD, and emission‐based OA exhibited circularly polarized emission in chiral nanostructured materials of MoS 2 , [ 10 ] GaAs, [ 11 ] and ZnO. [ 12 ] Multiple OAs including both scattering‐ and absorption‐based OAs were observed in chiral inorganic films that consisting of ZnO, [ 12 ] CuO, [ 13 ] NiO, [ 14 ] Fe 3 O 4 , [ 15 ] BiOBr, [ 16 ] silver, [ 17 ] gold, [ 18 ] and hydroxyapatite. [ 19 ] However, the absorption‐based OAs are limited in plasmonic absorption of chiral metallic nanomaterials [ 20 ] and electron transition absorption of chiral semiconductors at ultraviolet–visible (UV–vis) [ 21 ] and near‐infrared region, [ 22 ] although the response wavelength could be tunable depending on the composition of binary or ternary species.…”

Section: Introductionmentioning

confidence: 99%

Chiral Mesostructured Carbonate with Vibrational Circular Dichroism

Huang

Zhang

Han

et al. 2022

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

The absorption‐based optical activities (OA) of chiral inorganic materials without the assistance from organic molecules are limited in the plasmon of chiral metallic nanomaterials and the electron transition of chiral semiconductors at the ultraviolet–visible (UV–vis) region. In this work, chiral mesostructured manganese carbonate (CMMC) nano‐dumbbells with hierarchically chiral structures are synthesized, exhibiting vibrational circular dichroism (VCD) signals. CMMC powders are synthesized by a chiral‐molecule‐induced hydrothermal method. Three levels of hierarchical chirality exist in the CMMC, including primary twisted nanoflakes with distorted crystal lattices at the atomic level, secondary stacking of nanoflakes to form a nanoplate, and tertiary arranged nanoplates to form a twisting nano‐dumbbell. Antipodal CMMC samples exhibit antipodal VCD signals at the infrared region (IR) absorption 1400 and 860 cm–1, attributed to vibrational transitions in the asymmetric electric field and selective light harvesting in the hierarchically chiral structures.

show abstract

Photomagnetic-chiral anisotropy of chiral nanostructured gold films

Cited by 31 publications

References 27 publications

Core–Shell Three-Dimensional Perovskite Nanocrystals with Chiral-Induced Spin Selectivity for Room-Temperature Spin Light-Emitting Diodes

Core–Shell Three-Dimensional Perovskite Nanocrystals with Chiral-Induced Spin Selectivity for Room-Temperature Spin Light-Emitting Diodes

Chiral Nanostructured Bimetallic Au–Ag Films for Enantiomeric Discrimination

Chiral Mesostructured Carbonate with Vibrational Circular Dichroism

Contact Info

Product

Resources

About