51
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Abstract
Synergistic utilization of TiO2-photo-generated holes and electrons is a potential protocol for catalytic C–C bond formation reactions.
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Affiliation(s)
- Dongge Ma
- School of Science
- Beijing Technology and Business University
- Beijing
- P. R. China
| | - Anan Liu
- Key Laboratory of Photochemistry
- Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Shuhong Li
- School of Science
- Beijing Technology and Business University
- Beijing
- P. R. China
| | - Chichong Lu
- School of Science
- Beijing Technology and Business University
- Beijing
- P. R. China
| | - Chuncheng Chen
- Key Laboratory of Photochemistry
- Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry, Chinese Academy of Sciences
- Beijing
- P. R. China
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52
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Puri M, Ferry VE. Circular Dichroism of CdSe Nanocrystals Bound by Chiral Carboxylic Acids. ACS NANO 2017; 11:12240-12246. [PMID: 29164858 DOI: 10.1021/acsnano.7b05690] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chiral semiconductor nanocrystals, or quantum dots (QDs), are promising materials for applications in biological sensing, photonics, and spin-polarized devices. Many of these applications rely on large dissymmetry, or g-factors, the difference in absorbance between left- and right-handed circularly polarized light compared to the unpolarized absorbance. The majority of chiral QDs, specifically CdSe, reported to date have used thiolated amino acid ligands to introduce chirality onto the nanoparticles, but these systems have ultimately reported small g-factors of ∼2 × 10-4. In an effort to realize chiral CdSe QDs with higher g-factors and to expand the set of designer chiral semiconductor nanocrystals, we have employed chiral carboxylic acids as a distinct class of ligands for chiral CdSe nanoparticles. Through this family of chiral carboxylic acid ligands, we performed a direct comparison between carboxylate-bound and thiolate-bound chiral CdSe QDs. Spectral analysis revealed that the resulting circular dichroism shifts originate from the splitting of the exciton by the ligand-nanocrystal interaction. Subsequent examination of a series of chiral carboxylic acid ligands revealed a 30-fold range in g-factor through relatively small changes in the structure of the ligand. Finally, we showed that increasing the number of stereocenters on the ligand can further enhance the dissymmetry factors. This versatile and tunable combination of nanocrystals and ligands will inform future designs of chiral nanomaterials and their applications.
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Affiliation(s)
- Mayank Puri
- Department of Chemical Engineering and Materials Science University of Minnesota , 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Vivian E Ferry
- Department of Chemical Engineering and Materials Science University of Minnesota , 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
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53
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Chwojnowska E, Wolska-Pietkiewicz M, Grzonka J, Lewiński J. An organometallic route to chiroptically active ZnO nanocrystals. NANOSCALE 2017; 9:14782-14786. [PMID: 28767107 DOI: 10.1039/c7nr02843a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The unique optical properties of zinc oxide nanocrystals (ZnO NCs) are strongly dependent on both the properties and the composition of the inorganic core-organic ligand interface. Developing a novel organometallic self-supporting approach, we report on the synthesis and characterization of ZnO nanocrystals coated by chiral monoanionic aminoalcoholate ligands. The resulting ZnO NCs are both chiroptically active and possess size dependent optical properties. The size and in consequence the emission color of the ZnO NCs could be simply adjusted by the characteristic of the aminoalcohol used.
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Affiliation(s)
- Elżbieta Chwojnowska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. and Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | | | - Justyna Grzonka
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. and Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland
| | - Janusz Lewiński
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. and Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
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54
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Liu J, Yang L, Zhang H, Wang J, Huang Z. Ultraviolet-Visible Chiroptical Activity of Aluminum Nanostructures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1701112. [PMID: 28783232 DOI: 10.1002/smll.201701112] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 06/30/2017] [Indexed: 06/07/2023]
Abstract
Ultraviolet (UV)-resonant metals (e.g., aluminum) typically have low melting point to cause a fabrication difficulty in helical sculpture to generate plasmons with chiroptical activity in the UV region. In this work, using glancing angle deposition (GLAD), two new methods are devised to generate crystalline chiral Al nanostructures that have stable chiroptical response in the UV-visible region originating from intrinsic helical structures. One approach involves fast substrate rotation during GLAD to fabricate Al nanoparticles (AlNPs) with hidden helicity; another is to deposit an achiral Al thin film on a host of plasmonic chiral NPs, such that the helical structures are duplicated from the chiral host to the achiral guest of Al nanocappings. The host@guest helicity duplication is a new GLAD methodology to generate chiroptically active plasmons, which can be generally adapted to diverse plasmonic metals for tailoring plasmonic chiroptical activity flexibly in the UV-visible region. More importantly, this work offers those two new methods to generate UV-active plasmonic chiral substrates, which can markedly enhance chiroptical activity of biomolecules. It would open a door to develop surface-enhanced chiroptical spectroscopies for sensitively monitoring stereobiochemical information, which is of prominent interest in understanding a wide range of homochirality-determined biological phenomena.
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Affiliation(s)
- Junjun Liu
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China
| | - Lin Yang
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China
| | - Han Zhang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Zhifeng Huang
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, China
- Institute of Advanced Materials, Partner State Key Laboratory of Environmental and Biological Analysis, HKBU, Kowloon Tong, Kowloon, Hong Kong SAR, China
- HKBU Institute of Research and Continuing Education, 9F, the Industrialization Complex of Shenzhen Virtual University Park, No. 2 Yuexing 3rd Road, South Zone, Hi-Tech Industrial Park Nanshan District, Shenzhen, 518057, Guangdong Province, China
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55
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Purcell-Milton F, Visheratina AK, Kuznetsova VA, Ryan A, Orlova AO, Gun'ko YK. Impact of Shell Thickness on Photoluminescence and Optical Activity in Chiral CdSe/CdS Core/Shell Quantum Dots. ACS NANO 2017; 11:9207-9214. [PMID: 28820937 DOI: 10.1021/acsnano.7b04199] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Core/shell quantum dots (QDs) are of high scientific and technological importance as these nanomaterials have found a number of valuable applications. In this paper, we have investigated the dependence of optical activity and photoluminescence upon CdS shell thickness in a range of core-shell structured CdSe/CdS QDs capped with chiral ligands. For our study, five samples of CdSe/CdS were synthesized utilizing successive ion layer adsorption and reaction to vary the thickness of the CdS shell from 0.5 to 2 nm, upon a 2.8 nm diameter CdSe core. Following this, a ligand exchange of the original aliphatic ligands with l- and d-cysteine was carried out, inducing a chiroptical response in these nanostructures. The samples were then characterized using circular dichroism, photoluminescent spectroscopy, and fluorescence lifetime spectroscopy. It has been found that the induced chiroptical response was inversely proportional to the CdS shell thickness and showed a distinct evolution in signal, whereas the photoluminescence of our samples showed a direct relationship to shell thickness. In addition, a detailed study of the influence of annealing time on the optical activity and photoluminescence quantum yield was performed. From our work, we have been able to clearly illustrate the approach and strategies that must be used when designing optimal photoluminescent optically active CdSe/CdS core-shell QDs.
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Affiliation(s)
- Finn Purcell-Milton
- School of Chemistry and CRANN, University of Dublin , Trinity College, Dublin 2, Ireland
| | | | - Vera A Kuznetsova
- School of Chemistry and CRANN, University of Dublin , Trinity College, Dublin 2, Ireland
- ITMO University , St. Petersburg 197101, Russia
| | - Aisling Ryan
- School of Chemistry and CRANN, University of Dublin , Trinity College, Dublin 2, Ireland
| | | | - Yurii K Gun'ko
- School of Chemistry and CRANN, University of Dublin , Trinity College, Dublin 2, Ireland
- ITMO University , St. Petersburg 197101, Russia
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56
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Jiang S, Chekini M, Qu ZB, Wang Y, Yeltik A, Liu Y, Kotlyar A, Zhang T, Li B, Demir HV, Kotov NA. Chiral Ceramic Nanoparticles and Peptide Catalysis. J Am Chem Soc 2017; 139:13701-13712. [PMID: 28803469 DOI: 10.1021/jacs.7b01445] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The chirality of nanoparticles (NPs) and their assemblies has been investigated predominantly for noble metals and II-VI semiconductors. However, ceramic NPs represent the majority of nanoscale materials in nature. The robustness and other innate properties of ceramics offer technological opportunities in catalysis, biomedical sciences, and optics. Here we report the preparation of chiral ceramic NPs, as represented by tungsten oxide hydrate, WO3-x·H2O, dispersed in ethanol. The chirality of the metal oxide core, with an average size of ca. 1.6 nm, is imparted by proline (Pro) and aspartic acid (Asp) ligands via bio-to-nano chirality transfer. The amino acids are attached to the NP surface through C-O-W linkages formed from dissociated carboxyl groups and through amino groups weakly coordinated to the NP surface. Surprisingly, the dominant circular dichroism bands for NPs coated by Pro and Asp are different despite the similarity in the geometry of the NPs; they are positioned at 400-700 nm and 500-1100 nm for Pro- and Asp-modified NPs, respectively. The differences in the spectral positions of the main chiroptical band for the two types of NPs are associated with the molecular binding of the two amino acids to the NP surface; Asp has one additional C-O-W linkage compared to Pro, resulting in stronger distortion of the inorganic crystal lattice and greater intensity of CD bands associated with the chirality of the inorganic core. The chirality of WO3-x·H2O atomic structure is confirmed by atomistic molecular dynamics simulations. The proximity of the amino acids to the mineral surface is associated with the catalytic abilities of WO3-x·H2O NPs. We found that NPs facilitate formation of peptide bonds, leading to Asp-Asp and Asp-Pro dipeptides. The chiroptical activity, chemical reactivity, and biocompatibility of tungsten oxide create a unique combination of properties relevant to chiral optics, chemical technologies, and biomedicine.
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Affiliation(s)
- Shuang Jiang
- School of Chemical Engineering and Technology, Tianjin Key Laboratory of Applied Catalysis Science and Technology, Tianjin University , Tianjin 300354, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300354, China.,Tianjin Engineering Research Center of Functional Fine Chemicals , Tianjin 300354, China
| | | | | | | | - Aydan Yeltik
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM, Bilkent University , 06800 Ankara, Turkey
| | - Yuangang Liu
- College of Chemical Engineering, Huaqiao University , Xiamen 361021, China
| | | | - Tianyong Zhang
- School of Chemical Engineering and Technology, Tianjin Key Laboratory of Applied Catalysis Science and Technology, Tianjin University , Tianjin 300354, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300354, China.,Tianjin Engineering Research Center of Functional Fine Chemicals , Tianjin 300354, China
| | - Bin Li
- School of Chemical Engineering and Technology, Tianjin Key Laboratory of Applied Catalysis Science and Technology, Tianjin University , Tianjin 300354, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300354, China.,Tianjin Engineering Research Center of Functional Fine Chemicals , Tianjin 300354, China
| | - Hilmi Volkan Demir
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM, Bilkent University , 06800 Ankara, Turkey.,School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, Nanyang Technological University , 639798 Singapore
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57
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Kuno J, Kawai T, Nakashima T. The effect of surface ligands on the optical activity of mercury sulfide nanoparticles. NANOSCALE 2017; 9:11590-11595. [PMID: 28770926 DOI: 10.1039/c7nr02603j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mercury sulfide (HgS) nanoparticles (NPs) were prepared in the presence of water-soluble thiols as capping ligands in aqueous solutions. Chiral thiol ligands successfully afforded the formation of the chiral cinnabar phase (α-HgS), leading to optically active NPs, while two achiral thiols preserved β-HgS NPs with an achiral crystalline system. The profiles of UV-vis absorption and circular dichroism (CD) spectra of chiral NPs were dependent on the chemical structures of the chiral ligands. Cysteine-based derivatives gave HgS NPs demonstrating almost mirror image CD profiles even though they possess identical stereochemistry. The water soluble chiral ligands on the NPs were replaced with an achiral ligand, 1-dodecanethiol, by the spontaneous phase transfer method. The ligand-exchanged NPs with the achiral thiol preserved the optical activity with a feature of the CD profile similar to that of the original NPs in water, demonstrating the chiral memory effect in the NP-core. The dissymmetry factor in optical absorption decreased by almost half, which could be attributed to the amorphous phase formed by the chemical etching with an excess amount of dodecanethiol. The optical activity showed a higher thermal stability compared to that of NPs before the ligand-exchange.
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Affiliation(s)
- Jumpei Kuno
- Graduate School of Materials Science, Nara Institute of Science and Technology, NAIST, Ikoma, Nara 630-0192, Japan.
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58
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Tepliakov NV, Baimuratov AS, Vovk IA, Leonov MY, Baranov AV, Fedorov AV, Rukhlenko ID. Chiral Optical Properties of Tapered Semiconductor Nanoscrolls. ACS NANO 2017; 11:7508-7515. [PMID: 28696663 DOI: 10.1021/acsnano.7b04032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Large surface-to-volume ratio, one-dimensional quantum confinement, and strong optical activity make chiral nanoscrolls ideal for the detection and sensing of small chiral molecules. Here, we present a simple physical model of chiroptical phenomena in multilayered tapered semiconductor nanoscrolls. Our model is based on a linear transformation of coordinates, which converts nanoscrolls into flat but topologically distorted nanoplatelets whose optical properties can then be treated analytically. As an illustrative application example, we analyze absorption and circular dichroism spectra of CdSe nanoscrolls using an eight-band model of CdSe. We show that the optical activity of the nanoscrolls originates from the chiral distortion of their crystal lattice and determine selection rules for the optically active interband transitions. The results of our study may prove useful for the modeling and design of semiconductor nanoscrolls and nanoscroll-based materials.
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Affiliation(s)
- Nikita V Tepliakov
- Center of Information Optical Technologies, ITMO University , Saint Petersburg 197101, Russia
| | - Anvar S Baimuratov
- Center of Information Optical Technologies, ITMO University , Saint Petersburg 197101, Russia
| | - Ilia A Vovk
- Center of Information Optical Technologies, ITMO University , Saint Petersburg 197101, Russia
| | - Mikhail Yu Leonov
- Center of Information Optical Technologies, ITMO University , Saint Petersburg 197101, Russia
| | - Alexander V Baranov
- Center of Information Optical Technologies, ITMO University , Saint Petersburg 197101, Russia
| | - Anatoly V Fedorov
- Center of Information Optical Technologies, ITMO University , Saint Petersburg 197101, Russia
| | - Ivan D Rukhlenko
- Center of Information Optical Technologies, ITMO University , Saint Petersburg 197101, Russia
- Monash University , Clayton Campus, Clayton, Victoria 3800, Australia
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59
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Gao X, Zhang X, Deng K, Han B, Zhao L, Wu M, Shi L, Lv J, Tang Z. Excitonic Circular Dichroism of Chiral Quantum Rods. J Am Chem Soc 2017; 139:8734-8739. [DOI: 10.1021/jacs.7b04224] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaoqing Gao
- CAS
Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center
for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
| | - Xiuwen Zhang
- Shenzhen
Key Laboratory of Micro-Nano Photonic Information Technology, College
of Electronic Science and Technology, Shenzhen University, Guangdong 518060, People’s Republic of China
| | - Ke Deng
- CAS
Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center
for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
| | - Bing Han
- CAS
Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center
for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
| | - Luyang Zhao
- National
Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, People’s Republic of China
| | - Minghui Wu
- Department
of Physics, South University of Science and Technology of China, Shenzhen, Guangdong 518055, People’s Republic of China
| | - Lin Shi
- CAS
Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center
for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
| | - Jiawei Lv
- CAS
Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center
for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
| | - Zhiyong Tang
- CAS
Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center
for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, People’s Republic of China
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60
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Kuznetsova V, Visheratina A, Ryan A, Martynenko I, Loudon A, Maguire C, Purcell-Milton F, Orlova A, Baranov A, Fedorov A, Prina-Mello A, Volkov Y, Gun'Ko Y. Enantioselective cytotoxicity of ZnS:Mn quantum dots in A549 cells. Chirality 2017; 29:403-408. [DOI: 10.1002/chir.22713] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 03/22/2017] [Accepted: 04/05/2017] [Indexed: 12/13/2022]
Affiliation(s)
| | - A.K. Visheratina
- Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - A. Ryan
- Chemistry School, Trinity College Dublin; Dublin Ireland
| | - I.V. Martynenko
- Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - A. Loudon
- Chemistry School, Trinity College Dublin; Dublin Ireland
| | - C.M. Maguire
- Clinical Medicine, School of Medicine; Trinity College Dublin; Dublin Ireland
| | | | - A.O. Orlova
- Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - A.V. Baranov
- Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - A.V. Fedorov
- Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - A. Prina-Mello
- Clinical Medicine, School of Medicine; Trinity College Dublin; Dublin Ireland
| | - Y. Volkov
- Clinical Medicine, School of Medicine; Trinity College Dublin; Dublin Ireland
| | - Y.K. Gun'Ko
- Chemistry School, Trinity College Dublin; Dublin Ireland
- Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
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61
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Liu XL, Tsunega S, Jin RH. Self-directing chiral information in solid-solid transformation: unusual chiral-transfer without racemization from amorphous silica to crystalline silicon. NANOSCALE HORIZONS 2017; 2:147-155. [PMID: 32260658 DOI: 10.1039/c6nh00214e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Constructing novel chiral inorganic nanomaterials is an emerging branch in chirality research. In this work, by employing a solid magnesiothermic reaction at 500-600 °C, we reduced chiral SiO2 nanofibers with average diameter ∼10 nm into chiral Si nanoplates with a size of about several hundred nm. The chirality of the as-prepared Si was judged by the pair of signals with a mirror relationship between 400-500 nm that appeared on the solid-state diffuse reflectance circular dichroism (DRCD) spectra for the l- and d-form Si. Furthermore, the chirality was also confirmed by induced vibrational circular dichroism (VCD) signals corresponding to the absorption bands in the infrared range of achiral organics (polyvinylpyrrolidone K90 and trimethoxyphenylsilane) absorbed onto chiral Si. The as-used SiO2 nanofibers possessed an ultra high-temperature (up to 900 °C) resistant chirality, which would be due to the asymmetric arrangement of Si and O atoms in small chiral domains (<10 nm) on the Si-O-Si network of SiO2. During the removal of oxygen atoms from Si-O-Si by Mg atoms, the arrangement of newly formed Si-Si bonds as well as the growth of Si crystals were still templated without racemization from the chiral information in SiO2. Consequently, the subnano/nano-scale (<10 nm) chiral information was in situ transferred via the so-called self-transfer mechanism, even though there was no retention of the outward shapes of the length-scale nanofiber SiO2 reactants in the Si products. This work offers a feasible chemical method to prepare chiral Si using abundant SiO2 raw materials.
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Affiliation(s)
- Xin-Ling Liu
- Department of Material and Life Chemistry, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
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62
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Ma W, Xu L, de Moura AF, Wu X, Kuang H, Xu C, Kotov NA. Chiral Inorganic Nanostructures. Chem Rev 2017; 117:8041-8093. [DOI: 10.1021/acs.chemrev.6b00755] [Citation(s) in RCA: 485] [Impact Index Per Article: 69.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | | | - André F. de Moura
- Department
of Chemistry, Federal University of São Carlos, CP 676, CEP 13.565-905, São Carlos, SP, Brazil
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63
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Wang PP, Yu SJ, Ouyang M. Assembled Suprastructures of Inorganic Chiral Nanocrystals and Hierarchical Chirality. J Am Chem Soc 2017; 139:6070-6073. [DOI: 10.1021/jacs.7b02523] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Peng-peng Wang
- Department
of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742, United States
| | - Shang-Jie Yu
- Department
of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742, United States
- Department
of Electrical and Computer Engineering, University of Maryland, College
Park, Maryland 20742, United States
| | - Min Ouyang
- Department
of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742, United States
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64
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Baimuratov AS, Tepliakov NV, Gun'Ko YK, Shalkovskiy AG, Baranov AV, Fedorov AV, Rukhlenko ID. Intraband optical activity of semiconductor nanocrystals. Chirality 2017; 29:159-166. [DOI: 10.1002/chir.22685] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 12/26/2016] [Accepted: 01/14/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Anvar S. Baimuratov
- Department of Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - Nikita V. Tepliakov
- Department of Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - Yurii K. Gun'Ko
- Department of Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
- School of Chemistry and CRANN Institute; Trinity College; Dublin Ireland
| | - Alexey G. Shalkovskiy
- Saint Petersburg; Saint Petersburg State University; Russia
- Institute for Design Problems in Microelectronics of Russian Academy of Sciences; Moscow Russia
| | - Alexander V. Baranov
- Department of Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - Anatoly V. Fedorov
- Department of Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
| | - Ivan D. Rukhlenko
- Department of Optical Physics and Modern Natural Science; ITMO University; Saint Petersburg Russia
- Monash University; Clayton Campus; Victoria Australia
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65
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Feng W, Kim JY, Wang X, Calcaterra HA, Qu Z, Meshi L, Kotov NA. Assembly of mesoscale helices with near-unity enantiomeric excess and light-matter interactions for chiral semiconductors. SCIENCE ADVANCES 2017; 3:e1601159. [PMID: 28275728 PMCID: PMC5332156 DOI: 10.1126/sciadv.1601159] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Accepted: 12/15/2016] [Indexed: 05/20/2023]
Abstract
Semiconductors with chiral geometries at the nanoscale and mesoscale provide a rich materials platform for polarization optics, photocatalysis, and biomimetics. Unlike metallic and organic optical materials, the relationship between the geometry of chiral semiconductors and their chiroptical properties remains, however, vague. Homochiral ensembles of semiconductor helices with defined geometries open the road to understanding complex relationships between geometrical parameters and chiroptical properties of semiconductor materials. We show that semiconductor helices can be prepared with an absolute yield of ca 0.1% and an enantiomeric excess (e.e.) of 98% or above from cysteine-stabilized cadmium telluride nanoparticles (CdTe NPs) dispersed in methanol. This high e.e. for a spontaneously occurring chemical process is attributed to chiral self-sorting based on the thermodynamic preference of NPs to assemble with those of the same handedness. The dispersions of homochiral self-assembled helices display broadband visible and near-infrared (Vis-NIR) polarization rotation with anisotropy (g) factors approaching 0.01. Calculated circular dichroism (CD) spectra accurately reproduced experimental CD spectra and gave experimentally validated spectral predictions for different geometrical parameters enabling de novo design of chiroptical semiconductor materials. Unlike metallic, ceramic, and polymeric helices that serve predominantly as scatterers, chiroptical properties of semiconductor helices have nearly equal contribution of light absorption and scattering, which is essential for device-oriented, field-driven light modulation. Deconstruction of a helix into a series of nanorods provides a simple model for the light-matter interaction and chiroptical activity of helices. This study creates a framework for further development of polarization-based optics toward biomedical applications, telecommunications, and hyperspectral imaging.
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Affiliation(s)
- Wenchun Feng
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Ji-Young Kim
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Xinzhi Wang
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Heather A. Calcaterra
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Zhibei Qu
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Louisa Meshi
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Nicholas A. Kotov
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Corresponding author.
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66
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Gao F, Ma S, Xiao X, Hu Y, Zhao D, He Z. Sensing tyrosine enantiomers by using chiral CdSe/CdS quantum dots capped with N-acetyl-l-cysteine. Talanta 2017; 163:102-110. [DOI: 10.1016/j.talanta.2016.10.091] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 10/13/2016] [Accepted: 10/23/2016] [Indexed: 11/16/2022]
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67
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Kumar J, Kawai T, Nakashima T. Circularly polarized luminescence in chiral silver nanoclusters. Chem Commun (Camb) 2017; 53:1269-1272. [DOI: 10.1039/c6cc09476g] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Sets of mirror image circular dichroism (CD) and circularly polarized luminescence (CPL) spectra are for the first time demonstrated using enantiomeric dihydrolipoic acid (DHLA)-capped silver nanoclusters.
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Affiliation(s)
- Jatish Kumar
- Graduate School of Materials Science
- Nara Institute of Science and Technology
- Ikoma
- Japan
| | - Tsuyoshi Kawai
- Graduate School of Materials Science
- Nara Institute of Science and Technology
- Ikoma
- Japan
| | - Takuya Nakashima
- Graduate School of Materials Science
- Nara Institute of Science and Technology
- Ikoma
- Japan
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68
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Ben-Moshe A, Teitelboim A, Oron D, Markovich G. Probing the Interaction of Quantum Dots with Chiral Capping Molecules Using Circular Dichroism Spectroscopy. NANO LETTERS 2016; 16:7467-7473. [PMID: 27960517 PMCID: PMC5207631 DOI: 10.1021/acs.nanolett.6b03143] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Circular dichroism (CD) induced at exciton transitions by chiral ligands attached to single component and core/shell colloidal quantum dots (QDs) was used to study the interactions between QDs and their capping ligands. Analysis of the CD line shapes of CdSe and CdS QDs capped with l-cysteine reveals that all of the features in the complex spectra can be assigned to the different excitonic transitions. It is shown that each transition is accompanied by a derivative line shape in the CD response, indicating that the chiral ligand can split the exciton level into two new sublevels, with opposite angular momentum, even in the absence of an external magnetic field. The role of electrons and holes in this effect could be separated by experiments on various types of core/shell QDs, and it was concluded that the induced CD is likely related to interactions of the highest occupied molecular orbitals of the ligands with the holes. Hence, CD was useful for the analysis of hole level-ligand interactions in quantum semiconductor heterostructures, with promising outlook toward better general understanding the properties of the surface of such systems.
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Affiliation(s)
- Assaf Ben-Moshe
- School of Chemistry,
Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ayelet Teitelboim
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Dan Oron
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 7610001, Israel
- E-mail:
| | - Gil Markovich
- School of Chemistry,
Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 6997801, Israel
- E-mail:
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69
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Baimuratov AS, Tepliakov NV, Gun'ko YK, Baranov AV, Fedorov AV, Rukhlenko ID. Mixing of quantum states: A new route to creating optical activity. Sci Rep 2016; 6:5. [PMID: 28442739 PMCID: PMC5431361 DOI: 10.1038/s41598-016-0017-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 08/18/2016] [Indexed: 01/06/2023] Open
Abstract
The ability to induce optical activity in nanoparticles and dynamically control its strength is of great practical importance due to potential applications in various areas, including biochemistry, toxicology, and pharmaceutical science. Here we propose a new method of creating optical activity in originally achiral quantum nanostructures based on the mixing of their energy states of different parities. The mixing can be achieved by selective excitation of specific states or via perturbing all the states in a controllable fashion. We analyze the general features of the so produced optical activity and elucidate the conditions required to realize the total dissymmetry of optical response. The proposed approach is applicable to a broad variety of real systems that can be used to advance chiroptical devices and methods.
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Affiliation(s)
| | | | - Yurii K Gun'ko
- ITMO University, 197101, Saint Petersburg, Russia
- School of Chemistry and CRANN Institute, Trinity College, Dublin, Dublin 2, Ireland
| | | | | | - Ivan D Rukhlenko
- ITMO University, 197101, Saint Petersburg, Russia.
- Monash University, Clayton Campus, Victoria, 3800, Australia.
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70
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Rukhlenko ID, Tepliakov NV, Baimuratov AS, Andronaki SA, Gun’ko YK, Baranov AV, Fedorov AV. Completely Chiral Optical Force for Enantioseparation. Sci Rep 2016; 6:36884. [PMID: 27827437 PMCID: PMC5101807 DOI: 10.1038/srep36884] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 10/24/2016] [Indexed: 11/25/2022] Open
Abstract
Fast and reliable separation of enantiomers of chiral nanoparticles requires elimination of all the forces that are independent of the nanoparticle handedness and creation of a sufficiently strong force that either pushes different enantiomers in opposite directions or delays the diffusion of one of them with respect to the other. Here we show how to construct such a completely chiral optical force using two counterpropagating circularly polarized plane waves of opposite helicities. We then explore capabilities of the related enantioseparation method by analytically solving the problem of the force-induced diffusion of chiral nanoparticles in a confined region, and reveal that it results in exponential spatial dependencies of the quantities measuring the purity of chiral substances. The proposed concept of a completely chiral optical force can potentially advance enantioseparation and enantiopurification techniques for all kinds of chiral nanoparticles that strongly interact with light.
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Affiliation(s)
- Ivan D. Rukhlenko
- Center of Information Optical Technologies, ITMO University, Saint Petersburg 197101, Russia
- Monash University, Clayton Campus, Victoria 3800, Australia
| | - Nikita V. Tepliakov
- Center of Information Optical Technologies, ITMO University, Saint Petersburg 197101, Russia
| | - Anvar S. Baimuratov
- Center of Information Optical Technologies, ITMO University, Saint Petersburg 197101, Russia
| | - Semen A. Andronaki
- Center of Information Optical Technologies, ITMO University, Saint Petersburg 197101, Russia
| | - Yurii K. Gun’ko
- Center of Information Optical Technologies, ITMO University, Saint Petersburg 197101, Russia
- School of Chemistry and CRANN Institute, Trinity College, Dublin, Ireland
| | - Alexander V. Baranov
- Center of Information Optical Technologies, ITMO University, Saint Petersburg 197101, Russia
| | - Anatoly V. Fedorov
- Center of Information Optical Technologies, ITMO University, Saint Petersburg 197101, Russia
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71
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Kumar J, Thomas KG, Liz-Marzán LM. Nanoscale chirality in metal and semiconductor nanoparticles. Chem Commun (Camb) 2016; 52:12555-12569. [PMID: 27752651 PMCID: PMC5317218 DOI: 10.1039/c6cc05613j] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 08/17/2016] [Indexed: 12/21/2022]
Abstract
The field of chirality has recently seen a rejuvenation due to the observation of chirality in inorganic nanomaterials. The advancements in understanding the origin of nanoscale chirality and the potential applications of chiroptical nanomaterials in the areas of optics, catalysis and biosensing, among others, have opened up new avenues toward new concepts and design of novel materials. In this article, we review the concept of nanoscale chirality in metal nanoclusters and semiconductor quantum dots, then focus on recent experimental and theoretical advances in chiral metal nanoparticles and plasmonic chirality. Selected examples of potential applications and an outlook on the research on chiral nanomaterials are additionally provided.
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Affiliation(s)
- Jatish Kumar
- CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastián, Spain. and School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM), CET Campus, Thiruvananthapuram, 695 016, India
| | - K George Thomas
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM), CET Campus, Thiruvananthapuram, 695 016, India
| | - Luis M Liz-Marzán
- CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia - San Sebastián, Spain. and Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
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72
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Mukhina MV, Baimuratov AS, Rukhlenko ID, Maslov VG, Purcell Milton F, Gun'ko YK, Baranov AV, Fedorov AV. Circular Dichroism of Electric-Field-Oriented CdSe/CdS Quantum Dots-in-Rods. ACS NANO 2016; 10:8904-8909. [PMID: 27556811 DOI: 10.1021/acsnano.6b04875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we report anisotropy of intrinsic chiroptical response in CdSe/CdS quantum dot-in-rod systems. These nanostructures being oriented in an external electric field demonstrate dependence of circular dichroism signal on the orientation of the nanocrystals. The type of circular polarization in these nanostructures correlates with preferential direction of linear polarization, and the degree of circular polarization is the maximal for the first circular dichroism band corresponding to the absorption band edge. We also support our experimental data with a theoretical model. Using this model, we show a direct connection between theoretically derived morphological parameters of twisting in nanocrystals lattices and calculated from experimental data parameters of circular dichroism anisotropy.
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Affiliation(s)
- Maria V Mukhina
- Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia
| | - Anvar S Baimuratov
- Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia
| | - Ivan D Rukhlenko
- Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia
- Monash University, Clayton Campus , Victoria 3800, Australia
| | - Vladimir G Maslov
- Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia
| | - Finn Purcell Milton
- School of Chemistry and CRANN Institute, Trinity College, Dublin , Dublin 2, Ireland
| | - Yurii K Gun'ko
- Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia
- School of Chemistry and CRANN Institute, Trinity College, Dublin , Dublin 2, Ireland
| | - Alexander V Baranov
- Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia
| | - Anatoly V Fedorov
- Department of Optical Physics and Modern Natural Science, ITMO University , Saint Petersburg 197101, Russia
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73
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74
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Cecconello A, Kahn JS, Lu CH, Khosravi Khorashad L, Govorov AO, Willner I. DNA Scaffolds for the Dictated Assembly of Left-/Right-Handed Plasmonic Au NP Helices with Programmed Chiro-Optical Properties. J Am Chem Soc 2016; 138:9895-901. [PMID: 27428505 DOI: 10.1021/jacs.6b04096] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Within the broad interest of assembling chiral left- and right-handed helices of plasmonic nanoparticles (NPs), we introduce the DNA-guided organization of left- or right-handed plasmonic Au NPs on DNA scaffolds. The method involves the self-assembly of stacked 12 DNA quasi-rings interlinked by 30 staple-strands. By the functionalization of one group of staple units with programmed tether-nucleic acid strands and additional staple elements with long nucleic acid chains, acting as promoter strands, the promoter-guided assembly of barrels modified with 12 left- or right-handed tethers is achieved. The subsequent hybridization of Au NPs functionalized with single nucleic acid tethers yields left- or right-handed structures of plasmonic NPs. The plasmonic NP structures reveal CD spectra at the plasmon absorbance, and the NPs are imaged by HR-TEM. Using geometrical considerations corresponding to the left- and right-handed helices of the Au NPs, the experimental CD spectra of the plasmonic Au NPs are modeled by theoretical calculations.
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Affiliation(s)
- Alessandro Cecconello
- The Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - Jason S Kahn
- The Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - Chun-Hua Lu
- The Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | | | - Alexander O Govorov
- Department of Physics and Astronomy, Ohio University , Athens, Ohio 45701, United States
| | - Itamar Willner
- The Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
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75
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Bloom BP, Kiran V, Varade V, Naaman R, Waldeck DH. Spin Selective Charge Transport through Cysteine Capped CdSe Quantum Dots. NANO LETTERS 2016; 16:4583-9. [PMID: 27336320 DOI: 10.1021/acs.nanolett.6b01880] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
This work demonstrates that chiral imprinted CdSe quantum dots (QDs) can act as spin selective filters for charge transport. The spin filtering properties of chiral nanoparticles were investigated by magnetic conductive-probe atomic force microscopy (mCP-AFM) measurements and magnetoresistance measurements. The mCP-AFM measurements show that the chirality of the quantum dots and the magnetic orientation of the tip affect the current-voltage curves. Similarly, magnetoresistance measurements demonstrate that the electrical transport through films of chiral quantum dots correlates with the chiroptical properties of the QD. The spin filtering properties of chiral quantum dots may prove useful in future applications, for example, photovoltaics, spintronics, and other spin-driven devices.
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Affiliation(s)
- Brian P Bloom
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Vankayala Kiran
- Department of Chemical Physics, Weizmann Institute , Rehovot 76100, Israel
| | - Vaibhav Varade
- Department of Chemical Physics, Weizmann Institute , Rehovot 76100, Israel
| | - Ron Naaman
- Department of Chemical Physics, Weizmann Institute , Rehovot 76100, Israel
| | - David H Waldeck
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
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76
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Rukhlenko ID, Baimuratov AS, Tepliakov NV, Baranov AV, Fedorov AV. Shape-induced optical activity of chiral nanocrystals. OPTICS LETTERS 2016; 41:2438-2441. [PMID: 27244383 DOI: 10.1364/ol.41.002438] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a general approach to analyzing the optical activity of semiconductor nanocrystals of chiral shapes. By using a coordinate transformation that turns a chiral nanocrystal into a nanocuboid, we calculate the rotatory strengths, dissymmetry factors, and peak values of the circular dichroism (CD) signal upon intraband transitions inside the nanocrystal. It is shown that the atomic roughness of the nanocrystal surface can result in rotatory strengths as high as 10-36 erg×cm3 and in peak CD signals of about 0.1 cm-1 for typical nanocrystal densities of 1016 cm-3. The developed approach may prove useful for other nanocrystal shapes whereas the derived expressions apply directly for the modeling and interpretation of experimental CD spectra of quantum dots, nanorods, and nanoplatelets.
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77
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Mukhina MV, Korsakov IV, Maslov VG, Purcell-Milton F, Govan J, Baranov AV, Fedorov AV, Gun'ko YK. Molecular Recognition of Biomolecules by Chiral CdSe Quantum Dots. Sci Rep 2016; 6:24177. [PMID: 27063962 PMCID: PMC4827062 DOI: 10.1038/srep24177] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 03/21/2016] [Indexed: 12/29/2022] Open
Abstract
Molecular recognition is one of the most important phenomena in Chemistry and Biology. Here we present a new way of enantiomeric molecular recognition using intrinsically chiral semiconductor nanocrystals as assays. Real-time confocal microscopy studies supported by circular dichroism spectroscopy data and theoretical modelling indicate an ability of left-handed molecules of cysteine and, to a smaller extent, histidine and arginine to discriminate between surfaces of left- and right-handed nanocrystals.
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Affiliation(s)
| | | | | | - Finn Purcell-Milton
- School of Chemistry and CRANN, University of Dublin, Trinity College, Dublin 2, Ireland
| | - Joseph Govan
- School of Chemistry and CRANN, University of Dublin, Trinity College, Dublin 2, Ireland
| | | | | | - Yurii K Gun'ko
- ITMO University, St. Petersburg, 197101, Russia.,School of Chemistry and CRANN, University of Dublin, Trinity College, Dublin 2, Ireland
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78
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Choi JK, Haynie BE, Tohgha U, Pap L, Elliott KW, Leonard BM, Dzyuba SV, Varga K, Kubelka J, Balaz M. Chirality Inversion of CdSe and CdS Quantum Dots without Changing the Stereochemistry of the Capping Ligand. ACS NANO 2016; 10:3809-3815. [PMID: 26938741 DOI: 10.1021/acsnano.6b00567] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
L-cysteine derivatives induce and modulate the optical activity of achiral cadmium selenide (CdSe) and cadmium sulfide (CdS) quantum dots (QDs). Remarkably, N-acetyl-L-cysteine-CdSe and L-homocysteine-CdSe as well as N-acetyl-L-cysteine-CdS and L-cysteine-CdS showed "mirror-image" circular dichroism (CD) spectra regardless of the diameter of the QDs. This is an example of the inversion of the CD signal of QDs by alteration of the ligand's structure, rather than inversion of the ligand's absolute configuration. Non-empirical quantum chemical simulations of the CD spectra were able to reproduce the experimentally observed sign patterns and demonstrate that the inversion of chirality originated from different binding arrangements of N-acetyl-L-cysteine and L-homocysteine-CdSe to the QD surface. These efforts may allow the prediction of the ligand-induced chiroptical activity of QDs by calculating the specific binding modes of the chiral capping ligands. Combined with the large pool of available chiral ligands, our work opens a robust approach to the rational design of chiral semiconducting nanomaterials.
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Affiliation(s)
- Jung Kyu Choi
- Department of Chemistry, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Benjamin E Haynie
- Department of Chemistry, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Urice Tohgha
- Department of Chemistry, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Levente Pap
- Department of Chemistry, University of Wyoming , Laramie, Wyoming 82071, United States
| | - K Wade Elliott
- Department of Chemistry, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Brian M Leonard
- Department of Chemistry, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Sergei V Dzyuba
- Department of Chemistry and Biochemistry, Texas Christian University , Fort Worth, Texas 76129, United States
| | - Krisztina Varga
- Department of Chemistry, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Jan Kubelka
- Department of Chemistry, University of Wyoming , Laramie, Wyoming 82071, United States
| | - Milan Balaz
- Underwood International College, Integrated Science & Engineering Division, Yonsei University , Seoul 03722, Republic of Korea
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79
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Li J, Kotov NA. Circular extinction of plasmonic silver nanocaps and gas sensing. Faraday Discuss 2016; 186:345-52. [PMID: 26952921 DOI: 10.1039/c5fd00138b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral plasmonic nanostructures exhibit strong rotatory optical activity and are expected to enrich the field of metaoptical materials. Potential applications of chiroplasmonic nanostructures include circular polarizers, optical polarization detectors, asymmetric catalysts, and sensors. However, chiral plasmonic materials require subwavelength structural control and involve laborious chemical or lithographic procedures for their manufacturing. Moreover, strong rotatory activity of subwavelength structures whose chirality was imparted by microfabrication, has been obtained for the red and infrared parts of the spectrum but faces new challenges for the blue and violet spectral ranges even with plasmonic materials with plasmonic bands in the 200-400 nm window. In this study, we address this problem by preparing chiral subwavelength nanostructures by glancing angle sputtering of metallic silver on ZnO nanopillar arrays. Silver deposition in two different planes is a convenient method for preparation of silver chiroplasmonic nanocaps (Ag CPNCs) with controlled asymmetry. Circular dichroism spectroscopy was used to examine the circular extinction for the left-handed nanocaps (L-CPNCs) with understanding that not only circular dichroism but also many other optical effects contribute to the amplitude of these bands. The pillared silver films exhibit circular extinction in the violet area of the electromagnetic spectrum. Partial oxidation of Ag to AgxO causes the absorption and corresponding circular extinction band obtained using a conventional CD spectrometer at 400-525 nm to increase and shift. This optical material may be used to detect oxygen and extends the spectrum of application of chiroplasmonic materials to gas sensing.
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Affiliation(s)
- Jun Li
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA. and Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA and School of Chemical Engineering and Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Nicholas A Kotov
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109, USA. and Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, USA and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI 48109, USA and Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
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80
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Deng J, Fu J, Ng J, Huang Z. Tailorable chiroptical activity of metallic nanospiral arrays. NANOSCALE 2016; 8:4504-4510. [PMID: 26530309 DOI: 10.1039/c5nr06291h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The engineering of the chiroptical activity of the emerging chiral metamaterial, metallic nanospirals, is in its infancy. We utilize glancing angle deposition (GLAD) to facilely sculpture the helical structure of silver nanospirals (AgNSs), so that the scope of chiroptical engineering factors is broadened to include the spiral growth of homochiral AgNSs, the combination of left- and right-handed helical chirality to create heterochiral AgNSs, and the coil-axis alignment of the heterochiral AgNSs. It leads to flexible control over the chiroptical activity of AgNS arrays with respect to the sign, resonance wavelength and amplitude of circular dichroism (CD) in the UV and visible regime. The UV chiroptical mode has a distinct response from the visible mode. Finite element simulation together with LC circuit theory illustrates that the UV irradiation is mainly adsorbed in the metal and the visible is preferentially scattered by the AgNSs, accounting for the wavelength-related chiroptical distinction. This work contributes to broadening the horizons in understanding and engineering chiroptical responses, primarily desired for developing a wide range of potential chiroplasmonic applications.
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Affiliation(s)
- Junhong Deng
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China. and HKBU Institute of Research and Continuing Education, 9F, the Industrialization Complex of Shenzhen Virtual University Park, No. 2 Yuexing 3rd Road, South Zone, Hi-tech Industrial Park, Nanshan District, Shenzhen, Guangdong Province, P. R. China
| | - Junxue Fu
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China.
| | - Jack Ng
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China. and Institute of Computational and Theoretical Studies, HKBU, Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China and Institute of Advanced Materials, HKBU, Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China
| | - Zhifeng Huang
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China. and HKBU Institute of Research and Continuing Education, 9F, the Industrialization Complex of Shenzhen Virtual University Park, No. 2 Yuexing 3rd Road, South Zone, Hi-tech Industrial Park, Nanshan District, Shenzhen, Guangdong Province, P. R. China and Institute of Advanced Materials, HKBU, Kowloon Tong, Kowloon, Hong Kong SAR, P. R. China and Partner State Key Laboratory of Environmental and Biological Analysis, HKBU, Kowloon Tong, Kowloon, HongKong SAR, P. R. China
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81
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Melnikau D, Savateeva D, Gaponik N, Govorov AO, Rakovich YP. Chiroptical activity in colloidal quantum dots coated with achiral ligands. OPTICS EXPRESS 2016; 24:A65-A73. [PMID: 26832599 DOI: 10.1364/oe.24.000a65] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We studied the chiroptical properties of colloidal solution of CdSe and CdSe/ZnS quantum dots (QDs) with a cubic lattice structure which were initially prepared without use of any chiral molecules and coated with achiral ligands. We demonstrate circular dichroism (CD) activity around first and second excitonic transition of these CdSe based nanocrystals. We consider that this chiroptical activity is caused by imbalance in racemic mixtures of QDs between the left and right handed nanoparticles, which appears as a result of the formation of various defects or incorporation of impurities into crystallographic structure during their synthesis. We demonstrate that optical activity of colloidal solution of CdSe QDs with achiral ligands weakly depends on the QDs size and number of ZnS monolayers, but does not depend on the nature of achiral ligands or polarity of the solution.
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82
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Milton FP, Govan J, Mukhina MV, Gun'ko YK. The chiral nano-world: chiroptically active quantum nanostructures. NANOSCALE HORIZONS 2016; 1:14-26. [PMID: 32260598 DOI: 10.1039/c5nh00072f] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Chirality is one of the key factors in molecular recognition, therefore the development of new chiral nanoparticles is of great interest to many fields of scientific endeavour including chemistry, biochemistry, pharmacology and medicine. Knowledge of the fundamental concepts relevant to chirality in nanosystems is also very important for further advancement of nanoscience and nanotechnology in general. Over the past years, the use of stereospecific chiral stabilising molecules has opened a new avenue to the area of nanocrystal research. In this review article we present some recent advances in the development of various chiroptically active quantum nanostructures and discuss the latest progress in various approaches for the preparation of these nanostructures. We also consider the intrinsic chirality in quantum nanostructures due to the presence of chiral defects such as screw dislocations and discuss the structure-property relationship. Furthermore, the corresponding potential applications of these chiral nanomaterials has been analysed for key areas: sensing, cytotoxicity mediation and cell imaging, asymmetric catalysis and enantiomeric separation, circular polarised light emitting devices and spintronics. Finally, we provide an outlook for the future development of chiroptically active quantum nanostructures.
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Affiliation(s)
- Finn Purcell Milton
- School of Chemistry and CRANN, University of Dublin, Trinity College, Dublin 2, Ireland.
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83
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Liang Z, Bernardino K, Han J, Zhou Y, Sun K, de Moura AF, Kotov NA. Optical anisotropy and sign reversal in layer-by-layer assembled films from chiral nanoparticles. Faraday Discuss 2016; 191:141-157. [DOI: 10.1039/c6fd00064a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral anisotropy and related optical effects at the nanoscale represent some of the most dynamic areas of nanomaterials today. Translation of optical activity of chiral semiconductor and metallic nanoparticles (NPs) into optoelectronic devices requires preparation of thin films from chiral NPs on both flat and curved surfaces. In this paper we demonstrate that chiral NP films can be made via layer-by-layer assembly (LBL) using negatively charged chiral CdS NPs, stabilized by d- and l-cysteine and positively charged polyelectrolytes, as building blocks. LBL coatings from NPs combine simplicity of preparation and strong optical activity. Circular extinction measurements using circular dichroism instruments indicate that the film possess four chiroptical bands at 280, 320, 350, and 390 nm. The latter two bands at 390 and 350 nm are associated with the band gap transitions (chiral excitons), while the former two are attributed to transitions involving surface ligands. When NPs are assembled in LBL films, the rotatory activity and the sign for circular extinction associated with the electronic transition in the inorganic core of the NPs is conserved. However, this is not true for circular extinction bands at short wavelengths: the sign of the rotatory optical activity is reversed. This effect is attributed to the change of the conformation of surface ligands in the polyelectrolyte matrix, which was confirmed both by semi-empirical and density functional (DFT) quantum mechanical calculations. Circular dichroism spectra calculated using a DFT algorithm closely match the experimental spectra of CdS NPs. These findings indicate that the spectroscopic methods sensitive to chirality of the surface ligands can be used to investigate fine structural changes in the surface layer of nanocolloids. Strong rotatory optical activity of nanostructured semiconductor films opens the possibilities for new polarization-based optical devices.
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Affiliation(s)
- Zhumei Liang
- Department of Chemical Engineering
- University of Michigan
- Ann Arbor
- USA
- Biointerfaces Institute
| | - Kalil Bernardino
- Department of Chemistry
- Federal University of São Carlos
- São Carlos
- Brazil
| | - Jishu Han
- Department of Chemical Engineering
- University of Michigan
- Ann Arbor
- USA
- Biointerfaces Institute
| | - Yunlong Zhou
- Department of Chemical Engineering
- University of Michigan
- Ann Arbor
- USA
- Biointerfaces Institute
| | - Kai Sun
- Department of Materials Science and Engineering
- University of Michigan
- Ann Arbor
- USA
| | - André F. de Moura
- Department of Chemistry
- Federal University of São Carlos
- São Carlos
- Brazil
| | - Nicholas A. Kotov
- Department of Chemical Engineering
- University of Michigan
- Ann Arbor
- USA
- Biointerfaces Institute
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84
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Baimuratov AS, Rukhlenko ID, Noskov RE, Ginzburg P, Gun’ko YK, Baranov AV, Fedorov AV. Giant Optical Activity of Quantum Dots, Rods, and Disks with Screw Dislocations. Sci Rep 2015; 5:14712. [PMID: 26424498 PMCID: PMC4589690 DOI: 10.1038/srep14712] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 08/28/2015] [Indexed: 01/20/2023] Open
Abstract
For centuries mankind has been modifying the optical properties of materials: first, by elaborating the geometry and composition of structures made of materials found in nature, later by structuring the existing materials at a scale smaller than the operating wavelength. Here we suggest an original approach to introduce optical activity in nanostructured materials, by theoretically demonstrating that conventional achiral semiconducting nanocrystals become optically active in the presence of screw dislocations, which can naturally develop during the nanocrystal growth. We show the new properties to emerge due to the dislocation-induced distortion of the crystal lattice and the associated alteration of the nanocrystal's electronic subsystem, which essentially modifies its interaction with external optical fields. The g-factors of intraband transitions in our nanocrystals are found comparable with dissymmetry factors of chiral plasmonic complexes, and exceeding the typical g-factors of chiral molecules by a factor of 1000. Optically active semiconducting nanocrystals-with chiral properties controllable by the nanocrystal dimensions, morphology, composition and blending ratio-will greatly benefit chemistry, biology and medicine by advancing enantiomeric recognition, sensing and resolution of chiral molecules.
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Affiliation(s)
- Anvar S. Baimuratov
- ITMO University, 197101 Saint Petersburg, Russia
- Monash University, Clayton Campus, Victoria 3800, Australia
| | - Ivan D. Rukhlenko
- ITMO University, 197101 Saint Petersburg, Russia
- Monash University, Clayton Campus, Victoria 3800, Australia
| | - Roman E. Noskov
- Max Planck Institute for the Science of Light, Günther-Scharowsky-Straße 1, Bau 24, 91058 Erlangen, Germany
| | - Pavel Ginzburg
- Electrical Engineering Department, Tel Aviv University, Ramat Aviv 69978, Israel
| | - Yurii K. Gun’ko
- ITMO University, 197101 Saint Petersburg, Russia
- School of Chemistry and CRANN Institute, Trinity College, Dublin, Dublin 2, Ireland
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85
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Ngamdee K, Puangmali T, Tuntulani T, Ngeontae W. Circular dichroism sensor based on cadmium sulfide quantum dots for chiral identification and detection of penicillamine. Anal Chim Acta 2015; 898:93-100. [PMID: 26526914 DOI: 10.1016/j.aca.2015.09.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 08/10/2015] [Accepted: 09/21/2015] [Indexed: 01/27/2023]
Abstract
A new chemical sensor based on the measuring of circular dichroism signal (CD) was fabricated from cysteamine capped cadmium sulfide quantum dots (Cys-CdS QDs). The chiral-thiol molecules, d-penicillamine (DPA) and l-penicillamine (LPA), were used to evaluate potentials of this sensor. Basically, DPA and LPA provide very low CD signals. However, the CD signals of DPA and LPA can be enhanced in the presence of Cys-CdS QDs. The CD spectra of DPA and LPA exhibited a mirror image profile. Parameters affecting the determination of DPA and LPA were thoroughly investigated in details. Under the optimized condition, the CD signals of DPA and LPA displayed a linear relationship with the concentrations of both enantiomers, ranging from 1 to 35 μM. Detection limits of this sensor were 0.49 and 0.74 μM for DPA and LPA, respectively. To demonstrate a potential application of this sensor, the proposed sensor was used to determine DPA and LPA in real urine samples. It was confirmed that the proposed detection technique was reliable and could be utilized in a broad range of applications.
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Affiliation(s)
- Kessarin Ngamdee
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Theerapong Puangmali
- Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Thawatchai Tuntulani
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Wittaya Ngeontae
- Materials Chemistry Research Center, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
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86
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Mukhina MV, Maslov VG, Korsakov IV, Purcell Milton F, Loudon A, Baranov AV, Fedorov AV, Gun’ko YK. Optically active II-VI semiconductor nanocrystals via chiral phase transfer. ACTA ACUST UNITED AC 2015. [DOI: 10.1557/opl.2015.652] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe report optically active ensembles of II-VI semiconductor nanocrystals prepared via chiral phase transfer, which is initiated by exchange of the original achiral ligands capping the nanocrystals surfaces for chiral L- and D-cysteine. We used this method to obtain ensembles of CdSe, CdS, ZnS:Mn, and CdSe/ZnS quantum dots and CdSe/CdS quantum rods exhibited Circular Dichroism (CD) and Circularly Polarized Luminescence (CPL) signals. The optically active nanocrystals revealed the CD and CPL bands strongly correlated with absorption and luminescence bands with unique band “pattern” for each material and the nanocrystal shape.
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87
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Mukhina MV, Maslov VG, Baranov AV, Fedorov AV, Orlova AO, Purcell-Milton F, Govan J, Gun'ko YK. Intrinsic Chirality of CdSe/ZnS Quantum Dots and Quantum Rods. NANO LETTERS 2015; 15:2844-2851. [PMID: 25908405 DOI: 10.1021/nl504439w] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A new class of chiral nanoparticles is of great interest not only for nanotechnology, but also for many other fields of scientific endeavor. Normally the chirality in semiconductor nanocrystals is induced by the initial presence of chiral ligands/stabilizer molecules. Here we report intrinsic chirality of ZnS coated CdSe quantum dots (QDs) and quantum rods (QRs) stabilized by achiral ligands. As-prepared ensembles of these nanocrystals have been found to be a racemic mixture of d- and l-nanocrystals which also includes a portion of nonchiral nanocrystals and so in total the solution does not show a circular dichroism (CD) signal. We have developed a new enantioselective phase transfer technique to separate chiral nanocrystals using an appropriate chiral ligand and obtain optically active ensembles of CdSe/ZnS QDs and QRs. After enantioselective phase transfer, the nanocrystals isolated in organic phase, still capped with achiral ligands, now display circular dichroism (CD). We propose that the intrinsic chirality of CdSe/ZnS nanocrystals is caused by the presence of naturally occurring chiral defects.
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Affiliation(s)
| | | | | | | | | | - Finn Purcell-Milton
- ‡School of Chemistry and CRANN, University of Dublin, Trinity College, Dublin 2, Ireland
| | - Joseph Govan
- ‡School of Chemistry and CRANN, University of Dublin, Trinity College, Dublin 2, Ireland
| | - Yurii K Gun'ko
- †ITMO University, St. Petersburg, 197101, Russia
- ‡School of Chemistry and CRANN, University of Dublin, Trinity College, Dublin 2, Ireland
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88
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Baimuratov AS, Rukhlenko ID, Gun'ko YK, Baranov AV, Fedorov AV. Dislocation-induced chirality of semiconductor nanocrystals. NANO LETTERS 2015; 15:1710-1715. [PMID: 25651415 DOI: 10.1021/nl504369x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Optical activity is a common natural phenomenon, which occurs in individual molecules, biomolecules, biological species, crystalline solids, liquid crystals, and various nanosized objects, leading to numerous important applications in almost every field of modern science and technology. Because this activity can hardly be altered, creation of artificial active media with controllable optical properties is of paramount importance. Here, for the first time to the best of our knowledge, we theoretically demonstrate that optical activity can be inherent to many semiconductor nanowires, as it is induced by chiral dislocations naturally developing during their growth. By assembling such nanowires in two- or three-dimensional periodic lattices, one can create optically active quantum supercrystals whose activity can be varied in many ways owing to the size quantization of the nanowires' energy spectra. We believe that this research is of particular importance for the future development of semiconducting nanomaterials and their applications in nanotechnology, chemistry, biology, and medicine.
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89
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Moloney MP, Govan J, Loudon A, Mukhina M, Gun'ko YK. Preparation of chiral quantum dots. Nat Protoc 2015; 10:558-73. [DOI: 10.1038/nprot.2015.028] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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90
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Tedsana W, Tuntulani T, Ngeontae W. A circular dichroism sensor for Ni2+ and Co2+ based on l-cysteine capped cadmium sulfide quantum dots. Anal Chim Acta 2015; 867:1-8. [DOI: 10.1016/j.aca.2014.12.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 11/28/2014] [Accepted: 12/02/2014] [Indexed: 02/02/2023]
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91
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Rodrigues SP, Cui Y, Lan S, Kang L, Cai W. Metamaterials enable chiral-selective enhancement of two-photon luminescence from quantum emitters. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:1124-1130. [PMID: 25533019 DOI: 10.1002/adma.201405072] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 12/03/2014] [Indexed: 06/04/2023]
Abstract
The amplification of chirally modified, non-linear signals from quantum emitters is demonstrated by manipulating the geometric chirality of resonant plasmonic nanostructures. The chiral center of the metamaterial is opened and emitters occupy this light-confining and chirally sensitive region. Non-linear emission signals are enhanced by 40× that of the emitters not embedded in the metamaterial and display a 3× contrast for the opposite circular polarization.
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Affiliation(s)
- Sean P Rodrigues
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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92
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Tohgha U, Deol KK, Porter AG, Bartko SG, Choi JK, Leonard BM, Varga K, Kubelka J, Muller G, Balaz M. Ligand induced circular dichroism and circularly polarized luminescence in CdSe quantum dots. ACS NANO 2013; 7:11094-102. [PMID: 24200288 PMCID: PMC3927652 DOI: 10.1021/nn404832f] [Citation(s) in RCA: 175] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Chiral thiol capping ligands L- and D-cysteines induced modular chiroptical properties in achiral cadmium selenide quantum dots (CdSe QDs). Cys-CdSe prepared from achiral oleic acid capped CdSe by postsynthetic ligand exchange displayed size-dependent electronic circular dichroism (CD) and circularly polarized luminescence (CPL). Opposite CPL signals were measured for the CdSe QDs capped with D- and L-cysteine. The CD profile and CD anisotropy varied with size of CdSe nanocrystals with largest anisotropy observed for CdSe nanoparticles of 4.4 nm. Magic angle spinning solid state NMR (MAS ssNMR) experiments suggested bidentate interaction between cysteine and the surface of CdSe. Time Dependent Density Functional Theory (TDDFT) calculations verified that attachment of L- and D-cysteine to the surface of model (CdSe)13 nanoclusters induces measurable opposite CD signals for the exitonic band of the nanocluster. The origin of the induced chirality is consistent with the hybridization of highest occupied CdSe molecular orbitals with those of the chiral ligand.
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Affiliation(s)
- Urice Tohgha
- University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA
| | - Kirandeep K. Deol
- Department of Chemistry, San José State University, San José, CA 95192-0101, USA
| | - Ashlin G. Porter
- University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA
| | - Samuel G. Bartko
- University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA
| | - Jung Kyu Choi
- University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA
| | - Brian M. Leonard
- University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA
| | - Krisztina Varga
- University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA
| | - Jan Kubelka
- University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA
| | - Gilles Muller
- Department of Chemistry, San José State University, San José, CA 95192-0101, USA
- Gilles Muller, Department of Chemistry, San José State University, San José, CA 95192-0101, USA. Fax: +1 408 924-4945; Tel: +1 408 924-5000;
| | - Milan Balaz
- University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA
- Corresponding Authors Milan Balaz, University of Wyoming, Department of Chemistry, 1000 E. University Ave, Laramie, USA. Fax: +1 307 766-2807; Tel: +1 307 766-4330;
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93
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Yeom B, Zhang H, Zhang H, Park JI, Kim K, Govorov AO, Kotov NA. Chiral plasmonic nanostructures on achiral nanopillars. NANO LETTERS 2013; 13:5277-83. [PMID: 24111695 DOI: 10.1021/nl402782d] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Chirality of plasmonic films can be strongly enhanced by three-dimensional (3D) out-of-plane geometries. The complexity of lithographic methods currently used to produce such structures and other methods utilizing chiral templates impose limitations on spectral windows of chiroptical effects, the size of substrates, and hence, further research on chiral plasmonics. Here we demonstrate 3D chiral plasmonic nanostructures (CPNs) with high optical activity in the visible spectral range based on initially achiral nanopillars from ZnO. We made asymmetric gold nanoshells on the nanopillars by vacuum evaporation at different inclination and rotation angles to achieve controlled symmetry breaking and obtained both left- and right-rotating isomers. The attribution of chiral optical effects to monolithic enantiomers made in this process was confirmed by theoretical calculations based on their geometry established from scanning electron microscope (SEM) images. The chirality of the nanoshells is retained upon the release from the substrate into a stable dispersion. Deviation of the incident angle of light from normal results in increase of polarization rotation and chiral g-factor as high as -0.3. This general approach for preparation of abiological nanoscale chiral materials can be extended to other out-of plane 3D nanostructures. The large area films made on achiral nanopillars are convenient for sensors, optical devices, and catalysis.
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Affiliation(s)
- Bongjun Yeom
- Departments of Chemical Engineering, University of Michigan , Ann Arbor, Michigan 48109, United States
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94
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Abstract
Chirality in nanoscience may offer new opportunities for applications beyond the traditional fields of chirality, such as the asymmetric catalysts in the molecular world and the chiral propellers in the macroscopic world. In the last two decades, there has been an amazing array of chiral nanostructures reported in the literature. This review aims to explore and categorize the common mechanisms underlying these systems. We start by analyzing the origin of chirality in simple systems such as the helical spring and hair vortex. Then, the chiral nanostructures in the literature were categorized according to their material composition and underlying mechanism. Special attention is paid to highlight systems with original discoveries, exceptional structural characteristics, or unique mechanisms.
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Affiliation(s)
- Yong Wang
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
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95
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Lu F, Tian Y, Liu M, Su D, Zhang H, Govorov AO, Gang O. Discrete nanocubes as plasmonic reporters of molecular chirality. NANO LETTERS 2013; 13:3145-3151. [PMID: 23777419 DOI: 10.1021/nl401107g] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
One of the most intriguing structural properties, chirality, is often exhibited by organic and bio-organic molecular constructs. Chiral spectral signatures, typically appearing in the UV range for organic materials and known as circular dichroism (CD), are widely used to probe a molecular stereometry. Such probing has an increasingly broad importance for biomedical and pharmacological fields due to synthesis/separation/detection of homochiral species, biological role of chiral organization, and structural response to environmental conditions and enantiomeric drugs. Recent theoretical and experimental works demonstrated that the CD signal from chiral organic molecules could appear in the plasmonic (typically, visible) band when they coupled with plasmonic particles. However, the magnitude of this CD signal, induced by discrete nonchiral plasmonic particles, and its native molecular analog were found to be comparable. Here we show that shaped nonchiral nanoparticles, namely, gold/silver core/shell nanocubes, can act as plasmonic reporters of chirality for attached molecules by providing a giant, 2 orders of magnitude CD enhancement in a near-visible region. Through the experimental and theoretical comparison with nanoparticles of other shapes and materials, we demonstrate a uniqueness of silver nanocube geometry for the CD enhancement. The discovered phenomenon opens novel opportunities in ultrasensitive probing of chiral molecules and for novel optical nanomaterials based on the chiral elements.
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Affiliation(s)
- Fang Lu
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
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96
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Delgado-Pérez T, Bouchet LM, de la Guardia M, Galian RE, Pérez-Prieto J. Sensing Chiral Drugs by Using CdSe/ZnS Nanoparticles Capped withN-Acetyl-L-Cysteine Methyl Ester. Chemistry 2013; 19:11068-76. [DOI: 10.1002/chem.201300875] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 05/08/2013] [Indexed: 11/06/2022]
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97
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Brunet E, Jiménez L, de Victoria-Rodriguez M, Luu V, Muller G, Juanes O, Rodríguez-Ubis JC. The use of lanthanide luminescence as a reporter in the solid state: Desymmetrization of the prochiral layers of γ-zirconium phosphate/phosphonate and circularly polarized luminescence. MICROPOROUS AND MESOPOROUS MATERIALS : THE OFFICIAL JOURNAL OF THE INTERNATIONAL ZEOLITE ASSOCIATION 2013; 169:222-234. [PMID: 23329880 PMCID: PMC3544490 DOI: 10.1016/j.micromeso.2012.11.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Solid-state CPL measurements were performed for the first time on hybrid, laminar materials based on γ-ZrP pillared with organic diphosphonates. Ad hoc optically pure diphosphonates were synthesized and the luminescence properties of their complexation with Tb(III) were verified in solution. CD and CPL measurements showed that the bistriazolylpyridine chromophores bonded to the metal provided an effective chiral environment that produced significant signals. In the case of the γ-ZrP-derived materials, experimental evidence and simple molecular modeling hinted to the occurrence of supramolecular chirality in the particles, induced by the intrinsic dissymmetry of the organic diphosphonates or by the intercalation of chiral species such as 1-phenethylamine. Chirality at the supramolecular level was revealed in the solid state by the CPL signals measured from reporter Tb(III) ions intercalated in the hybrid matrix.
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Affiliation(s)
- Ernesto Brunet
- Departamento de Química Orgánica, Facultad de Ciencias C-1, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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98
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Mohammad-Rezaei R, Razmi H, Abdolmohammad-Zadeh H. d-penicillamine capped cadmium telluride quantum dots as a novel fluorometric sensor of copper(II). LUMINESCENCE 2013; 28:503-9. [DOI: 10.1002/bio.2484] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Revised: 12/16/2012] [Accepted: 12/24/2012] [Indexed: 12/12/2022]
Affiliation(s)
- Rahim Mohammad-Rezaei
- Analytical Chemistry Research Lab., Faculty of Sciences; Azarbaijan Shahid Madani University; Tabriz; Iran
| | - Habib Razmi
- Analytical Chemistry Research Lab., Faculty of Sciences; Azarbaijan Shahid Madani University; Tabriz; Iran
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99
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Ben-Moshe A, Maoz BM, Govorov AO, Markovich G. Chirality and chiroptical effects in inorganic nanocrystal systems with plasmon and exciton resonances. Chem Soc Rev 2013; 42:7028-41. [DOI: 10.1039/c3cs60139k] [Citation(s) in RCA: 275] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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100
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Tohgha U, Varga K, Balaz M. Achiral CdSe quantum dots exhibit optical activity in the visible region upon post-synthetic ligand exchange with d- or l-cysteine. Chem Commun (Camb) 2013; 49:1844-6. [DOI: 10.1039/c3cc37987f] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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