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Jayamaha H, Ugras TJ, Page KA, Hanrath T, Robinson RD, Shepherd LM. Chiroptical Strain Sensors from Electrospun Cadmium Sulfide Quantum-Dot Fibers. ACS APPLIED MATERIALS & INTERFACES 2024; 16:17757-17765. [PMID: 38535523 PMCID: PMC11009915 DOI: 10.1021/acsami.3c17623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/27/2024] [Accepted: 03/08/2024] [Indexed: 04/12/2024]
Abstract
Controllable synthesis of homochiral nano/micromaterials has been a constant challenge for fabricating various stimuli-responsive chiral sensors. To provide an avenue to this goal, we report electrospinning as a simple and economical strategy to form continuous homochiral microfibers with strain-sensitive chiroptical properties. First, electrospun homochiral microfibers from self-assembled cadmium sulfide (CdS) quantum dot magic-sized clusters (MSCs) are produced. Highly sensitive and reversible strain sensors are then fabricated by embedding these chiroptically active fibers into elastomeric films. The chiroptical response on stretching is indicated quantitatively as reversible changes in magnitude, spectral position (wavelength), and sign in circular dichroism (CD) and linear dichroism (LD) signals and qualitatively as a prominent change in the birefringence features under cross-polarizers. The observed periodic twisted helical fibrils at the surface of fibers provide insights into the origin of the fibers' chirality. The measurable shifts in CD and LD are caused by elastic deformations of these helical fibrillar structures of the fiber. To elucidate the origin of these chiroptical properties, we used field emission-electron microscopy (FE-SEM), atomic force microscopy (AFM), synchrotron X-ray analysis, polarized optical microscopy, as well as measurements to isolate the true CD, and contributions from photoelastic modulators (PEM) and LD. Our findings thus offer a promising strategy to fabricate chiroptical strain-sensing devices with multiple measurables/observables using electric-field-assisted spinning of homochiral nano/microfibers.
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Affiliation(s)
- Hansadi Jayamaha
- Department
of Human Centered Design, Cornell University, Ithaca, New York 14853, United States
| | - Thomas J. Ugras
- School
of Applied and Engineering Physics, Cornell
University, Ithaca, New York 14853, United States
| | - Kirt A. Page
- Materials
and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
- UES,
Inc., Beavercreek, Ohio 45432, United States
- Cornell
High Energy Synchrotron Source, Cornell
University, Ithaca, New York 14853, United States
| | - Tobias Hanrath
- Robert F.
Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Richard D. Robinson
- Department
of Materials Science and Engineering, Cornell
University, Ithaca, New York 14853, United States
| | - Larissa M. Shepherd
- Department
of Human Centered Design, Cornell University, Ithaca, New York 14853, United States
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Qiao T, Bordoloi P, Miyashita T, Dionne JA, Tang ML. Tuning the Chiral Growth of Plasmonic Bipyramids via the Wavelength and Polarization of Light. NANO LETTERS 2024; 24:2611-2618. [PMID: 38357869 DOI: 10.1021/acs.nanolett.3c04862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Circularly polarized light (CPL) is a versatile tool to prepare chiral nanostructures, but the mechanism for inducing enantioselectivity is not well understood. This work shows that the energy and polarization of visible photons can initiate photodeposition at different sites on plasmonic nanocrystals. Here, CPL on achiral gold bipyramids (AuBPs) creates hot holes that oxidatively deposit PbO2 asymmetrically. We show for the first time that the location of PbO2 photodeposition and hence optical dissymmetry depends on the CPL wavelength. Specifically, 488 and 532 nm CPL induce PbO2 growth in the middle of AuBPs, whereas 660 nm CPL induces PbO2 growth at the tips. Our observations show that wavelength-dependent plasmonic field distributions are more important than surface lightning rod effects in localizing plasmon-mediated photochemistry. The largest optical dissymmetry occurs at excitation wavelengths between the transverse and longitudinal resonances of the AuBPs because higher-order modes are required to induce chiral electric fields.
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Affiliation(s)
- Tian Qiao
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
| | - Priyanuj Bordoloi
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Tsumugi Miyashita
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jennifer A Dionne
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Ming Lee Tang
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, United States
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
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Wang F, Wang X, Lu X, Huang C. Nanophotonic Enhanced Chiral Sensing and Its Biomedical Applications. BIOSENSORS 2024; 14:39. [PMID: 38248416 PMCID: PMC11154488 DOI: 10.3390/bios14010039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/03/2024] [Accepted: 01/10/2024] [Indexed: 01/23/2024]
Abstract
Chiral sensing is crucial in the fields of biology and the pharmaceutical industry. Many naturally occurring biomolecules, i.e., amino acids, sugars, and nucleotides, are inherently chiral. Their enantiomers are strongly associated with the pharmacological effects of chiral drugs. Owing to the extremely weak chiral light-matter interactions, chiral sensing at an optical frequency is challenging, especially when trace amounts of molecules are involved. The nanophotonic platform allows for a stronger interaction between the chiral molecules and light to enhance chiral sensing. Here, we review the recent progress in nanophotonic-enhanced chiral sensing, with a focus on the superchiral near-field and enhanced circular dichroism (CD) spectroscopy generated in both the dielectric and in plasmonic structures. In addition, the recent applications of chiral sensing in biomedical fields are discussed, including the detection and treatment of difficult diseases, i.e., Alzheimer's disease, diabetes, and cancer.
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Affiliation(s)
- Fei Wang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China;
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xue Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
| | - Xinchao Lu
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China;
| | - Chengjun Huang
- Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China;
- University of Chinese Academy of Sciences, Beijing 100049, China
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Liu M, Yu L, Li Y, Ma Y, An S, Zheng J, Liu L, Lin K, Gao P. Bionic Plasmonic Nanoarrays Excited by Radially Polarized Vector Beam for Metal-Enhanced Fluorescence. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1237. [PMID: 37049330 PMCID: PMC10097346 DOI: 10.3390/nano13071237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/18/2023] [Accepted: 03/30/2023] [Indexed: 06/19/2023]
Abstract
Metal-enhanced fluorescence (MEF) is an important fluorescence technology due to its ability to significantly improve the fluorescence intensity. Here, we present a new MEF configuration of the bionic nanorod array illuminated by radially polarized vector beam (RVB). The bionic nanorod array is fabricated via a nanoimprinting method by using the wings of the Chinese cicada "meimuna mongolica" as bio-templates, and later coating gold film by ion sputtering deposition method. The MEF performance of the prepared substrate is tested by a home-made optical system. The experiment results show that, in the case of RVB excitation, the intensity of fluorescence is more than 10 times stronger with the nano-imprinted substrate than that with glass. Using the bionic nanoarray as a substrate, the intensity of fluorescence is ~2 times stronger via RVB than that by the linearly polarized beam. In addition, the prepared substrate is verified to have good uniformity.
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Affiliation(s)
- Min Liu
- School of Physics, Xidian University, Xi’an 710071, China
- Guangzhou Institute of Technology, Xidian University, Guangzhou 510555, China
| | - Lan Yu
- School of Physics, Xidian University, Xi’an 710071, China
| | - Yanru Li
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
| | - Ying Ma
- School of Physics, Xidian University, Xi’an 710071, China
| | - Sha An
- School of Physics, Xidian University, Xi’an 710071, China
| | - Juanjuan Zheng
- School of Physics, Xidian University, Xi’an 710071, China
| | - Lixin Liu
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
| | - Ke Lin
- School of Physics, Xidian University, Xi’an 710071, China
| | - Peng Gao
- School of Physics, Xidian University, Xi’an 710071, China
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