1
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Fan Y, Li J, Jiang M, Zhao J, He L, Wang Y, Shao F. Self-assembly of DNA G-quadruplex nanowires: a study of the mechanism towards micrometer length. NANOSCALE 2024; 16:17964-17973. [PMID: 39235476 DOI: 10.1039/d4nr02696a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/06/2024]
Abstract
The G-quadruplex (GQ) formed by guanine-rich DNA strands exhibits superior thermal stability and electric properties, which have generated substantial interest in applying GQ DNA to bioelectric interfaces. However, single G-wires formed by GQs have not yet surpassed the μm length due to the lack of an optimal assembly protocol and understanding of assembly mechanisms that limit application. Herein, we optimized a self-assembly protocol for a short 4-nt oligonucleotide (dG4) to achieve micrometer lengths of G-wires, including the buffer composition, incubation process and surface assembly. Furthermore, both theoretical modeling and chemical modifications were applied to unveil the atomic-level detail of GQ monomer interfaces and indicated that the assembly process follows a stepwise mechanism from nucleation to grow into oligomers and nanowires.
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Affiliation(s)
- Yiqi Fan
- National Key Laboratory of Biobased Transportation Fuel Technology, Zhejiang University-University of Illinois, Urbana-Champaign Institute, Zhejiang University, Haining, 314400, P.R. China
- Department of Chemistry, Zhejiang University, Hangzhou, 310000, P.R. China
| | - Jiachen Li
- College of Life Sciences, Zhejiang University, Hangzhou, 310000, P.R. China
| | - Min Jiang
- National Key Laboratory of Biobased Transportation Fuel Technology, Zhejiang University-University of Illinois, Urbana-Champaign Institute, Zhejiang University, Haining, 314400, P.R. China
| | - Jing Zhao
- National Key Laboratory of Biobased Transportation Fuel Technology, Zhejiang University-University of Illinois, Urbana-Champaign Institute, Zhejiang University, Haining, 314400, P.R. China
- Department of Chemistry, Zhejiang University, Hangzhou, 310000, P.R. China
| | - Lei He
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P.R. China
| | - Yong Wang
- College of Life Sciences, Zhejiang University, Hangzhou, 310000, P.R. China
| | - Fangwei Shao
- National Key Laboratory of Biobased Transportation Fuel Technology, Zhejiang University-University of Illinois, Urbana-Champaign Institute, Zhejiang University, Haining, 314400, P.R. China
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2
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Chang H, Zhang J. Detecting nanoparticles by "listening". FRONTIERS OF PHYSICS 2023; 18:53602. [PMID: 37192844 PMCID: PMC10163296 DOI: 10.1007/s11467-023-1287-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 03/24/2023] [Indexed: 05/18/2023]
Abstract
In the macroscopic world, we can obtain some important information through the vibration of objects, that is, listening to the sound. Likewise, we can also get some information of the nanoparticles that we want to know by the means of "listening" in the microscopic world. In this review, we will introduce two sensing methods (cavity optomechanical sensing and surface-enhanced Raman scattering sensing) which can be used to detect the nanoparticles. The cavity optomechanical systems are mainly used to detect sub-gigahertz nanoparticle or cavity vibrations, while surface-enhanced Raman scattering is a well-known technique to detect molecular vibrations whose frequency generally exceeds terahertz. Therefore, the vibrational information of nanoparticles from low-frequency to high-frequency could be obtained by these two methods. The size of the viruses is at the nanoscale and we can regard it as a kind of nanoparticles. Rapid and ultrasensitive detection of the viruses is the key strategies to break the spread of the viruses in the community. Cavity optomechanical sensing enables rapid, ultrasensitive detection of nanoparticles through the interaction of light and mechanical oscillators and surface-enhanced Raman scattering is an attractive qualitatively analytical technique for chemical sensing and biomedical applications, which has been used to detect the SARS-CoV-2 infected. Hence, investigation in these two fields is of vital importance in preventing the spread of the virus from affecting human's life and health.
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Affiliation(s)
- Haonan Chang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083 China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Jun Zhang
- State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083 China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 China
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3
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Silver-Based Surface Plasmon Sensors: Fabrication and Applications. Int J Mol Sci 2023; 24:ijms24044142. [PMID: 36835553 PMCID: PMC9963732 DOI: 10.3390/ijms24044142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 02/13/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
A series of novel phenomena such as optical nonlinear enhancement effect, transmission enhancement, orientation effect, high sensitivity to refractive index, negative refraction and dynamic regulation of low threshold can be generated by the control of surface plasmon (SP) with metal micro-nano structure and metal/material composite structure. The application of SP in nano-photonics, super-resolution imaging, energy, sensor detection, life science, and other fields shows an important prospect. Silver nanoparticles are one of the commonly used metal materials for SP because of their high sensitivity to refractive index change, convenient synthesis, and high controllable degree of shape and size. In this review, the basic concept, fabrication, and applications of silver-based surface plasmon sensors are summarized.
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4
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Karawdeniya BI, Damry AM, Murugappan K, Manjunath S, Bandara YMNDY, Jackson CJ, Tricoli A, Neshev D. Surface Functionalization and Texturing of Optical Metasurfaces for Sensing Applications. Chem Rev 2022; 122:14990-15030. [PMID: 35536016 DOI: 10.1021/acs.chemrev.1c00990] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Optical metasurfaces are planar metamaterials that can mediate highly precise light-matter interactions. Because of their unique optical properties, both plasmonic and dielectric metasurfaces have found common use in sensing applications, enabling label-free, nondestructive, and miniaturized sensors with ultralow limits of detection. However, because bare metasurfaces inherently lack target specificity, their applications have driven the development of surface modification techniques that provide selectivity. Both chemical functionalization and physical texturing methodologies can modify and enhance metasurface properties by selectively capturing analytes at the surface and altering the transduction of light-matter interactions into optical signals. This review summarizes recent advances in material-specific surface functionalization and texturing as applied to representative optical metasurfaces. We also present an overview of the underlying chemistry driving functionalization and texturing processes, including detailed directions for their broad implementation. Overall, this review provides a concise and centralized guide for the modification of metasurfaces with a focus toward sensing applications.
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Affiliation(s)
- Buddini I Karawdeniya
- ARC Centre of Excellence for Transformative Meta Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Adam M Damry
- Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT 2601, Australia
| | - Krishnan Murugappan
- Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT 2601, Australia
| | - Shridhar Manjunath
- ARC Centre of Excellence for Transformative Meta Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Y M Nuwan D Y Bandara
- ARC Centre of Excellence for Transformative Meta Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
| | - Colin J Jackson
- Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT 2601, Australia
| | - Antonio Tricoli
- Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT 2601, Australia
- School of Biomedical Engineering, Faculty of Engineering, The University of Sydney, Camperdown, NSW 2006, Australia
| | - Dragomir Neshev
- ARC Centre of Excellence for Transformative Meta Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia
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5
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Wang P, Krasavin AV, Liu L, Jiang Y, Li Z, Guo X, Tong L, Zayats AV. Molecular Plasmonics with Metamaterials. Chem Rev 2022; 122:15031-15081. [PMID: 36194441 PMCID: PMC9562285 DOI: 10.1021/acs.chemrev.2c00333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Indexed: 11/30/2022]
Abstract
Molecular plasmonics, the area which deals with the interactions between surface plasmons and molecules, has received enormous interest in fundamental research and found numerous technological applications. Plasmonic metamaterials, which offer rich opportunities to control the light intensity, field polarization, and local density of electromagnetic states on subwavelength scales, provide a versatile platform to enhance and tune light-molecule interactions. A variety of applications, including spontaneous emission enhancement, optical modulation, optical sensing, and photoactuated nanochemistry, have been reported by exploiting molecular interactions with plasmonic metamaterials. In this paper, we provide a comprehensive overview of the developments of molecular plasmonics with metamaterials. After a brief introduction to the optical properties of plasmonic metamaterials and relevant fabrication approaches, we discuss light-molecule interactions in plasmonic metamaterials in both weak and strong coupling regimes. We then highlight the exploitation of molecules in metamaterials for applications ranging from emission control and optical modulation to optical sensing. The role of hot carriers generated in metamaterials for nanochemistry is also discussed. Perspectives on the future development of molecular plasmonics with metamaterials conclude the review. The use of molecules in combination with designer metamaterials provides a rich playground both to actively control metamaterials using molecular interactions and, in turn, to use metamaterials to control molecular processes.
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Affiliation(s)
- Pan Wang
- State Key
Laboratory of Modern Optical Instrumentation, College of Optical Science
and Engineering, Zhejiang University, Hangzhou310027, China
- Department
of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, U.K.
- Jiaxing
Key Laboratory of Photonic Sensing & Intelligent Imaging, Jiaxing314000, China
- Intelligent
Optics & Photonics Research Center, Jiaxing Research Institute, Zhejiang University, Jiaxing314000, China
| | - Alexey V. Krasavin
- Department
of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, U.K.
| | - Lufang Liu
- State Key
Laboratory of Modern Optical Instrumentation, College of Optical Science
and Engineering, Zhejiang University, Hangzhou310027, China
| | - Yunlu Jiang
- Department
of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, U.K.
| | - Zhiyong Li
- Jiaxing
Key Laboratory of Photonic Sensing & Intelligent Imaging, Jiaxing314000, China
- Intelligent
Optics & Photonics Research Center, Jiaxing Research Institute, Zhejiang University, Jiaxing314000, China
| | - Xin Guo
- State Key
Laboratory of Modern Optical Instrumentation, College of Optical Science
and Engineering, Zhejiang University, Hangzhou310027, China
- Jiaxing
Key Laboratory of Photonic Sensing & Intelligent Imaging, Jiaxing314000, China
- Intelligent
Optics & Photonics Research Center, Jiaxing Research Institute, Zhejiang University, Jiaxing314000, China
| | - Limin Tong
- State Key
Laboratory of Modern Optical Instrumentation, College of Optical Science
and Engineering, Zhejiang University, Hangzhou310027, China
| | - Anatoly V. Zayats
- Department
of Physics and London Centre for Nanotechnology, King’s College London, Strand, LondonWC2R 2LS, U.K.
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6
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Yang Y, Xu B, Murray J, Haverstick J, Chen X, Tripp RA, Zhao Y. Rapid and quantitative detection of respiratory viruses using surface-enhanced Raman spectroscopy and machine learning. Biosens Bioelectron 2022; 217:114721. [PMID: 36152394 DOI: 10.1016/j.bios.2022.114721] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/29/2022] [Accepted: 09/11/2022] [Indexed: 12/23/2022]
Abstract
Rapid and sensitive pathogen detection is important for prevention and control of disease. Here, we report a label-free diagnostic platform that combines surface-enhanced Raman scattering (SERS) and machine learning for the rapid and accurate detection of thirteen respiratory virus species including SARS-CoV-2, common human coronaviruses, influenza viruses, and others. Virus detection and measurement have been performed using highly sensitive SiO2 coated silver nanorod array substrates, allowing for detection and identification of their characteristic SERS peaks. Using appropriate spectral processing procedures and machine learning algorithms (MLAs) including support vector machine (SVM), k-nearest neighbor, and random forest, the virus species as well as strains and variants have been differentiated and classified and a differentiation accuracy of >99% has been obtained. Utilizing SVM-based regression, quantitative calibration curves have been constructed to accurately estimate the unknown virus concentrations in buffer and saliva. This study shows that using a combination of SERS, MLA, and regression, it is possible to classify and quantify the virus in saliva, which could aid medical diagnosis and therapeutic intervention.
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Affiliation(s)
- Yanjun Yang
- School of Electrical and Computer Engineering, College of Engineering, The University of Georgia, Athens, GA, 30602, USA.
| | - Beibei Xu
- Department of Statistics, The University of Georgia, Athens, GA, 30602, USA
| | - Jackelyn Murray
- Department of Infectious Diseases, College of Veterinary Medicine, The University of Georgia, Athens, GA, 30602, USA
| | - James Haverstick
- Department of Physics and Astronomy, The University of Georgia, Athens, GA, 30602, USA
| | - Xianyan Chen
- Department of Statistics, The University of Georgia, Athens, GA, 30602, USA
| | - Ralph A Tripp
- Department of Infectious Diseases, College of Veterinary Medicine, The University of Georgia, Athens, GA, 30602, USA
| | - Yiping Zhao
- Department of Physics and Astronomy, The University of Georgia, Athens, GA, 30602, USA.
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7
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Su X, Dong Z, Wu J, Chi D, Loh XJ. Celebrating 25 Years of IMRE: Research Highlights on Nanomaterials and Nanotechnologies. ACS NANO 2022; 16:11492-11497. [PMID: 35904455 DOI: 10.1021/acsnano.2c06830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The Institute of Materials Research and Engineering (IMRE) is a research institute of the Science and Engineering Research Council (SERC), Agency for Science, Technology and Research (A*STAR). IMRE was established in September 1997. Over the past 25 years, IMRE has developed core competencies and interdisciplinary teams for material development from fundamental discoveries to industrial translation. Currently, with over 400 researchers and state-of-the-art research facilities, IMRE conducts world class research in important material and material technology fields, including polymer composites, optical materials, electronic materials, soft materials, structural materials, energy materials, biomaterials, quantum technologies, as well as advanced characterization. As a material-centered research institute in Singapore, IMRE has played important roles in pushing science boundaries and developing cutting-edge technologies. One of the key strategies is to partner international organizations, research institutes, and industry to fulfill its vision to be a leading research institute to accelerate materials research, moving from "Made in Singapore" toward "Created in Singapore".
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Affiliation(s)
- Xiaodi Su
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634
- Department of Chemistry, National University of Singapore, 9 Engineering Drive 1, Singapore 117543
| | - Zhaogang Dong
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576
| | - Jing Wu
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634
| | - Dongzhi Chi
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634
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8
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Shi CF, Xia XH. In Situ Monitoring of DNA-Hg 2+ Binding Reaction within Confined Nanospace of Metamaterial Nanochannel by Plasmon-Enhanced Raman Scattering. J Phys Chem Lett 2022; 13:1330-1336. [PMID: 35107289 DOI: 10.1021/acs.jpclett.2c00019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nanochannel-based plasmon-enhanced Raman scattering (PERS) substrates can simulate biological environments, revealing the recognition and conformation information on biomolecules in confined spaces. In this work, a metamaterial nanochannel-based PERS platform was constructed for highly sensitive analysis of DNA recognition to Hg2+ with the lowest Hg2+ concentration down to 1.0 pM. The established platform enables in situ monitoring of the thermodynamics and kinetics of DNA-Hg2+ recognition reaction in a confined nanospace. The recognition reaction in a nanospace shows good reversibility and specificity, and the isotherm follows well the Freundlich adsorption model. Compared to its folding on a rough Au nanofilm, the folding time of ssDNA-Rox decorated in nanochannels is remarkably increased, and the folding process can be tuned through varying the pore size and ionic strength. The presented PERS platform is promising for studying biomolecule-ion binding events and biomolecule conformation change under nanochannel-confined conditions.
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Affiliation(s)
- Cai-Feng Shi
- State Key lab of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 210023 Nanjing, China
| | - Xing-Hua Xia
- State Key lab of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, 210023 Nanjing, China
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9
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Pyun SB, Kim MG, Kim SW, Song JE, Jeon HI, Kim S, Park SJ, Cho EC. Optically Left-Handed Nanopearl Beads with Inductance-Capacitance Circuits at Visible-Near-Infrared Frequencies Based on Scalable Methods. ACS APPLIED MATERIALS & INTERFACES 2022; 14:7121-7129. [PMID: 35099922 DOI: 10.1021/acsami.1c20838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Optically left-handed materials refract the propagating light in the opposite direction. Most research has focused on the design of various structures, including split-ring resonators, either on planes or in particle cluster forms to resonate with specific light frequencies. However, for particle-based materials, the circuital structures for optical left-handedness have not been fully understood and the effect of interior structure on the optical handedness have not been investigated. Additionally, scalable methods to deploy the unique characteristics of the materials have not been reported so far and are still urgent. Here, optically left-handed nanopearl beads are synthesized in up to 1.25 L solutions. Nanopearl beads contain assembled Au nanocolloids, a dielectric sphere, and a thin silica layer that fixes the assembled structures to sustainably yield unique inductance-capacitance circuits at specific visible-near-infrared frequencies. The frequencies are tunable by modulating the interior structures. Investigation of the circuit structures and Poynting vectors generated within the nanopearl beads suggest the likelihood of their left-handedness. Moreover, the effects of interior structures on the optical handedness of the nanopearl beads are extensively investigated. The results could help commercialize optically left-handed materials and pioneer fields that have not been realized so far.
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Affiliation(s)
- Seung Beom Pyun
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Min Gyu Kim
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Sung Wook Kim
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Ji Eun Song
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Hyun Ik Jeon
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Sangho Kim
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
| | - So-Jung Park
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Eun Chul Cho
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
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10
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Palermo G, Rippa M, Conti Y, Vestri A, Castagna R, Fusco G, Suffredini E, Zhou J, Zyss J, De Luca A, Petti L. Plasmonic Metasurfaces Based on Pyramidal Nanoholes for High-Efficiency SERS Biosensing. ACS APPLIED MATERIALS & INTERFACES 2021; 13:43715-43725. [PMID: 34469103 PMCID: PMC8447193 DOI: 10.1021/acsami.1c12525] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
An inverted pyramidal metasurface was designed, fabricated, and studied at the nanoscale level for the development of a label-free pathogen detection on a chip platform that merges nanotechnology and surface-enhanced Raman scattering (SERS). Based on the integration and synergy of these ingredients, a virus immunoassay was proposed as a relevant proof of concept for very sensitive detection of hepatitis A virus, for the first time to our best knowledge, in a very small volume (2 μL), without complex signal amplification, allowing to detect a minimal virus concentration of 13 pg/mL. The proposed work aims to develop a high-flux and high-accuracy surface-enhanced Raman spectroscopy (SERS) nanobiosensor for the detection of pathogens to provide an effective method for early and easy water monitoring, which can be fast and convenient.
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Affiliation(s)
- Giovanna Palermo
- Department
of Physics, University of Calabria, Via
P. Bucci, 87036 Rende, CS, Italy
- CNR
NANOTEC—Istituto di Nanotecnologia, UOS Cosenza, 87036 Rende, CS, Italy
| | - Massimo Rippa
- Institute
of Applied Sciences and Intelligent Systems ”E. Caianiello”
CNR, 80078 Pozzuoli, Italy
| | - Ylli Conti
- Department
of Physics, University of Calabria, Via
P. Bucci, 87036 Rende, CS, Italy
| | - Ambra Vestri
- Institute
of Applied Sciences and Intelligent Systems ”E. Caianiello”
CNR, 80078 Pozzuoli, Italy
| | - Riccardo Castagna
- Institute
of Applied Sciences and Intelligent Systems ”E. Caianiello”
CNR, 80078 Pozzuoli, Italy
| | - Giovanna Fusco
- Department
of Food Safety, Nutrition and Veterinary
Public Health, Istituto Superiore di Sanitá, 00161 Rome, Italy
| | - Elisabetta Suffredini
- Department
of Food Safety, Nutrition and Veterinary
Public Health, Istituto Superiore di Sanitá, 00161 Rome, Italy
| | - Jun Zhou
- Institute
of Photonics, Faculty of Science, Ningbo University, 315211 Ningbo, People’s Republic of China
| | - Joseph Zyss
- LUMIN Laboratory
(CNRS), Institut d’Alembert, Universitè Paris Saclay, 91190 Gif sur Yvette, France
| | - Antonio De Luca
- Department
of Physics, University of Calabria, Via
P. Bucci, 87036 Rende, CS, Italy
- CNR
NANOTEC—Istituto di Nanotecnologia, UOS Cosenza, 87036 Rende, CS, Italy
| | - Lucia Petti
- Institute
of Applied Sciences and Intelligent Systems ”E. Caianiello”
CNR, 80078 Pozzuoli, Italy
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11
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All-Metal Terahertz Metamaterial Absorber and Refractive Index Sensing Performance. PHOTONICS 2021. [DOI: 10.3390/photonics8050164] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This paper presents a terahertz (THz) metamaterial absorber made of stainless steel. We found that the absorption rate of electromagnetic waves reached 99.95% at 1.563 THz. Later, we analyzed the effect of structural parameter changes on absorption. Finally, we explored the application of the absorber in refractive index sensing. We numerically demonstrated that when the refractive index (n) is changing from 1 to 1.05, our absorber can yield a sensitivity of 74.18 μm/refractive index unit (RIU), and the quality factor (Q-factor) of this sensor is 36.35. Compared with metal–dielectric–metal sandwiched structure, the absorber designed in this paper is made of stainless steel materials with no sandwiched structure, which greatly simplifies the manufacturing process and reduces costs.
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12
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Abstract
The extraordinary sensitivity of plasmonic sensors is well-known in the optics and photonics community. These sensors exploit simultaneously the enhancement and the localization of electromagnetic fields close to the interface between a metal and a dielectric. This enables, for example, the design of integrated biochemical sensors at scales far below the diffraction limit. Despite their practical realization and successful commercialization, the sensitivity and associated precision of plasmonic sensors are starting to reach their fundamental classical limit given by quantum fluctuations of light-known as the shot-noise limit. To improve the sensing performance of these sensors beyond the classical limit, quantum resources are increasingly being employed. This area of research has become known as "quantum plasmonic sensing", and it has experienced substantial activity in recent years for applications in chemical and biological sensing. This review aims to cover both plasmonic and quantum techniques for sensing, and it shows how they have been merged to enhance the performance of plasmonic sensors beyond traditional methods. We discuss the general framework developed for quantum plasmonic sensing in recent years, covering the basic theory behind the advancements made, and describe the important works that made these advancements. We also describe several key works in detail, highlighting their motivation, the working principles behind them, and their future impact. The intention of the review is to set a foundation for a burgeoning field of research that is currently being explored out of intellectual curiosity and for a wide range of practical applications in biochemistry, medicine, and pharmaceutical research.
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Affiliation(s)
- Changhyoup Lee
- Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.,Quantum Universe Center, Korea Institute for Advanced Study, Seoul 02455, Republic of Korea
| | - Benjamin Lawrie
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Raphael Pooser
- Quantum Information Science Group, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Kwang-Geol Lee
- Department of Physics, Hanyang University, Seoul 04763, Republic of Korea
| | - Carsten Rockstuhl
- Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021Karlsruhe, Germany.,Max Planck School of Photonics, 07745 Jena, Germany
| | - Mark Tame
- Department of Physics, Stellenbosch University, Stellenbosch 7602, South Africa
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13
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Qian J, Zhu Z, Yuan J, Liu Y, Liu B, Zhao X, Jiang L. Selectively enhanced Raman/fluorescence spectra in photonic-plasmonic hybrid structures. NANOSCALE ADVANCES 2020; 2:4682-4688. [PMID: 36132894 PMCID: PMC9418944 DOI: 10.1039/d0na00625d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 09/12/2020] [Indexed: 06/16/2023]
Abstract
The manipulation of the interaction between molecules and photonic-plasmonic hybrid structures is critical for the application of surface-enhanced spectroscopy (SES). Herein, we report a study on the mode coupling mechanism and SES performance in a typical optoplasmonic system constructed with a polystyrene microsphere (PS MS) resonator and gold nanoparticles (Au NPs). The mode coupling mechanism was found to be closely dependent on the relative positions of PS MS, Au NPs, and molecules in the optoplasmonic system, based on which selectively enhanced Raman and fluorescence signals of molecules can be realized via the collaboration of enhancement and quenching channels of the PS MS and Au NPs. We demonstrate two arrangements of the photonic-plasmonic hybrid structure, which can support fluorescence signals with sharp whispering-gallery modes and apparently enhanced Raman signals with relatively low detection limits and good robustness, respectively.
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Affiliation(s)
- Jisong Qian
- Institute of Micro-nano Photonic & Beam Steering, School of Science, Nanjing University of Science and Technology Nanjing 210094 China
| | - Zebin Zhu
- Institute of Micro-nano Photonic & Beam Steering, School of Science, Nanjing University of Science and Technology Nanjing 210094 China
| | - Jing Yuan
- Institute of Micro-nano Photonic & Beam Steering, School of Science, Nanjing University of Science and Technology Nanjing 210094 China
| | - Ying Liu
- Institute of Micro-nano Photonic & Beam Steering, School of Science, Nanjing University of Science and Technology Nanjing 210094 China
| | - Bing Liu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University Nanjing 210009 China
| | - Xiangwei Zhao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University Nanjing 210009 China
| | - Liyong Jiang
- Institute of Micro-nano Photonic & Beam Steering, School of Science, Nanjing University of Science and Technology Nanjing 210094 China
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Dai Z, Hu G, Ou Q, Zhang L, Xia F, Garcia-Vidal FJ, Qiu CW, Bao Q. Artificial Metaphotonics Born Naturally in Two Dimensions. Chem Rev 2020; 120:6197-6246. [DOI: 10.1021/acs.chemrev.9b00592] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Zhigao Dai
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, P.R. China
- Department of Materials Science and Engineering, ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Guangwei Hu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
| | - Qingdong Ou
- Department of Materials Science and Engineering, ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Lei Zhang
- Key Laboratory for Physical Electronics and Devices of the Ministry of Education and Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, P.R. China
| | - Fengnian Xia
- Department of Electrical Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Francisco J. Garcia-Vidal
- Departamento de Fisica Teorica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, Madrid 28049, Spain
- Donostia International Physics Center (DIPC), Donostia−San Sebastian E-20018, Spain
| | - Cheng-Wei Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
| | - Qiaoliang Bao
- Department of Materials Science and Engineering, ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET), Monash University, Wellington Road, Clayton, Victoria 3800, Australia
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15
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Yan X, Zhang Z, Liang L, Yang M, Wei D, Song X, Zhang H, Lu Y, Liu L, Zhang M, Wang T, Yao J. A multiple mode integrated biosensor based on higher order Fano metamaterials. NANOSCALE 2020; 12:1719-1727. [PMID: 31894802 DOI: 10.1039/c9nr07777d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A multiple mode integrated biosensor based on higher order Fano metamaterials (FRMMs) is proposed. The frequency shifts (Δf) of x-polarized quadrupolar (Qx), octupolar (Ox), hexadecapolar (Hx), y-polarized quadrupolar (Qy) and octupolar (Oy) Fano resonance modes are integrated to detect the concentration of lung cancer cells. In experiments, the concentrations of lung cancer cells can be distinguished by the shape and distribution of integrated graphics. In addition, an anomalous response in Δf in resonant mode is surprisingly observed. As the cell concentration increases, the Δf at the Qx-dip, Qy-dip and Oy-dip successively experiences an increasing frequency shift stage (IFSS), decreasing frequency shift stage (DFSS) and re-increasing frequency shift stage (RIFSS). The extraordinary DFSS confirmed by single-factor analysis of variance (ANOVA) means an unusual physical phenomenon in metamaterial biosensors. By introducing a new dielectric constant εf, we amend perturbation theory to explain the unusual phenomenon in Δf. With the change of the mode order from Qx to Hx, the εf increases from -2.78 to 0.75, which implies that the negative εf leads to the appearance of the DFSS. As a platform for biosensing, this study opens a new window from the perspective of multiple mode integration.
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Affiliation(s)
- Xin Yan
- School of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang, China.
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16
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Liu R, Ye X, Cui T. Recent Progress of Biomarker Detection Sensors. RESEARCH (WASHINGTON, D.C.) 2020; 2020:7949037. [PMID: 33123683 PMCID: PMC7585038 DOI: 10.34133/2020/7949037] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 09/13/2020] [Indexed: 12/11/2022]
Abstract
Early cancer diagnosis and treatment are crucial research fields of human health. One method that has proven efficient is biomarker detection which can provide real-time and accurate biological information for early diagnosis. This review presents several biomarker sensors based on electrochemistry, surface plasmon resonance (SPR), nanowires, other nanostructures, and, most recently, metamaterials which have also shown their mechanisms and prospects in application in recent years. Compared with previous reviews, electrochemistry-based biomarker sensors have been classified into three strategies according to their optimizing methods in this review. This makes it more convenient for researchers to find a specific fabrication method to improve the performance of their sensors. Besides that, as microfabrication technologies have improved and novel materials are explored, some novel biomarker sensors-such as nanowire-based and metamaterial-based biomarker sensors-have also been investigated and summarized in this review, which can exhibit ultrahigh resolution, sensitivity, and limit of detection (LoD) in a more complex detection environment. The purpose of this review is to understand the present by reviewing the past. Researchers can break through bottlenecks of existing biomarker sensors by reviewing previous works and finally meet the various complex detection needs for the early diagnosis of human cancer.
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Affiliation(s)
- Ruitao Liu
- State Key Lab Precise Measurement Technology & Instrument, Department of Precision Instruments, Tsinghua University, Beijing, China
| | - Xiongying Ye
- State Key Lab Precise Measurement Technology & Instrument, Department of Precision Instruments, Tsinghua University, Beijing, China
| | - Tianhong Cui
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota, USA
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17
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Zhao J, Liu P, Ma J, Li D, Yang H, Chen W, Jiang Y. Enhancement of Radiosensitization by Silver Nanoparticles Functionalized with Polyethylene Glycol and Aptamer As1411 for Glioma Irradiation Therapy. Int J Nanomedicine 2019; 14:9483-9496. [PMID: 31819445 PMCID: PMC6897066 DOI: 10.2147/ijn.s224160] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 11/25/2019] [Indexed: 01/04/2023] Open
Abstract
Background The efficacy of radiotherapy for glioma is often limited by the radioresistance of glioma cells. The radiosensitizing effects of silver nanoparticles (AgNPs) on glioma were found in the previous studies of our group. In order to enhance the radiosensitivity of tumor cells and selectively kill them while reducing the side effects of irradiation therapy, targeted modification of AgNPs is urgently needed. Materials and methods In the present study, AgNPs functionalized with polyethylene glycol (PEG) and aptamer As1411 (AsNPs) were synthesized and subsequently characterized by transmission electron microscopy, ultraviolet-visible spectroscopy and Fourier transform infrared spectroscopy. Then the targeting property of AsNPs was evaluated by dark-field imaging, confocal microscopy and in vivo imaging. Both colony formation assay and glioma-bearing mouse model were employed to study the radiosensitizing effect of AsNPs. Results The characterization results revealed a spherical shape of AgNPs with an average diameter of 18 nm and the successful construction of AsNPs. AsNPs were confirmed to specifically target C6 glioma cells, but not normal human microvascular endothelial cells. Moreover, AsNPs could not only internalize into tumor cells, but also penetrate into the core of tumor spheroids. In vitro experiments showed that AsNPs exhibited a better radiosensitizing effect than AgNPs and PEGylated AgNPs (PNPs), inducing a higher rate of apoptotic cell death. In vivo imaging demonstrated that Cy5-AsNPs preferentially accumulated at the tumor site, and the ratio of fluorescence intensity of Cy5-AsNPs to that of Cy5-PNPs reached the maximum at 6 h post-systemic administration. Furthermore, the combination of AsNPs with irradiation significantly prolonged the median survival time of C6 glioma-bearing mice. Conclusion Our results indicated that AsNPs could be an effective nano-radiosensitizer for glioma targeting treatment.
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Affiliation(s)
- Jing Zhao
- School of Medicine, Southeast University, Nanjing 210009, People's Republic of China
| | - Peidang Liu
- School of Medicine, Southeast University, Nanjing 210009, People's Republic of China.,Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, People's Republic of China
| | - Jun Ma
- Radiotherapy Department, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing 210029, People's Republic of China
| | - Dongdong Li
- School of Medicine, Southeast University, Nanjing 210009, People's Republic of China
| | - Huiquan Yang
- School of Medicine, Southeast University, Nanjing 210009, People's Republic of China
| | - Wenbin Chen
- School of Medicine, Southeast University, Nanjing 210009, People's Republic of China
| | - Yaowen Jiang
- Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, People's Republic of China
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18
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Li Y, Lv J, Gu Q, Hu S, Li Z, Jiang X, Ying Y, Si G. Metadevices with Potential Practical Applications. Molecules 2019; 24:E2651. [PMID: 31336634 PMCID: PMC6680820 DOI: 10.3390/molecules24142651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/10/2019] [Accepted: 07/16/2019] [Indexed: 11/16/2022] Open
Abstract
Metamaterials are "new materials" with different superior physical properties, which have generated great interest and become popular in scientific research. Various designs and functional devices using metamaterials have formed a new academic world. The application concept of metamaterial is based on designing diverse physical structures that can break through the limitations of traditional optical materials and composites to achieve extraordinary material functions. Therefore, metadevices have been widely studied by the academic community recently. Using the properties of metamaterials, many functional metadevices have been well investigated and further optimized. In this article, different metamaterial structures with varying functions are reviewed, and their working mechanisms and applications are summarized, which are near-field energy transfer devices, metamaterial mirrors, metamaterial biosensors, and quantum-cascade detectors. The development of metamaterials indicates that new materials will become an important breakthrough point and building blocks for new research domains, and therefore they will trigger more practical and wide applications in the future.
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Affiliation(s)
- Yafei Li
- College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
| | - Jiangtao Lv
- College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
| | - Qiongchan Gu
- College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
| | - Sheng Hu
- College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
| | - Zhigang Li
- College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
| | - Xiaoxiao Jiang
- College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
| | - Yu Ying
- College of Information & Control Engineering, Shenyang Jianzhu University, Shenyang 110168, China.
| | - Guangyuan Si
- Melbourne Centre for Nanofabrication, Clayton, Victoria 3168, Australia.
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19
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Shakoor A, Grant J, Grande M, Cumming DRS. Towards Portable Nanophotonic Sensors. SENSORS (BASEL, SWITZERLAND) 2019; 19:E1715. [PMID: 30974832 PMCID: PMC6479635 DOI: 10.3390/s19071715] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/05/2019] [Accepted: 04/07/2019] [Indexed: 01/02/2023]
Abstract
A range of nanophotonic sensors composed of different materials and device configurations have been developed over the past two decades. These sensors have achieved high performance in terms of sensitivity and detection limit. The size of onchip nanophotonic sensors is also small and they are regarded as a strong candidate to provide the next generation sensors for a range of applications including chemical and biosensing for point-of-care diagnostics. However, the apparatus used to perform measurements of nanophotonic sensor chips is bulky, expensive and requires experts to operate them. Thus, although integrated nanophotonic sensors have shown high performance and are compact themselves their practical applications are limited by the lack of a compact readout system required for their measurements. To achieve the aim of using nanophotonic sensors in daily life it is important to develop nanophotonic sensors which are not only themselves small, but their readout system is also portable, compact and easy to operate. Recognizing the need to develop compact readout systems for onchip nanophotonic sensors, different groups around the globe have started to put efforts in this direction. This review article discusses different works carried out to develop integrated nanophotonic sensors with compact readout systems, which are divided into two categories; onchip nanophotonic sensors with monolithically integrated readout and onchip nanophotonic sensors with separate but compact readout systems.
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Affiliation(s)
- Abdul Shakoor
- Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK.
| | - James Grant
- School of Engineering, University of Glasgow, Glasgow G12 8LT, UK.
| | - Marco Grande
- Dipartimento di Ingegneria Elettrica e dell'Informazione, Politecnico di Bari, 70125 Bari, Italy.
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20
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Mejía-Salazar JR, Camacho SA, Constantino CJL, Oliveira ON. New trends in plasmonic (bio)sensing. AN ACAD BRAS CIENC 2018; 90:779-801. [PMID: 29742207 DOI: 10.1590/0001-3765201820170571] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/04/2017] [Indexed: 11/22/2022] Open
Abstract
The strong enhancement and localization of electromagnetic field in plasmonic systems have found applications in many areas, which include sensing and biosensing. In this paper, an overview will be provided of the use of plasmonic phenomena in sensors and biosensors with emphasis on two main topics. The first is related to possible ways to enhance the performance of sensors and biosensors based on surface plasmon resonance (SPR), where examples are given of functionalized magnetic nanoparticles, magnetoplasmonic effects and use of metamaterials for SPR sensing. The other topic is focused on surface-enhanced Raman scattering (SERS) for sensing, for which uniform, flexible, and reproducible SERS substrates have been produced. With such recent developments, there is the prospect of improving sensitivity and lowering the limit of detection in order to overcome the limitations inherent in ultrasensitive detection of chemical and biological analytes, especially at single molecule levels.
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21
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Jackman JA, Rahim Ferhan A, Cho NJ. Nanoplasmonic sensors for biointerfacial science. Chem Soc Rev 2018; 46:3615-3660. [PMID: 28383083 DOI: 10.1039/c6cs00494f] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In recent years, nanoplasmonic sensors have become widely used for the label-free detection of biomolecules across medical, biotechnology, and environmental science applications. To date, many nanoplasmonic sensing strategies have been developed with outstanding measurement capabilities, enabling detection down to the single-molecule level. One of the most promising directions has been surface-based nanoplasmonic sensors, and the potential of such technologies is still emerging. Going beyond detection, surface-based nanoplasmonic sensors open the door to enhanced, quantitative measurement capabilities across the biointerfacial sciences by taking advantage of high surface sensitivity that pairs well with the size of medically important biomacromolecules and biological particulates such as viruses and exosomes. The goal of this review is to introduce the latest advances in nanoplasmonic sensors for the biointerfacial sciences, including ongoing development of nanoparticle and nanohole arrays for exploring different classes of biomacromolecules interacting at solid-liquid interfaces. The measurement principles for nanoplasmonic sensors based on utilizing the localized surface plasmon resonance (LSPR) and extraordinary optical transmission (EOT) phenomena are first introduced. The following sections are then categorized around different themes within the biointerfacial sciences, specifically protein binding and conformational changes, lipid membrane fabrication, membrane-protein interactions, exosome and virus detection and analysis, and probing nucleic acid conformations and binding interactions. Across these themes, we discuss the growing trend to utilize nanoplasmonic sensors for advanced measurement capabilities, including positional sensing, biomacromolecular conformation analysis, and real-time kinetic monitoring of complex biological interactions. Altogether, these advances highlight the rich potential of nanoplasmonic sensors and the future growth prospects of the community as a whole. With ongoing development of commercial nanoplasmonic sensors and analytical models to interpret corresponding measurement data in the context of biologically relevant interactions, there is significant opportunity to utilize nanoplasmonic sensing strategies for not only fundamental biointerfacial science, but also translational science applications related to clinical medicine and pharmaceutical drug development among countless possibilities.
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Affiliation(s)
- Joshua A Jackman
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
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22
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Ahmadivand A, Gerislioglu B, Tomitaka A, Manickam P, Kaushik A, Bhansali S, Nair M, Pala N. Extreme sensitive metasensor for targeted biomarkers identification using colloidal nanoparticles-integrated plasmonic unit cells. BIOMEDICAL OPTICS EXPRESS 2018; 9:373-386. [PMID: 29552379 PMCID: PMC5854044 DOI: 10.1364/boe.9.000373] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 12/14/2017] [Accepted: 12/21/2017] [Indexed: 05/03/2023]
Abstract
Engineered terahertz (THz) plasmonic metamaterials have emerged as promising platforms for quick infection diagnosis, cost-effective and real-time pharmacology applications owing to their non-destructive and harmless interaction with biological tissues in both in vivo and in vitro assays. As a recent member of THz metamaterials family, toroidal metamaterials have been demonstrated to be supporting high-quality sharp resonance modes. Here we introduce a THz metasensor based on a plasmonic surface consisting of metamolecules that support ultra-narrow toroidal resonances excited by the incident radiation and demonstrate detection of an ultralow concertation targeted biomarker. The toroidal plasmonic metasurface was designed and optimized through extensive numerical studies and fabricated by standard microfabrication techniques. The surface then functionalized by immobilizing the antibody for virus-envelope proteins (ZIKV-EPs) for selective sensing. We sensed and quantified the ZIKV-EP in the assays by measuring the spectral shifts of the toroidal resonances while varying the concentration. In an improved protocol, we introduced gold nanoparticles (GNPs) decorated with the same antibodies onto the metamolecules and monitored the resonance shifts for the same concentrations. Our studies verified that the presence of GNPs enhances capturing of biomarker molecules in the surrounding medium of the metamaterial. By measuring the shift of the toroidal dipolar momentum (up to Δω~0.35 cm-1) for different concentrations of the biomarker proteins, we analyzed the sensitivity, repeatability, and limit of detection (LoD) of the proposed toroidal THz metasensor. The results show that up to 100-fold sensitivity enhancement can be obtained by utilizing plasmonic nanoparticles-integrated toroidal metamolecules in comparison to analogous devices. This approach allows for detection of low molecular-weight biomolecules (≈13 kDa) in diluted solutions using toroidal THz plasmonic unit cells.
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Affiliation(s)
- Arash Ahmadivand
- Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, FL 33174, USA
| | - Burak Gerislioglu
- Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, FL 33174, USA
| | - Asahi Tomitaka
- Center for Personalized NanoMedicine, Institute of Neurolmmune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
| | - Pandiaraj Manickam
- Bio-MEMS and Microsystems Laboratory, Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, FL 33174, USA
- Electrodics and Electrocatalysis Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630 006, Tamil Nadu, India
| | - Ajeet Kaushik
- Center for Personalized NanoMedicine, Institute of Neurolmmune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
| | - Shekhar Bhansali
- Bio-MEMS and Microsystems Laboratory, Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, FL 33174, USA
| | - Madhavan Nair
- Center for Personalized NanoMedicine, Institute of Neurolmmune Pharmacology, Department of Immunology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL 33199, USA
| | - Nezih Pala
- Department of Electrical and Computer Engineering, Florida International University, 10555 W Flagler St., Miami, FL 33174, USA
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Zhu Y, Li Z, Hao Z, DiMarco C, Maturavongsadit P, Hao Y, Lu M, Stein A, Wang Q, Hone J, Yu N, Lin Q. Optical conductivity-based ultrasensitive mid-infrared biosensing on a hybrid metasurface. LIGHT, SCIENCE & APPLICATIONS 2018; 7:67. [PMID: 30275947 PMCID: PMC6156330 DOI: 10.1038/s41377-018-0066-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 08/04/2018] [Accepted: 08/17/2018] [Indexed: 05/05/2023]
Abstract
Optical devices are highly attractive for biosensing as they can not only enable quantitative measurements of analytes but also provide information on molecular structures. Unfortunately, typical refractive index-based optical sensors do not have sufficient sensitivity to probe the binding of low-molecular-weight analytes. Non-optical devices such as field-effect transistors can be more sensitive but do not offer some of the significant features of optical devices, particularly molecular fingerprinting. We present optical conductivity-based mid-infrared (mid-IR) biosensors that allow for sensitive and quantitative measurements of low-molecular-weight analytes as well as the enhancement of spectral fingerprints. The sensors employ a hybrid metasurface consisting of monolayer graphene and metallic nano-antennas and combine individual advantages of plasmonic, electronic and spectroscopic approaches. First, the hybrid metasurface sensors can optically detect target molecule-induced carrier doping to graphene, allowing highly sensitive detection of low-molecular-weight analytes despite their small sizes. Second, the resonance shifts caused by changes in graphene optical conductivity is a well-defined function of graphene carrier density, thereby allowing for quantification of the binding of molecules. Third, the sensor performance is highly stable and consistent thanks to its insensitivity to graphene carrier mobility degradation. Finally, the sensors can also act as substrates for surface-enhanced infrared spectroscopy. We demonstrated the measurement of monolayers of sub-nanometer-sized molecules or particles and affinity binding-based quantitative detection of glucose down to 200 pM (36 pg/mL). We also demonstrated enhanced fingerprinting of minute quantities of glucose and polymer molecules.
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Affiliation(s)
- Yibo Zhu
- Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA
| | - Zhaoyi Li
- Department of Applied Physics and Applied Math, Columbia University, New York, NY 10027 USA
| | - Zhuang Hao
- Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA
| | - Christopher DiMarco
- Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA
| | - Panita Maturavongsadit
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208 USA
| | - Yufeng Hao
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093 China
| | - Ming Lu
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973 USA
| | - Aaron Stein
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973 USA
| | - Qian Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208 USA
| | - James Hone
- Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA
| | - Nanfang Yu
- Department of Applied Physics and Applied Math, Columbia University, New York, NY 10027 USA
| | - Qiao Lin
- Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA
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24
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Sugumaran S, Jamlos MF, Ahmad MN, Bellan CS, Schreurs D. Nanostructured materials with plasmonic nanobiosensors for early cancer detection: A past and future prospect. Biosens Bioelectron 2017; 100:361-373. [PMID: 28946108 DOI: 10.1016/j.bios.2017.08.044] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/02/2017] [Accepted: 08/21/2017] [Indexed: 02/08/2023]
Abstract
Early cancer detection and treatment is an emerging and fascinating field of plasmonic nanobiosensor research. It paves to enrich a life without affecting living cells leading to a possible survival of the patient. This review describes a past and future prospect of an integrated research field on nanostructured metamaterials, microwave transmission, surface plasmonic resonance, nanoantennas, and their manifested versatile properties with nano-biosensors towards early cancer detection to preserve human health. Interestingly, (i) microwave transmission shows more advantages than other electromagnetic radiation in reacting with biological tissues, (ii) nanostructured metamaterial (Au) with special properties like size and shape can stimulate plasmonic effects, (iii) plasmonic based nanobiosensors are to explore the efficacy for early cancer tumour detection or single molecular detection and (iv) nanoantenna wireless communication by using microwave inverse scattering nanomesh (MISN) technique instead of conventional techniques can be adopted to characterize the microwave scattered signals from the biomarkers. It reveals that the nanostructured material with plasmonic nanobiosensor paves a fascinating platform towards early detection of cancer tumour and is anticipated to be exploited as a magnificent field in the future.
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Affiliation(s)
- Sathish Sugumaran
- Advanced Communication Engineering Centre (ACE), School of Computer and Communication Engineering, Universiti Malaysia Perlis, Kangar 01000, Perlis, Malaysia.
| | - Mohd Faizal Jamlos
- Advanced Communication Engineering Centre (ACE), School of Computer and Communication Engineering, Universiti Malaysia Perlis, Kangar 01000, Perlis, Malaysia
| | - Mohd Noor Ahmad
- School of Materials Engineering, Universiti Malaysia Perlis, Kangar 02600, Perlis, Malaysia
| | - Chandar Shekar Bellan
- Nanotechnology Research Lab, Department of Physics, Kongunadu Arts and Science College, G-N Mills, Coimbatore 641 029, Tamil Nadu, India
| | - Dominique Schreurs
- Department of Electrical Engineering, division ESAT-TELEMIC, KU Leuven, Belgium
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25
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Metamaterials and Metasurfaces for Sensor Applications. SENSORS 2017; 17:s17081726. [PMID: 28749422 PMCID: PMC5579738 DOI: 10.3390/s17081726] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 07/21/2017] [Accepted: 07/23/2017] [Indexed: 01/19/2023]
Abstract
Electromagnetic metamaterials (MMs) and metasurfaces (MSs) are artificial media and surfaces with subwavelength separations of meta-atoms designed for anomalous manipulations of light properties. Owing to large scattering cross-sections of metallic/dielectric meta-atoms, it is possible to not only localize strong electromagnetic fields in deep subwavelength volume but also decompose and analyze incident light signal with ultracompact setup using MMs and MSs. Hence, by probing resonant spectral responses from extremely boosted interactions between analyte layer and optical MMs or MSs, sensing the variation of refractive index has been a popular and practical application in the field of photonics. Moreover, decomposing and analyzing incident light signal can be easily achieved with anisotropic MSs, which can scatter light to different directions according to its polarization or wavelength. In this paper, we present recent advances and potential applications of optical MMs and MSs for refractive index sensing and sensing light properties, which can be easily integrated with various electronic devices. The characteristics and performances of devices are summarized and compared qualitatively with suggestions of design guidelines.
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26
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Wang Z, Zong S, Wu L, Zhu D, Cui Y. SERS-Activated Platforms for Immunoassay: Probes, Encoding Methods, and Applications. Chem Rev 2017; 117:7910-7963. [DOI: 10.1021/acs.chemrev.7b00027] [Citation(s) in RCA: 368] [Impact Index Per Article: 52.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhuyuan Wang
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
| | - Shenfei Zong
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
| | - Lei Wu
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
| | - Dan Zhu
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
| | - Yiping Cui
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, China
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27
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Zhang Y, Guo S, Cheng S, Ji X, He Z. Label-free silicon nanodots featured ratiometric fluorescent aptasensor for lysosomal imaging and pH measurement. Biosens Bioelectron 2017; 94:478-484. [PMID: 28342376 DOI: 10.1016/j.bios.2017.03.041] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/14/2017] [Accepted: 03/19/2017] [Indexed: 12/25/2022]
Abstract
The homeostasis of lysosomal pH is crucial in cell physiology. Developing small fluorescent nanosensors for lysosome imaging and ratiometric measurement of pH is highly demanded yet challenging. Herein, a pH-sensitive fluorescein tagged aptamer AS1411 has been utilized to covalently modify the label-free fluorescent silicon nanodots via a crosslinker for construction of a ratiometric pH biosensor. The established aptasensor exhibits the advantages of ultrasmall size, hypotoxicity, excellent pH reversibility and good photostability, which favors its application in an intracellular environment. Using human breast MCF-7 cancer cells and MCF-10A normal cells as the model, this aptasensor shows cell specificity for cancer cells and displays a wide pH response range of 4.5-8.0 in living cells. The results demonstrate that the pH of MCF-7 cells is 5.1, which is the expected value for acidic organelles. Lysosome imaging and accurate measurement of pH in MCF-7 cells have been successfully conducted based on this nanosensor via fluorescent microscopy and flow cytometry.
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Affiliation(s)
- Yanan Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Shan Guo
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Shibo Cheng
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xinghu Ji
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Zhike He
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
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28
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Chen P, Tran NT, Wen X, Xiong Q, Liedberg B. Inflection Point of the Localized Surface Plasmon Resonance Peak: A General Method to Improve the Sensitivity. ACS Sens 2017; 2:235-242. [PMID: 28723144 DOI: 10.1021/acssensors.6b00633] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The shift of the localized surface plasmon resonance (LSPR) spectrum is widely used in bio- and chemical sensing. Traditionally, the shift is monitored at the peak maximum of the extinction spectrum. We demonstrate that the inflection point at the long wavelength side of the peak maximum shows better refractive index sensitivity than the peak maximum. A consistent improvement in bulk refractive index sensitivity of 18-55% is observed for six different nanoparticles such as spherical particles of different sizes, nanostar and nanorods with different aspect ratios. Local refractive index changes induced by molecular adsorption confirm the superior performance of the method. We contribute this improvement in sensitivity to the change in shape of the LSPR peak in response to an increase of the local refractive index. We further illustrate the advantage of using the inflection point method for analyzing DNA adsorption on U-shaped metamaterials, and for using 17 nm spherical gold nanoparticles for detection of matrix metalloprotease 7 (MMP-7), a biomarker that is heavily up-regulated during certain cancers. With the inflection point, the limit of detection (LOD) for MMP-7 is improved to 0.094 μg/mL from 0.22 μg/mL. This improvement may facilitate early diagnosis of salivary and colorectal cancers. We also envision that this generic method can be employed to track minute optical responses in other analytical areas.
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Affiliation(s)
- Peng Chen
- Centre
for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Nhung Thi Tran
- Centre
for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Xinglin Wen
- School
of Physical and Mathematical Sciences, Division of Physics and Applied
Physics, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Qihua Xiong
- School
of Physical and Mathematical Sciences, Division of Physics and Applied
Physics, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Bo Liedberg
- Centre
for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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29
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Sreekanth KV, Alapan Y, ElKabbash M, Ilker E, Hinczewski M, Gurkan UA, De Luca A, Strangi G. Extreme sensitivity biosensing platform based on hyperbolic metamaterials. NATURE MATERIALS 2016; 15:621-7. [PMID: 27019384 PMCID: PMC4959915 DOI: 10.1038/nmat4609] [Citation(s) in RCA: 265] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 02/25/2016] [Indexed: 05/20/2023]
Abstract
Optical sensor technology offers significant opportunities in the field of medical research and clinical diagnostics, particularly for the detection of small numbers of molecules in highly diluted solutions. Several methods have been developed for this purpose, including label-free plasmonic biosensors based on metamaterials. However, the detection of lower-molecular-weight (<500 Da) biomolecules in highly diluted solutions is still a challenging issue owing to their lower polarizability. In this context, we have developed a miniaturized plasmonic biosensor platform based on a hyperbolic metamaterial that can support highly confined bulk plasmon guided modes over a broad wavelength range from visible to near infrared. By exciting these modes using a grating-coupling technique, we achieved different extreme sensitivity modes with a maximum of 30,000 nm per refractive index unit (RIU) and a record figure of merit (FOM) of 590. We report the ability of the metamaterial platform to detect ultralow-molecular-weight (244 Da) biomolecules at picomolar concentrations using a standard affinity model streptavidin-biotin.
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Affiliation(s)
- Kandammathe Valiyaveedu Sreekanth
- Department of Physics, Case Western Reserve University, 10600 Euclid Avenue, Cleveland, Ohio 44106, USA
- Correspondence and requests for materials should be addressed to K.V.S. or G.S. ;
| | - Yunus Alapan
- Case Biomanufacturing and Microfabrication Laboratory, Mechanical and Aerospace Engineering Department, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Mohamed ElKabbash
- Department of Physics, Case Western Reserve University, 10600 Euclid Avenue, Cleveland, Ohio 44106, USA
| | - Efe Ilker
- Department of Physics, Case Western Reserve University, 10600 Euclid Avenue, Cleveland, Ohio 44106, USA
| | - Michael Hinczewski
- Department of Physics, Case Western Reserve University, 10600 Euclid Avenue, Cleveland, Ohio 44106, USA
| | - Umut A. Gurkan
- Case Biomanufacturing and Microfabrication Laboratory, Mechanical and Aerospace Engineering Department, Case Western Reserve University, Cleveland, Ohio 44106, USA
- Biomedical Engineering Department, Case Western Reserve University, Cleveland, Ohio 44106, USA
- Department of Orthopedics, Case Western Reserve University, Cleveland, Ohio 44106, USA
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio 44106, USA
| | - Antonio De Luca
- CNR-NANOTEC Istituto di Nanotecnologia and Department of Physics, University of Calabria, 87036-Rende, Italy
| | - Giuseppe Strangi
- Department of Physics, Case Western Reserve University, 10600 Euclid Avenue, Cleveland, Ohio 44106, USA
- CNR-NANOTEC Istituto di Nanotecnologia and Department of Physics, University of Calabria, 87036-Rende, Italy
- Correspondence and requests for materials should be addressed to K.V.S. or G.S. ;
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30
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Zhu S, Fan C, Mao Y, Wang J, He J, Liang E, Chao M. A monolayer of hierarchical silver hemi-mesoparticles with tunable surface topographies for highly sensitive surface-enhanced Raman spectroscopy. J Chem Phys 2016; 144:074703. [PMID: 26896995 DOI: 10.1063/1.4941699] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
We proposed a facile green synthesis system to synthesize large-scale Ag hemi-mesoparticles monolayer on Cu foil. Ag hemi-mesoparticles have different surface morphologies on their surfaces, including ridge-like, meatball-like, and fluffy-like shapes. In the reaction, silver nitrate was reduced by copper at room temperature in dimethyl sulfoxide via the galvanic displacement reaction. The different surface morphologies of the Ag hemi-mesoparticles were adjusted by changing the reaction time, and the hemi-mesoparticle surface formed fluffy-spherical nanoprotrusions at longer reaction time. At the same time, we explored the growth mechanism of silver hemi-mesoparticles with different surface morphologies. With 4-mercaptobenzoic acid as Raman probe molecules, the fluffy-like silver hemi-mesoparticles monolayer with the best activity of surface enhanced Raman scattering (SERS), the enhancement factor is up to 7.33 × 10(7) and the detection limit can reach 10(-10)M. SERS measurements demonstrate that these Ag hemi-mesoparticles can serve as sensitive SERS substrates. At the same time, using finite element method, the distribution of the localized electromagnetic field near the particle surface was simulated to verify the enhanced mechanism. This study helps us to understand the relationship between morphology Ag hemi-mesoparicles and the properties of SERS.
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Affiliation(s)
- Shuangmei Zhu
- School of Physical Science and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, China
| | - Chunzhen Fan
- School of Physical Science and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, China
| | - Yanchao Mao
- School of Physical Science and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, China
| | - Junqiao Wang
- School of Physical Science and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, China
| | - Jinna He
- School of Physical Science and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, China
| | - Erjun Liang
- School of Physical Science and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, China
| | - Mingju Chao
- School of Physical Science and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450052, China
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31
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Yue W, Wang Z, Whittaker J, Schedin F, Wu Z, Han J. Resonance control of mid-infrared metamaterials using arrays of split-ring resonator pairs. NANOTECHNOLOGY 2016; 27:055303. [PMID: 26751676 DOI: 10.1088/0957-4484/27/5/055303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present our design, fabrication and characterization of resonance-controllable metamaterials operating at mid-infrared wavelengths. The metamaterials are composed of pairs of back-to-back or face-to-face U-shape split-ring resonators (SRRs). Transmission spectra of the metamaterials are measured using Fourier-transform infrared spectroscopy. The results show that the transmission resonance is dependent on the distance between the two SRRs in each SRR pair. The dips in the transmission spectrum shift to shorter wavelengths with increasing distance between the two SRRs for both the back-to-back and face-to-face SRR pairs. The position of the resonance dips in the spectrum can hence be controlled by the relative position of the SRRs. This mechanism of resonance control offers a promising way of developing metamaterials with tunability for optical filters and bio/chemical sensing devices in integrated nano-optics.
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Affiliation(s)
- Weisheng Yue
- National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK
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32
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Gao S, Cao Y, Yan Y, Xiang X, Guo X. Correlations between fluorescence emission and base stacks of nucleic acid G-quadruplexes. RSC Adv 2016. [DOI: 10.1039/c6ra21347b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Correlations between parallel G-quadruplex structures and featured fluorescence emission bands have been built.
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Affiliation(s)
- Shang Gao
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Yanwei Cao
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Yuting Yan
- College of Chemistry
- Jilin University
- Changchun
- China
| | | | - Xinhua Guo
- College of Chemistry
- Jilin University
- Changchun
- China
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33
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Gold nanostars: Benzyldimethylammonium chloride-assisted synthesis, plasmon tuning, SERS and catalytic activity. J Colloid Interface Sci 2016; 462:341-50. [DOI: 10.1016/j.jcis.2015.10.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 10/02/2015] [Accepted: 10/05/2015] [Indexed: 11/23/2022]
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34
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Ai J, Li J, Ga L, Yun G, Xu L, Wang E. G-quadruplex/protoporphyrin IX-functionalized silver nanoconjugates for targeted cancer cell photodynamic therapy. RSC Adv 2016. [DOI: 10.1039/c6ra18178c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
A new type of G-quadruplex/protoporphyrin IX-functionalized silver nanoconjugate was prepared and used for the targeted photodynamic therapy of cancer cells via the specific interaction between AS1411 and the nucleolin on the cell surface.
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Affiliation(s)
- Jun Ai
- College of Chemistry and Enviromental Science
- Inner Mongolia Normal University
- Hohhot 010022
- China
- State Key Laboratory of Electroanalytical Chemistry
| | - Jing Li
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Lu Ga
- College of Pharmacy
- Inner Mongolia Medical University
- Hohhot 010110
- China
| | - Guohong Yun
- College of Chemistry and Enviromental Science
- Inner Mongolia Normal University
- Hohhot 010022
- China
| | - Li Xu
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Erkang Wang
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
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35
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Li YR, Liu Q, Hong Z, Wang HF. Magnetic Separation-Assistant Fluorescence Resonance Energy Transfer Inhibition for Highly Sensitive Probing of Nucleolin. Anal Chem 2015; 87:12183-9. [PMID: 26558409 DOI: 10.1021/acs.analchem.5b03064] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
For the widely used "off-on" fluorescence (or phosphorescence) resonance energy transfer (FRET or PRET) system, the separation of donors and acceptors species was vital for enhancing the sensitivity. To date, separation of free donors from FRET/PRET inhibition systems was somewhat not convenient, whereas separation of the target-induced far-between acceptors has hardly been reported yet. We presented here a novel magnetic separation-assistant fluorescence resonance energy transfer (MS-FRET) inhibition strategy for highly sensitive detection of nucleolin using Cy5.5-AS1411 as the donor and Fe3O4-polypyrrole core-shell (Fe3O4@PPY) nanoparticles as the NIR quenching acceptor. Due to hydrophobic interaction and π-π stacking of AS1411 and PPY, Cy5.5-AS1411 was bound onto the surface of Fe3O4@PPY, resulting in 90% of fluorescence quenching of Cy5.5-AS1411. Owing to the much stronger specific interaction of AS1411 and nucleolin, the presence of nucleolin could take Cy5.5-AS1411 apart from Fe3O4@PPY and restore the fluorescence of Cy5.5-AS1411. The superparamagnetism of Fe3O4@PPY enabled all separations and fluorescence measurements complete in the same quartz cell, and thus allowed the convenient but accurate comparison of the sensitivity and fluorescence recovery in the cases of separation or nonseparation. Compared to nonseparation FRET inhibition, the separation of free Cy5.5-AS1411 from Cy5.5-AS1411-Fe3O4@PPY solution (the first magnetic separation, MS-1) had as high as 25-fold enhancement of the sensitivity, whereas further separation of the nucleolin-inducing far-between Fe3O4@PPY from the FRET inhibition solution (the second magnetic separation, MS-2) could further enhance the sensitivity to 35-fold. Finally, the MS-FRET inhibition assay displayed the linear range of 0.625-27.5 μg L(-1) (8.1-359 pM) and detection limit of 0.04 μg L(-1) (0.05 pM) of nucleolin. The fluorescence intensity recovery (the percentage ratio of the final restoring fluorescence intensity to the quenched fluorescence intensity of Cy5.5-AS1411 solution by 0.09 g L(-1) Fe3O4@PPY) was enhanced from 36% (for nonseparation) to 56% (for two magnetic separations). This is the first accurate evaluation for the effect of separating donor/acceptor species on the FRET inhibition assay.
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Affiliation(s)
- Yan-Ran Li
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology (Nankai University), Tianjin Key Laboratory of Molecular Recognition and Biosensing, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , 94 Weijin Road, Tianjin 30071, China
| | - Qian Liu
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology (Nankai University), Tianjin Key Laboratory of Molecular Recognition and Biosensing, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , 94 Weijin Road, Tianjin 30071, China
| | - Zhangyong Hong
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology (Nankai University), Tianjin Key Laboratory of Molecular Recognition and Biosensing, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , 94 Weijin Road, Tianjin 30071, China
| | - He-Fang Wang
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology (Nankai University), Tianjin Key Laboratory of Molecular Recognition and Biosensing, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , 94 Weijin Road, Tianjin 30071, China
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36
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Zhang X, Daaboul GG, Spuhler PS, Freedman DS, Yurt A, Ahn S, Avci O, Ünlü MS. Nanoscale characterization of DNA conformation using dual-color fluorescence axial localization and label-free biosensing. Analyst 2015; 139:6440-9. [PMID: 25340741 DOI: 10.1039/c4an01425a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantitative determination of the density and conformation of DNA molecules tethered to the surface can help optimize and understand DNA nanosensors and nanodevices, which use conformational or motional changes of surface-immobilized DNA for detection or actuation. We present an interferometric sensing platform that combines (i) dual-color fluorescence spectroscopy for precise axial co-localization of two fluorophores attached at different nucleotides of surface-immobilized DNA molecules and (ii) independent label-free quantification of biomolecule surface density at the same site. Using this platform, we examined the conformation of DNA molecules immobilized on a three-dimensional polymeric surface and demonstrated simultaneous detection of DNA conformational change and binding in real-time. These results demonstrate that independent quantification of both surface density and molecular nanoscale conformation constitutes a versatile approach for nanoscale solid-biochemical interface investigations and molecular binding assays.
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Affiliation(s)
- Xirui Zhang
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA 02215, USA.
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37
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Hong Y, Lee HJ, Kim SG, Kim BH, Yun GH, Yook JG. A Label-Free Biosensing Platform Using a PLL Circuit and Biotin-Streptavidin Binding System. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2015; 9:345-352. [PMID: 25314705 DOI: 10.1109/tbcas.2014.2349074] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper proposes a novel RF biosensor that utilizes a frequency synthesizer associated with a microstrip open-loop resonator for label-free biomolecular detection. The RF biosensor consists mainly of a resonance-assisted transducer and a phase locked loop (PLL) circuit. In this work, the performance of the RF biosensor is validated using the well-known biotin-streptavidin binding system. When biotin is bound to streptavidin, the input impedance of the resonator is varied, resulting in a change in the oscillation frequency. The concentration of the streptavidin is ultimately detected by a voltage signal of the PLL's loop filter with simple measurement equipment. According to the experimental results, the RF biosensor has revealed excellent sensitivity ( ~ 61 kHz/ngml(-1)) and a low detection limit ( ~ 1 ng/ml), as well as a rapid response. These results demonstrate that the RF biosensor can be an effective sensing platform for label-free detection in a biomolecular binding system.
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38
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Ayas S, Bakan G, Dana A. Rounding corners of nano-square patches for multispectral plasmonic metamaterial absorbers. OPTICS EXPRESS 2015; 23:11763-11770. [PMID: 25969267 DOI: 10.1364/oe.23.011763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Multispectral metamaterial absorbers based on metal-insulator-metal nano-square patch resonators are studied here. For a geometry consisting of perfectly nano-square patches and vertical sidewalls, double resonances in the visible regime are observed due to simultaneous excitation of electric and magnetic plasmon modes. Although slightly modifying the sizes of the square patches makes the resonance wavelengths simply shift, rounding corners of the square patches results in emergence of a third resonance due to excitation of the circular cavity modes. Sidewall angle of the patches are also observed to affect the absorption spectra significantly. Peak absorption values for the triple resonance structures are strongly affected as the sidewall angle varies from 90 to 50 degrees. Rounded corners and slanted sidewalls are typical imperfections for lithographically fabricated metamaterial structures. The presented results suggest that imperfections caused during fabrication of the top nano-structures must be taken into account when designing metamaterial absorbers. Furthermore, it is shown that these fabrication imperfections can be exploited for improving resonance properties and bandwidths of metamaterials for various potential applications such as solar energy harvesting, thermal emitters, surface enhanced spectroscopies and photodetection.
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39
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Yang G, Liu B, Cheng K, Du Z. Modulation of optical transmittance and conductivity by the period, linewidth and height of Au square mesh electrodes. OPTICS EXPRESS 2015; 23:A62-A70. [PMID: 25836254 DOI: 10.1364/oe.23.000a62] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Metal transparent conductive electrode (TCE) with surface plasmons has been extensively studied for light absorption enhancement in solar cells and light extraction in Light-Emitting Diodes etc. But its transparent conductive properties and surface plasmons are controlled by its micromorphologies and microstructures. In this work, photoelectric coupling effects and optical transmittance modulations of period, linewidth and height of Au nanowire in square mesh electrode were investigated detailedly using a comprehensive finite-difference time domain calculation stimulation, and then Au square mesh TCEs with the 500 nm in period, 70 nm in height and linewidth ranging from 60 to 100 nm were fabricated using electron beam lithography. The measured results showed that the optical transmittance of the TCEs is about 70% in the 350-700 nm wavelength range and over 80% in the 700-1000 nm range, which accord with the theoretical simulation results. Optical transmittance is affected by reflection loss, localized surface plasmon resonances and surface plasmon polarizations (SPPs) absorption loss, concerned about geometry parameters. SPPs dip peak position exhibits a blue-shift from 844 to 812 nm and the width of peak increases with increasing the linewidth from 60 to 100 nm, The measured surface resistivity of the TCEs with the 500 nm in period, 50 nm in height and 50 nm in linewidth is about 74.5 Ω/m(2), about two times bigger than that of commercial indium tin oxide glass.
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40
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Dodson SL, Cao C, Zaribafzadeh H, Li S, Xiong Q. Engineering plasmonic nanorod arrays for colon cancer marker detection. Biosens Bioelectron 2015; 63:472-477. [DOI: 10.1016/j.bios.2014.07.083] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 07/28/2014] [Accepted: 07/30/2014] [Indexed: 11/17/2022]
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41
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Abstract
We provide an overview covering the existing challenges and latest developments in achieving high selectivity and sensitivity cancer-biomarker detection.
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Affiliation(s)
- Li Wu
- Laboratory of Chemical Biology and Division of Biological Inorganic Chemistry
- State Key laboratory of Rare Earth Resource Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
| | - Xiaogang Qu
- Laboratory of Chemical Biology and Division of Biological Inorganic Chemistry
- State Key laboratory of Rare Earth Resource Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
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42
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Cho K, Loget G, Corn RM. Lithographically Patterned Nanoscale Electrodeposition of Plasmonic, Bimetallic, Semiconductor, Magnetic, and Polymer Nanoring Arrays. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2014; 118:28993-29000. [PMID: 25553204 PMCID: PMC4275153 DOI: 10.1021/jp501783z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 06/16/2014] [Indexed: 06/01/2023]
Abstract
Large area arrays of magnetic, semiconducting, and insulating nanorings were created by coupling colloidal lithography with nanoscale electrodeposition. This versatile nanoscale fabrication process allows for the independent tuning of the spacing, diameter, and width of the nanorings with typical values of 1.0 μm, 750 nm, and 100 nm, respectively, and was used to form nanorings from a host of materials: Ni, Co, bimetallic Ni/Au, CdSe, and polydopamine. These nanoring arrays have potential applications in memory storage, optical materials, and biosensing. A modified version of this nanoscale electrodeposition process was also used to create arrays of split gold nanorings. The size of the split nanoring opening was controlled by the angle of photoresist exposure during the fabrication process and could be varied from 50% down to 10% of the ring circumference. The large area (cm2 scale) gold split nanoring array surfaces exhibited strong polarization-dependent plasmonic absorption bands for wavelengths from 1 to 5 μm. Plasmonic nanoscale split ring arrays are potentially useful as tunable dichroic materials throughout the infrared and near-infrared spectral regions.
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43
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Cao C, Zhang J, Li S, Xiong Q. Intelligent and ultrasensitive analysis of mercury trace contaminants via plasmonic metamaterial-based surface-enhanced Raman spectroscopy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:3252-6. [PMID: 24729476 DOI: 10.1002/smll.201400165] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Indexed: 05/18/2023]
Abstract
Label-free molecular logic gates (AND, INHIBIT, and OR) are constructed based on specific conformation modulation of a guanine- and thymine-rich DNA, while the optical readout is enabled by the tunable metamaterials which serve as a substrate for surface enhanced Raman spectroscopy. The DNA logic is simple to operate, highly reproducible, and can be stimulated by ultra-low concentration of the external inputs, enabling an extremely sensitive detection of mercury ions down to 2 × 10(-4) ppb.
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Affiliation(s)
- Cuong Cao
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371
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Peng B, Li Z, Mutlugun E, Hernández Martínez PL, Li D, Zhang Q, Gao Y, Demir HV, Xiong Q. Quantum dots on vertically aligned gold nanorod monolayer: plasmon enhanced fluorescence. NANOSCALE 2014; 6:5592-5598. [PMID: 24739999 DOI: 10.1039/c3nr06341k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
CTAB-coated Au nanorods were directly self-assembled into a vertically aligned monolayer with highly uniform hot spots through a simple but robust approach. By coupling with CdSe/ZnS quantum dots, a maximum enhancement of 10.4 is achieved due to: increased excitation transition rate, radiative rate, and coupling efficiency of emission to the far field.
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Affiliation(s)
- Bo Peng
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.
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Zhang J, Cao C, Xu X, Liow C, Li S, Tan P, Xiong Q. Tailoring alphabetical metamaterials in optical frequency: plasmonic coupling, dispersion, and sensing. ACS NANO 2014; 8:3796-3806. [PMID: 24670107 DOI: 10.1021/nn500527f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Tailoring optical properties of artificial metamaterials, whose optical properties go beyond the limitations of conventional and naturally occurring materials, is of importance in fundamental research and has led to many important applications such as security imaging, invisible cloak, negative refraction, ultrasensitive sensing, and transformable and switchable optics. Herein, by precisely controlling the size, symmetry, and topology of alphabetical metamaterials with U, S, Y, H, U-bar, and V shapes, we have obtained highly tunable optical response covering visible-to-infrared (vis-NIR) optical frequency. In addition, we show a detailed study on the physical origin of resonance modes, plasmonic coupling, the dispersion of resonance modes, and the possibility of negative refraction. We have found that all the electronic and magnetic modes follow the dispersion of surface plasmon polaritons; thus, essentially they are electronic- and magnetic-surface-plasmon-polaritons-like (ESPP-like and MSPP-like) modes resulted from diffraction coupling between localized surface plasmon and freely propagating light. On the basis of the fill factor and formula of magnetism permeability, we predict that the alphabetical metamaterials should show the negative refraction capability in visible optical frequency. Furthermore, we have demonstrated the specific ultrasensitive surface enhanced Raman spectroscopy (SERS) sensing of monolayer molecules and femtomolar food contaminants by tuning their resonance to match the laser wavelength, or by tuning the laser wavelength to match the plasmon resonance of metamaterials. Our tunable alphabetical metamaterials provide a generic platform to study the electromagnetic properties of metamaterials and explore the novel applications in optical frequency.
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Affiliation(s)
- Jun Zhang
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371
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Wen X, Li G, Zhang J, Zhang Q, Peng B, Wong LM, Wang S, Xiong Q. Transparent free-standing metamaterials and their applications in surface-enhanced Raman scattering. NANOSCALE 2014; 6:132-139. [PMID: 24192898 DOI: 10.1039/c3nr04012g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Integration of metamaterials onto a flexible substrate can provide many advantages such as transparency, deformability, light weight and biocompatibility. Here we demonstrate a simple and convenient nickel sacrificial layer-assisted transfer method to fabricate visible-near infrared (IR) metamaterials embedded into a thin polydimethylsiloxane (PDMS) film. Both the structures and the optical properties are maintained after transferring into the PDMS film from a rigid substrate. This PDMS-based metamaterial can behave as a high performance surface enhanced Raman scattering (SERS) device with tunable plasmonic bands, which decouple the preparation of SERS structure and the linkage of targeted molecules to the plasmonic structures. By simply covering the PDMS metamaterials device on the surface with molecules of interest, we demonstrate the application of 2-naphthalenethiol molecules self-assembled on a Au film, highlighting the considerable potential of these PDMS metamaterials as a SERS stamp onto any other substrate. What's more, the PDMS-based nanostructures offer a representative model to investigate the interaction between the plasmonic nanostructure and the substrate consisting of different materials by placing PDMS on the surface of the substrate.
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Affiliation(s)
- Xinglin Wen
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.
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Lee J, Hua B, Park S, Ha M, Lee Y, Fan Z, Ko H. Tailoring surface plasmons of high-density gold nanostar assemblies on metal films for surface-enhanced Raman spectroscopy. NANOSCALE 2014; 6:616-623. [PMID: 24247586 DOI: 10.1039/c3nr04752k] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Plasmonic systems based on metal nanoparticles on a metal film have generated great interest for surface-enhanced Raman spectroscopy (SERS) chemical sensors. In this study, we describe the fabrication of ultrasensitive SERS substrates based on high-density gold nanostar assemblies on silver films with tailored surface plasmons, where multiple field enhancements from particle-film and interparticle plasmon couplings and lightening rod effects of sharp tips of nanostars contribute to the enormous Raman enhancements. We show that the interplay between interparticle and particle-film plasmon couplings of high-density gold nanostars (GNSs) on metal and dielectric films as a function of interparticle separation can be tailored to provide maximum SERS effects. We observe that the SERS enhancement factor (EF) of GNSs on a metal film as a function of interparticle separation follows a broken power law function, where the EF increases with the interparticle separation for the strong interparticle coupling range below an interparticle separation of ~0.8 times the GNS size, but decreases for the weak interparticle coupling range (for an interparticle separation of >0.8 times the GNS size). Finally, we demonstrate the use of tailored plasmonic substrates as ultrasensitive SERS chemical sensors with an attomole level of detection capability of 2,4-dinitrotoluene, a model compound of nitroaromatic explosives.
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Affiliation(s)
- Jiwon Lee
- School of Energy and Chemical Engineering, Ulsan National Institute Science and Technology (UNIST), Ulsan, Republic of Korea.
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Zhang Q, Wen X, Li G, Ruan Q, Wang J, Xiong Q. Multiple magnetic mode-based Fano resonance in split-ring resonator/disk nanocavities. ACS NANO 2013; 7:11071-11078. [PMID: 24215162 DOI: 10.1021/nn4047716] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Plasmonic Fano resonance, enabled by the weak interaction between a bright super-radiant and a subradiant resonance mode, not only is fundamentally interesting, but also exhibits potential applications ranging from extraordinary optical transmission to biosensing. Here, we demonstrate strong Fano resonances in split-ring resonators/disk (SRR/D) nanocavities. The high-order magnetic modes are observed in SRRs by polarization-resolved transmission spectroscopy. When a disk is centered within the SRRs, multiple high-order magnetic modes are coupled to a broad electric dipole mode of SRR/D, leading to significant Fano resonance spectral features in near-IR regime. The strength and line shape of the Fano resonances are tuned through varying the SRR split-angle and interparticle distance between SRR and disk. Finite-difference-time-domain (FDTD) simulations are conducted to understand the coupling mechanism, and the results show good agreement with experimental data. Furthermore, the coupled structure gives a sensitivity of ∼282 nm/RIU with a figure of merit ∼4.
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Affiliation(s)
- Qing Zhang
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371
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