1
|
V Grayli S, Kamal S, Leach GW. High performance, single crystal gold bowtie nanoantennas fabricated via epitaxial electroless deposition. Sci Rep 2023; 13:12745. [PMID: 37550311 PMCID: PMC10406868 DOI: 10.1038/s41598-023-38154-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 07/04/2023] [Indexed: 08/09/2023] Open
Abstract
Material quality plays a critical role in the performance of nanometer-scale plasmonic structures and represents a significant hurdle to large-scale device integration. Progress has been hindered by the challenges of realizing scalable, high quality, ultrasmooth metal deposition strategies, and by the poor pattern transfer and device fabrication yields characteristic of most metal deposition approaches which yield polycrystalline metal structure. Here we highlight a novel and scalable electrochemical method to deposit ultrasmooth, single-crystal (100) gold and to fabricate a series of bowtie nanoantennas through subtractive nanopatterning. We investigate some of the less well-explored design and performance characteristics of these single-crystal nanoantennas in relation to their polycrystalline counterparts, including pattern transfer and device yield, polarization response, gap-field magnitude, and the ability to model accurately the antenna local field response. Our results underscore the performance advantages of single-crystal nanoscale plasmonic materials and provide insight into their use for large-scale manufacturing of plasmon-based devices. We anticipate that this approach will be broadly useful in applications where local near-fields can enhance light-matter interactions, including for the fabrication of optical sensors, photocatalytic structures, hot carrier-based devices, and nanostructured noble metal architectures targeting nano-attophysics.
Collapse
Affiliation(s)
- Sasan V Grayli
- Institute for Quantum Computing, University of Waterloo, 200 University Ave W., Waterloo, ON, N2L 3G1, Canada
| | - Saeid Kamal
- Laboratory for Advanced Spectroscopy and Imaging Research, Simon Fraser University, 8888 University Dr, Burnaby, BC, V5A 1S6, Canada
| | - Gary W Leach
- Laboratory for Advanced Spectroscopy and Imaging Research, and 4D LABS, Department of Chemistry, Simon Fraser University, 8888 University Dr, Burnaby, BC, V5A 1S6, Canada.
| |
Collapse
|
2
|
Gadore V, Mishra SR, Ahmaruzzaman M. Metal sulphides and their heterojunctions for photocatalytic degradation of organic dyes-A comprehensive review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:90410-90457. [PMID: 37474851 DOI: 10.1007/s11356-023-28753-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 07/08/2023] [Indexed: 07/22/2023]
Abstract
Water pollution caused by organic dyes is one of the greatest threats to the ecosystem. The removal of dyes from water has remained a challenge for scientists. Recently, metal sulphides have emerged as a potential candidate for water remediation applications. The efficient charge transportation, greater surface-active sites, and low bandgap of metal sulphides make them an excellent choice of semiconductor photocatalysts for degradation of dyes. This review summarises the potential application of metal sulphides and their heterojunctions for the photocatalytic degradation of organic dyes from wastewater. A detailed study has been presented on the synthesis, basics of photodegradation and heterojunctions and photocatalytic activity. The effect of the use of templates, doping agents, synthesis route, and various other factors affecting the photocatalytic activity of metal sulphides have been summarised in this review. The synthesis techniques, characterisation techniques, mechanism of degradation of organic dyes by Z-scheme heterojunction photocatalyst, reusability and stability of metal sulphides, and the scope of future research are also discussed. This study indicates that Scopus-based core gathered data could be used to give an objective overview of the global dye degradation research from 2008 to 2023 (15 years). All data (articles, authors, keywords, and publications) is compiled in the Scopus database. For the bibliometric study, 1962 papers relevant to dye photodegradation by sulfide-based photocatalysts were found, and this number rises yearly. A bibliometric analysis provides a 15-year evaluation of the state-of-the-art research on the impact of metal sulfide-based photocatalysts on the photodegradation of dyes.
Collapse
Affiliation(s)
- Vishal Gadore
- Department of Chemistry, National Institute of Technology Silchar, 788010, Silchar, Assam, India
| | - Soumya Ranjan Mishra
- Department of Chemistry, National Institute of Technology Silchar, 788010, Silchar, Assam, India
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology Silchar, 788010, Silchar, Assam, India.
| |
Collapse
|
3
|
AdibAmini S, Sari AH, Dorranian D. Optical properties of synthesized Au/Ag Nanoparticles using 532 nm and 1064 nm pulsed laser ablation: effect of solution concentration. SN APPLIED SCIENCES 2023. [DOI: 10.1007/s42452-023-05310-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
AbstractThe primary objective of this experimental research is to introduce the capacity of laser irradiation into the synthesis of bimetallic nanoparticles from noble metals. Gold and silver nanoparticles are produced through the laser ablating gold and silver targets in distilled water. Originally, the samples are synthesized by using Nd:YAG laser with 1064 nm wavelength and 7 ns pulse width. Following this, solutions mixed with different volumetric ratios, are irradiated by the second harmonic of the said laser at 532 nm wavelength. The absorption peak of gold nanoparticles around 530 nm, is used to transfer the laser energy to nanoparticles and synthesize Au/Ag bimetallic nanoparticles. The wavelength and volumetric ratio of solutions are the experiment's variables. The bimetallic nanoparticles are characterized as follows: X-ray diffraction pattern, spectroscopy in the range of UV–Vis-NIR and IR, Photoluminescence spectrum, Dynamic light scattering, and Fourier transform infrared spectroscopy. Additionally, FE-SEM and TEM images are used to study the size and morphology of nanoparticles. One of the aims of the research is to investigate the effects of laser wavelength and different volumetric concentrations on the optical properties of Au/Ag bimetallic nanoparticles. On the other hand, the study revealed that silver concentration and laser wavelength in the synthesis of Au/Ag bimetallic nanoparticles with different structures, cause the formation of crystalline structure, growth of grain size, and therefore silver oxide reduction.
Collapse
|
4
|
Dieperink M, Scalerandi F, Albrecht W. Correlating structure, morphology and properties of metal nanostructures by combining single-particle optical spectroscopy and electron microscopy. NANOSCALE 2022; 14:7460-7472. [PMID: 35481561 DOI: 10.1039/d1nr08130f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The nanoscale morphology of metal nanostructures directly defines their optical, catalytic and electronic properties and even small morphological changes can cause significant property variations. On the one hand, this dependence allows for precisely tuning and exploring properties by shape engineering; next to advanced synthesis protocols, post-synthesis modification through tailored laser modification has become an emerging tool to do so. On the other hand, with this interconnection also comes the quest for detailed structure-property correlation and understanding of laser-induced reshaping processes on the individual nanostructure level beyond ensemble averages. With the development of single-particle (ultrafast) optical spectroscopy techniques and advanced electron microscopy such understanding can in principle be gained at the femtosecond temporal and atomic spatial scale, respectively. However, accessing both on the same individual nanostructure is far from straightforward as it requires the combination of optical spectroscopy and electron microscopy. In this Minireview, we highlight key studies from recent years that performed such correlative measurements on the same individual metal nanostructure either in a consecutive ex situ manner or in situ inside the electron microscope. We demonstrate that such a detailed correlation is critical for revealing the full picture of the structure-property relationship and the physics behind light-induced nanostructure modifications. We put emphasis on the advantages and disadvantages of each methodology as well as on the unique information that one can gain only by correlative studies performed on the same individual nanostructure and end with an outlook on possible further development of this field in the near future.
Collapse
Affiliation(s)
- Mees Dieperink
- Department of Sustainable Energy Materials, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
| | - Francesca Scalerandi
- Department of Sustainable Energy Materials, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
| | - Wiebke Albrecht
- Department of Sustainable Energy Materials, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
| |
Collapse
|
5
|
Santos O, Cancino-Bernardi J, Pincela Lins PM, Sampaio D, Pavan T, Zucolotto V. Near-Infrared Photoactive Theragnostic Gold Nanoflowers for Photoacoustic Imaging and Hyperthermia. ACS APPLIED BIO MATERIALS 2021; 4:6780-6790. [PMID: 35006978 DOI: 10.1021/acsabm.1c00519] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Branched anisotropic gold nanostructures present distinguished performance acting both as contrast agents for photoacoustic imaging and as active agents for photothermal therapies. Despite advances in their fabrication methods, the synthesis of such gold nanomaterials in a simple and reproducible way is still a challenge. In this paper, we report the development of branched anisotropic gold nanoparticles, the so-called gold nanoflowers (AuNFs), as near-infrared active theragnostic materials for cancer therapy and diagnosis. In situ chemical synthesis of the AuNFs was optimized to obtain monodisperse nanoflowers with controllable size and optical properties. Upon varying the temperature and gold ion concentrations, it was possible to tune the optical activity of the nanoparticles from 590 to 960 nm. The AuNFs exhibited good stability in the cell culture medium, and under laser irradiation. Photoacoustic imaging revealed that the NFs could be imaged in phantom systems even at low concentrations. In vitro tests revealed that the nanoflowers were effective in the photothermal therapy of a rat hepatocarcinoma (HTC) cell lineage. In addition, no toxicity was observed to mouse fibroblast (FC3H) cells incubated with the AuNFs. Our results reveal a simple method to synthesize branched anisotropic gold nanostructures, which is a promising platform for photothermal and photoacoustic therapies.
Collapse
Affiliation(s)
- Olavo Santos
- Nanomedicine and Nanotoxicology Group, Physics Institute of São Carlos, University of São Paulo, São Paulo 13566-590, Brazil
| | - Juliana Cancino-Bernardi
- Nanomedicine and Nanotoxicology Group, Physics Institute of São Carlos, University of São Paulo, São Paulo 13566-590, Brazil
| | - Paula Maria Pincela Lins
- Nanomedicine and Nanotoxicology Group, Physics Institute of São Carlos, University of São Paulo, São Paulo 13566-590, Brazil
| | | | - Theo Pavan
- Innovation Group in Medical Instrumentation and Ultrasound (GIIMUS), Physics Department of the Faculty of Philosophy, Sciences and Letters of Ribeirão Preto, University of Sao Paulo, São Paulo 05508-220, Brazil
| | - Valtencir Zucolotto
- Nanomedicine and Nanotoxicology Group, Physics Institute of São Carlos, University of São Paulo, São Paulo 13566-590, Brazil
| |
Collapse
|
6
|
Preparation and properties of Ag plasmonic structures on garnet substrates. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-020-01624-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
7
|
Anapole mediated giant photothermal nonlinearity in nanostructured silicon. Nat Commun 2020; 11:3027. [PMID: 32541692 PMCID: PMC7296001 DOI: 10.1038/s41467-020-16845-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 05/28/2020] [Indexed: 11/09/2022] Open
Abstract
Featured with a plethora of electric and magnetic Mie resonances, high index dielectric nanostructures offer a versatile platform to concentrate light-matter interactions at the nanoscale. By integrating unique features of far-field scattering control and near-field concentration from radiationless anapole states, here, we demonstrate a giant photothermal nonlinearity in single subwavelength-sized silicon nanodisks. The nanoscale energy concentration and consequent near-field enhancements mediated by the anapole mode yield a reversible nonlinear scattering with a large modulation depth and a broad dynamic range, unveiling a record-high nonlinear index change up to 0.5 at mild incident light intensities on the order of MW/cm2. The observed photothermal nonlinearity showcases three orders of magnitude enhancement compared with that of unstructured bulk silicon, as well as nearly one order of magnitude higher than that through the radiative electric dipolar mode. Such nonlinear scattering can empower distinctive point spread functions in confocal reflectance imaging, offering the potential for far-field localization of nanostructured Si with an accuracy approaching 40 nm. Our findings shed new light on active silicon photonics based on optical anapoles.
Collapse
|
8
|
|
9
|
Mourdikoudis S, Pallares RM, Thanh NTK. Characterization techniques for nanoparticles: comparison and complementarity upon studying nanoparticle properties. NANOSCALE 2018; 10:12871-12934. [PMID: 29926865 DOI: 10.1039/c8nr02278j] [Citation(s) in RCA: 574] [Impact Index Per Article: 95.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Nanostructures have attracted huge interest as a rapidly growing class of materials for many applications. Several techniques have been used to characterize the size, crystal structure, elemental composition and a variety of other physical properties of nanoparticles. In several cases, there are physical properties that can be evaluated by more than one technique. Different strengths and limitations of each technique complicate the choice of the most suitable method, while often a combinatorial characterization approach is needed. In addition, given that the significance of nanoparticles in basic research and applications is constantly increasing, it is necessary that researchers from separate fields overcome the challenges in the reproducible and reliable characterization of nanomaterials, after their synthesis and further process (e.g. annealing) stages. The principal objective of this review is to summarize the present knowledge on the use, advances, advantages and weaknesses of a large number of experimental techniques that are available for the characterization of nanoparticles. Different characterization techniques are classified according to the concept/group of the technique used, the information they can provide, or the materials that they are destined for. We describe the main characteristics of the techniques and their operation principles and we give various examples of their use, presenting them in a comparative mode, when possible, in relation to the property studied in each case.
Collapse
Affiliation(s)
- Stefanos Mourdikoudis
- Biophysics Group, Department of Physics and Astronomy, University College London, London, WC1E 6BT, UK.
| | | | | |
Collapse
|
10
|
Mertens J, Kleemann ME, Chikkaraddy R, Narang P, Baumberg JJ. How Light Is Emitted by Plasmonic Metals. NANO LETTERS 2017; 17:2568-2574. [PMID: 28267346 DOI: 10.1021/acs.nanolett.7b00332] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The mechanism by which light is emitted from plasmonic metals such as gold and silver has been contentious, particularly at photon energies below direct interband transitions. Using nanoscale plasmonic cavities, blue-pumped light emission is found to directly track dark-field scattering on individual nanoconstructs. By exploiting slow atomic-scale restructuring of the nanocavity facets to spectrally tune the dominant gap plasmons, this correlation can be measured from 600 to 900 nm in gold, silver, and mixed constructs ranging from spherical to cube nanoparticles-on-mirror. We show that prompt electronic Raman scattering is responsible and confirm that "photoluminescence", which implies phase and energy relaxation, is not the right description. Our model suggests how to maximize light emission from metals.
Collapse
Affiliation(s)
- Jan Mertens
- NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, United Kingdom
| | - Marie-Elena Kleemann
- NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, United Kingdom
| | - Rohit Chikkaraddy
- NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, United Kingdom
| | - Prineha Narang
- Faculty of Arts and Sciences, Harvard University , Cambridge, Massachusetts 02138, United States
| | - Jeremy J Baumberg
- NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, United Kingdom
| |
Collapse
|
11
|
Kravets V, Almemar Z, Jiang K, Culhane K, Machado R, Hagen G, Kotko A, Dmytruk I, Spendier K, Pinchuk A. Imaging of Biological Cells Using Luminescent Silver Nanoparticles. NANOSCALE RESEARCH LETTERS 2016; 11:30. [PMID: 26781288 PMCID: PMC4717127 DOI: 10.1186/s11671-016-1243-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 01/07/2016] [Indexed: 05/25/2023]
Abstract
The application of luminescent silver nanoparticles as imaging agents for neural stem and rat basophilic leukemia cells was demonstrated. The experimental size dependence of the extinction and emission spectra for silver nanoparticles were also studied. The nanoparticles were functionalized with fluorescent glycine dimers. Spectral position of the resonance extinction and photoluminescence emission for particles with average diameters ranging from 9 to 32 nm were examined. As the particle size increased, the spectral peaks for both extinction and the intrinsic emission of silver nanoparticles shifted to the red end of the spectrum. The intrinsic photoluminescence of the particles was orders of magnitude weaker and was spectrally separated from the photoluminescence of the glycine dimer ligands. The spectral position of the ligand emission was independent of the particle size; however, the quantum yield of the nanoparticle-ligand system was size-dependent. This was attributed to the enhancement of the ligand's emission caused by the local electric field strength's dependence on the particle size. The maximum quantum yield determined for the nanoparticle-ligand complex was (5.2 ± 0.1) %. The nanoparticles were able to penetrate cell membranes of rat basophilic leukemia and neural stem cells fixed with paraformaldehyde. Additionally, toxicity studies were performed. It was found that towards rat basophilic leukemia cells, luminescent silver nanoparticles had a toxic effect in the silver atom concentration range of 10-100 μM.
Collapse
Affiliation(s)
- Vira Kravets
- Physics Department, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
- Center for Biofrontiers Institute, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
- Taras Shevchenko National University of Kyiv, 4 Academic Glushkov Prospect, Kyiv, 01601, Ukraine.
| | - Zamavang Almemar
- Mechanical and Aerospace Engineering Department, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
| | - Ke Jiang
- Center for Biofrontiers Institute, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
| | - Kyle Culhane
- Physics Department, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
- Center for Biofrontiers Institute, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
| | - Rosa Machado
- Center for Biofrontiers Institute, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
| | - Guy Hagen
- Center for Biofrontiers Institute, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
| | - Andriy Kotko
- I.M. Frantsevich Institute for Problems of Material Science, 3 Krzhizhanovsky str., 03680, Kyiv, Ukraine.
| | - Igor Dmytruk
- Taras Shevchenko National University of Kyiv, 4 Academic Glushkov Prospect, Kyiv, 01601, Ukraine.
| | - Kathrin Spendier
- Physics Department, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
- Center for Biofrontiers Institute, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
| | - Anatoliy Pinchuk
- Physics Department, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
- Center for Biofrontiers Institute, University of Colorado, 1420, Austin Bluffs Parkway, 80918, Colorado Springs, CO, USA.
| |
Collapse
|
12
|
Livneh N, Harats MG, Istrati D, Eisenberg HS, Rapaport R. Highly Directional Room-Temperature Single Photon Device. NANO LETTERS 2016; 16:2527-32. [PMID: 26963878 DOI: 10.1021/acs.nanolett.6b00082] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
One of the most important challenges in modern quantum optical applications is the demonstration of efficient, scalable, on-chip single photon sources, which can operate at room temperature. In this paper we demonstrate a room-temperature single photon source based on a single colloidal nanocrystal quantum dot positioned inside a circular bulls-eye shaped hybrid metal-dielectric nanoantenna. Experimental results show that 20% of the photons are emitted into a very low numerical aperture (NA < 0.25), a 20-fold improvement over a free-standing quantum dot, and with a probability of more than 70% for a single photon emission. With an NA = 0.65 more than 35% of the single photon emission is collected. The single photon purity is limited only by emission from the metal, an obstacle that can be bypassed with careful design and fabrication. The concept presented here can be extended to many other types of quantum emitters. Such a device paves a promising route for a high purity, high efficiency, on-chip single photon source operating at room temperature.
Collapse
Affiliation(s)
- Nitzan Livneh
- Applied Physics Department, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel
| | - Moshe G Harats
- Racah Institute for Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel
| | - Daniel Istrati
- Racah Institute for Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel
| | - Hagai S Eisenberg
- Racah Institute for Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel
| | - Ronen Rapaport
- Applied Physics Department, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel
- Racah Institute for Physics, The Hebrew University of Jerusalem , Jerusalem 9190401, Israel
| |
Collapse
|
13
|
Patel MK, Ali MA, Krishnan S, Agrawal VV, Al Kheraif AA, Fouad H, Ansari Z, Ansari SG, Malhotra BD. A Label-Free Photoluminescence Genosensor Using Nanostructured Magnesium Oxide for Cholera Detection. Sci Rep 2015; 5:17384. [PMID: 26611737 PMCID: PMC4661725 DOI: 10.1038/srep17384] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 10/29/2015] [Indexed: 11/20/2022] Open
Abstract
Nanomaterial-based photoluminescence (PL) diagnostic devices offer fast and highly sensitive detection of pesticides, DNA, and toxic agents. Here we report a label-free PL genosensor for sensitive detection of Vibrio cholerae that is based on a DNA hybridization strategy utilizing nanostructured magnesium oxide (nMgO; size >30 nm) particles. The morphology and size of the synthesized nMgO were determined by transmission electron microscopic (TEM) studies. The probe DNA (pDNA) was conjugated with nMgO and characterized by X-ray photoelectron and Fourier transform infrared spectroscopic techniques. The target complementary genomic DNA (cDNA) isolated from clinical samples of V. cholerae was subjected to DNA hybridization studies using the pDNA-nMgO complex and detection of the cDNA was accomplished by measuring changes in PL intensity. The PL peak intensity measured at 700 nm (red emission) increases with the increase in cDNA concentration. A linear range of response in the developed PL genosensor was observed from 100 to 500 ng/μL with a sensitivity of 1.306 emi/ng, detection limit of 3.133 ng/μL and a regression coefficient (R(2)) of 0.987. These results show that this ultrasensitive PL genosensor has the potential for applications in the clinical diagnosis of cholera.
Collapse
Affiliation(s)
- Manoj Kumar Patel
- Biomedical Instrumentation Section, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India
- Department of Chemistry, College of Arts and Sciences, Oklahoma State University, Stillwater, Oklahoma 74078, United States of America
| | - Md. Azahar Ali
- Biomedical Instrumentation Section, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
- Department of Electrical and Computer Engineering, Iowa State University, Ames, IA 50011, United States of America
| | - Sadagopan Krishnan
- Department of Chemistry, College of Arts and Sciences, Oklahoma State University, Stillwater, Oklahoma 74078, United States of America
| | - Ved Varun Agrawal
- Biomedical Instrumentation Section, CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India
| | - AbdulAziz A. Al Kheraif
- Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Science, King Saud University, Riyadh, 11437 Saudi Arabia
| | - H. Fouad
- Dental Biomaterials Research Chair, Dental Health Department, College of Applied Medical Science, King Saud University, Riyadh, 11437 Saudi Arabia
- Biomedical Engineering Department, Faculty of Engineering, Helwan University, 11792, Egypt
| | - Z.A. Ansari
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - S. G. Ansari
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Bansi D. Malhotra
- Department of Biotechnology, Delhi Technological University, Shahabad Daulatpur, Main Bawana Road, Delhi 110042, India
| |
Collapse
|
14
|
Jiang L, Yin T, Dong Z, Liao M, Tan SJ, Goh XM, Allioux D, Hu H, Li X, Yang JKW, Shen Z. Accurate Modeling of Dark-Field Scattering Spectra of Plasmonic Nanostructures. ACS NANO 2015; 9:10039-46. [PMID: 26344543 DOI: 10.1021/acsnano.5b03622] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Dark-field microscopy is a widely used tool for measuring the optical resonance of plasmonic nanostructures. However, current numerical methods for simulating the dark-field scattering spectra were carried out with plane wave illumination either at normal incidence or at an oblique angle from one direction. In actual experiments, light is focused onto the sample through an annular ring within a range of glancing angles. In this paper, we present a theoretical model capable of accurately simulating the dark-field light source with an annular ring. Simulations correctly reproduce a counterintuitive blue shift in the scattering spectra from gold nanodisks with a diameter beyond 140 nm. We believe that our proposed simulation method can be potentially applied as a general tool capable of simulating the dark-field scattering spectra of plasmonic nanostructures as well as other dielectric nanostructures with sizes beyond the quasi-static limit.
Collapse
Affiliation(s)
- Liyong Jiang
- Nanophotonic Laboratory, Department of Physics, Nanjing University of Science and Technology , Nanjing 210094, China
- Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Tingting Yin
- Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Zhaogang Dong
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) , 3 Research Link, Singapore 117602
| | - Mingyi Liao
- School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Shawn J Tan
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) , 3 Research Link, Singapore 117602
| | - Xiao Ming Goh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) , 3 Research Link, Singapore 117602
| | - David Allioux
- School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Hailong Hu
- School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Xiangyin Li
- Nanophotonic Laboratory, Department of Physics, Nanjing University of Science and Technology , Nanjing 210094, China
| | - Joel K W Yang
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) , 3 Research Link, Singapore 117602
- Singapore University of Technology and Design , 8 Somapah Road, Singapore 487372
| | - Zexiang Shen
- Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
- School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| |
Collapse
|
15
|
Huang D, Byers CP, Wang LY, Hoggard A, Hoener B, Dominguez-Medina S, Chen S, Chang WS, Landes CF, Link S. Photoluminescence of a Plasmonic Molecule. ACS NANO 2015; 9:7072-9. [PMID: 26165983 DOI: 10.1021/acsnano.5b01634] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Photoluminescent Au nanoparticles are appealing for biosensing and bioimaging applications because of their non-photobleaching and non-photoblinking emission. The mechanism of one-photon photoluminescence from plasmonic nanostructures is still heavily debated though. Here, we report on the one-photon photoluminescence of strongly coupled 50 nm Au nanosphere dimers, the simplest plasmonic molecule. We observe emission from coupled plasmonic modes as revealed by single-particle photoluminescence spectra in comparison to correlated dark-field scattering spectroscopy. The photoluminescence quantum yield of the dimers is found to be surprisingly similar to the constituent monomers, suggesting that the increased local electric field of the dimer plays a minor role, in contradiction to several proposed mechanisms. Aided by electromagnetic simulations of scattering and absorption spectra, we conclude that our data are instead consistent with a multistep mechanism that involves the emission due to radiative decay of surface plasmons generated from excited electron-hole pairs following interband absorption.
Collapse
Affiliation(s)
- Da Huang
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Chad P Byers
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Lin-Yung Wang
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Anneli Hoggard
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Ben Hoener
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Sergio Dominguez-Medina
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Sishan Chen
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Wei-Shun Chang
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Christy F Landes
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| | - Stephan Link
- †Department of Chemistry and ‡Department of Electrical and Computer Engineering Laboratory for Nanophotonics, Rice University, Houston, Texas 77005, United States
| |
Collapse
|
16
|
Hugall JT, Baumberg JJ. Demonstrating photoluminescence from Au is electronic inelastic light scattering of a plasmonic metal: the origin of SERS backgrounds. NANO LETTERS 2015; 15:2600-4. [PMID: 25734469 PMCID: PMC4415038 DOI: 10.1021/acs.nanolett.5b00146] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 02/27/2015] [Indexed: 04/14/2023]
Abstract
Temperature-dependent surface-enhanced Raman scattering (SERS) is used to investigate the photoluminescence and background continuum always present in SERS but whose origin remains controversial. Both the Stokes and anti-Stokes background is found to be dominated by inelastic light scattering (ILS) from the electrons in the noble metal nanostructures supporting the plasmon modes. The anti-Stokes background is highly temperature dependent and is shown to be related to the thermal occupation of electronic states within the metal via a simple model. This suggests new routes to enhance SERS sensitivities, as well as providing ubiquitous and calibrated real-time temperature measurements of nanostructures.
Collapse
Affiliation(s)
- James T. Hugall
- NanoPhotonics Centre,
Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, United Kingdom
| | - Jeremy J. Baumberg
- NanoPhotonics Centre,
Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, United Kingdom
| |
Collapse
|
17
|
Heo KC, Gwag JS. Shape-modification of patterned nanoparticles by an ion beam treatment. Sci Rep 2015; 5:8523. [PMID: 25687920 PMCID: PMC4330533 DOI: 10.1038/srep08523] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 01/22/2015] [Indexed: 11/30/2022] Open
Abstract
This paper evaluated a practical approach to the fabrication of arrays of non-spherical nanoparticles by colloidal etching without a mask involving exposure to a low energy ion beam. A spherical nanoparticle array was transferred using a soft nanolithography technique, which is a simple and effective pattern transfer method for nanostructures on the surface of thin adhesive polymers on a planar substrate, after placing the spherical nanoparticles on a patterned PDMS [poly(dimethysiloxane)] stamp produced from a patterned Si wafer. The resulting non-spherical nanoparticle array was driven from a spherical nanoparticle array shape-modified by ion beam irradiation. A well-arrayed layer of cone-like-shapes were produced using a head-on ion beam for different exposure times. Also, a variety of mushroom-like-shapes depending on the exposure angle were produced on a substrate with a well-arranged spherical nanoparticle array. This technique has potential applications in nanophotonics, field emission displays (FEDs) and microfluid.
Collapse
Affiliation(s)
- Kyong Chan Heo
- Department of Physics Yeungnam University, 214-1 Dae-dong, Gyeongsan 712-749, Korea
| | - Jin Seog Gwag
- Department of Physics Yeungnam University, 214-1 Dae-dong, Gyeongsan 712-749, Korea
| |
Collapse
|
18
|
He Y, Xia K, Lu G, Shen H, Cheng Y, Liu YC, Shi K, Xiao YF, Gong Q. Surface enhanced anti-Stokes one-photon luminescence from single gold nanorods. NANOSCALE 2015; 7:577-582. [PMID: 25418974 DOI: 10.1039/c4nr04879b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Anti-Stokes one-photon luminescence from a single gold nanorod is experimentally investigated. The anti-Stokes emission of gold nanorods is enhanced and strongly modulated by localized surface plasmon resonance (LSPR). It is found that the polarization dependence of the anti-Stokes emission is in strong correlation with that of the Stokes emission. Further experiments provide evidence that LSPR significantly enhanced both excitation and emission processes. Moreover, the line shape of the anti-Stokes emission is dependent on the surface temperature, which is related to the distribution of free electrons near the Fermi level. This discovery provides an effective method in principle to probe localized temperature at nanoscale dimension. Here, the reported results about the anti-Stokes emission provide more understanding for the photoemission process from the plasmonic nanostructures.
Collapse
Affiliation(s)
- Yingbo He
- State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China.
| | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Mitra J, Sharma A. Luminescent, ferromagnetic silver glyconanoparticles: synthesis to annealing-induced substrate specific transformation. RSC Adv 2015. [DOI: 10.1039/c5ra01324k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sugar cane juice has been harnessed as a green reducing agent for the synthesis of silver nanoparticles, followed by annealing of the latter into helical and rod-like structures on polymer and silicon surfaces respectively.
Collapse
Affiliation(s)
- Jaba Mitra
- Department of Chemical Engineering
- Indian Institute of Technology
- Kanpur
- India
| | - Ashutosh Sharma
- Department of Chemical Engineering
- Indian Institute of Technology
- Kanpur
- India
| |
Collapse
|