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Nathanael K, Cheng S, Kovalchuk NM, Arcucci R, Simmons MJ. Optimization of microfluidic synthesis of silver nanoparticles: a generic approach using machine learning. Chem Eng Res Des 2023. [DOI: 10.1016/j.cherd.2023.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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2
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Electrochemical Synthesis of Plasmonic Nanostructures. Molecules 2022; 27:molecules27082485. [PMID: 35458688 PMCID: PMC9027786 DOI: 10.3390/molecules27082485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/01/2022] [Accepted: 04/08/2022] [Indexed: 11/23/2022] Open
Abstract
Thanks to their tunable and strong interaction with light, plasmonic nanostructures have been investigated for a wide range of applications. In most cases, controlling the electric field enhancement at the metal surface is crucial. This can be achieved by controlling the metal nanostructure size, shape, and location in three dimensions, which is synthetically challenging. Electrochemical methods can provide a reliable, simple, and cost-effective approach to nanostructure metals with a high degree of geometrical freedom. Herein, we review the use of electrochemistry to synthesize metal nanostructures in the context of plasmonics. Both template-free and templated electrochemical syntheses are presented, along with their strengths and limitations. While template-free techniques can be used for the mass production of low-cost but efficient plasmonic substrates, templated approaches offer an unprecedented synthetic control. Thus, a special emphasis is given to templated electrochemical lithographies, which can be used to synthesize complex metal architectures with defined dimensions and compositions in one, two and three dimensions. These techniques provide a spatial resolution down to the sub-10 nanometer range and are particularly successful at synthesizing well-defined metal nanoscale gaps that provide very large electric field enhancements, which are relevant for both fundamental and applied research in plasmonics.
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Yang T, Duncan TV. Challenges and potential solutions for nanosensors intended for use with foods. NATURE NANOTECHNOLOGY 2021; 16:251-265. [PMID: 33712739 DOI: 10.1038/s41565-021-00867-7] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
Nanotechnology-adapted detection technologies could improve the safety and quality of foods, provide new methods to combat fraud and be useful tools in our arsenal against bioterrorism. Yet despite hundreds of published studies on nanosensors each year targeted to the food and agriculture space, there are few nanosensors on the market in this area and almost no nanotechnology-enabled methods employed by public health agencies for food analysis. This Review shows that the field is currently being held back by technical, regulatory, political, legal, economic, environmental health and safety, and ethical challenges. We explore these challenges in detail and provide suggestions about how they may be surmounted. Strategies that may have particular effectiveness include improving funding opportunities and publication venues for nanosensor validation, social science and patent landscape studies; prioritizing research and development of nanosensors that are specifically designed for rapid analysis in non-laboratory settings; and incorporating platform cost and adaptability into early design decisions.
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Affiliation(s)
- Tianxi Yang
- Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, Bedford Park, IL, USA
| | - Timothy V Duncan
- Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, Bedford Park, IL, USA.
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Reyer A, Prinz A, Giancristofaro S, Schneider J, Bertoldo Menezes D, Zickler G, Bourret GR, Musso ME. Investigation of Mass-Produced Substrates for Reproducible Surface-Enhanced Raman Scattering Measurements over Large Areas. ACS APPLIED MATERIALS & INTERFACES 2017; 9:25445-25454. [PMID: 28737921 DOI: 10.1021/acsami.7b06002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is a versatile spectroscopic technique that suffers from reproducibility issues and usually requires complex substrate fabrication processes. In this article, we report the use of a simple mass production technology based on Blu-ray disc manufacturing technology to prepare large area SERS substrates (∼40 mm2) with a high degree of homogeneity (±7% variation in Raman signal) and enhancement factor of ∼6 × 106. An industrial high throughput injection molding process was used to generate periodic microstructured polymer substrates coated with a thin Ag film. A short chemical etching step produces a highly dense layer of Ag nanoparticles at the polymer surface, which leads to a large and reproducible Raman signal. Finite difference time domain simulations and cathodoluminescence mapping experiments suggest that the sample microstructure is responsible for the generation of SERS active nanostructures around the microwells. Comparison with commercial SERS substrates demonstrates the validity of our method to prepare cost-efficient, reliable, and sensitive SERS substrates.
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Affiliation(s)
- Andreas Reyer
- Department of Chemistry and Physics of Materials, University of Salzburg , Jakob-Haringer-Strasse 2a, 5020 Salzburg, Austria
| | - Adrian Prinz
- STRATEC Consumables GmbH, Sonystrasse 20, 5081 Anif/Salzburg, Austria
| | | | - Johannes Schneider
- Department of Chemistry and Physics of Materials, University of Salzburg , Jakob-Haringer-Strasse 2a, 5020 Salzburg, Austria
| | - Durval Bertoldo Menezes
- Department of Chemistry and Physics of Materials, University of Salzburg , Jakob-Haringer-Strasse 2a, 5020 Salzburg, Austria
- Federal Institute of Triângulo Mineiro, Doutor Randolfo Borges Júnior , 2900, Univerdecidade, 38064-300 Uberaba, Minas Gerias, Brazil
| | - Gregor Zickler
- Department of Chemistry and Physics of Materials, University of Salzburg , Jakob-Haringer-Strasse 2a, 5020 Salzburg, Austria
| | - Gilles R Bourret
- Department of Chemistry and Physics of Materials, University of Salzburg , Jakob-Haringer-Strasse 2a, 5020 Salzburg, Austria
| | - Maurizio E Musso
- Department of Chemistry and Physics of Materials, University of Salzburg , Jakob-Haringer-Strasse 2a, 5020 Salzburg, Austria
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Su Q, Nöll G. A sandwich-like strategy for the label-free detection of oligonucleotides by surface plasmon fluorescence spectroscopy (SPFS). Analyst 2016; 141:5784-5791. [PMID: 27484040 PMCID: PMC5166564 DOI: 10.1039/c6an01129b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cutting surface-bound optical molecular beacons results in a sandwich-like detection strategy with lower background fluorescence.
For the detection of oligonucleotides a sandwich-like detection strategy has been developed by which the background fluorescence is significantly lowered in comparison with surface-bound molecular beacons. Surface bound optical molecular beacons are DNA hairpin structures comprising a stem and a loop. The end of the stem is modified with a fluorophore and a thiol anchor for chemisorption on gold surfaces. In the closed state the fluorophore is in close proximity to the gold surface, and most of the fluorescence is quenched. After hybridization with a target the hairpin opens, the fluorophore and surface become separated, and the fluorescence drastically increases. Using this detection method the sensitivity is limited by the difference in the fluorescence intensity in the closed and open state. As the background fluorescence is mainly caused by non-quenched fluorophores, a strategy to reduce the background fluorescence is to cut the beacon in two halves. First a thiolated ssDNA capture probe strand (first half) is chemisorbed to a gold surface together with relatively short thiol spacers. Next the target is hybridized by one end to the surface-anchored capture probe and by the other to a fluorophore-labeled reporter probe DNA (second half). The signal readout is done by surface plasmon fluorescence spectroscopy (SPFS). Using this detection strategy the background fluorescence can be significantly lowered, and the detection limit is lowered by more than one order of magnitude. The detection of a target takes only a few minutes and the sensor chips can be used for multiple detection steps without a significant decrease in performance.
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Affiliation(s)
- Qiang Su
- Nöll Junior Research Group, Organic Chemistry, Chem. Biol. Dept., Faculty IV, Siegen University, Adolf-Reichwein-Str. 2, 57068 Siegen, Germany.
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Zhao J, Cao X, Liu X, Wang Z, Zhang C, White JC, Xing B. Interactions of CuO nanoparticles with the algae Chlorella pyrenoidosa: adhesion, uptake, and toxicity. Nanotoxicology 2016; 10:1297-305. [PMID: 27345461 DOI: 10.1080/17435390.2016.1206149] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The potential adverse effects of CuO nanoparticles (NPs) have increasingly attracted attention. Combining electron microscopic and toxicological investigations, we determined the adhesion, uptake, and toxicity of CuO NPs to eukaryotic alga Chlorella pyrenoidosa. CuO NPs were toxic to C. pyrenoidosa, with a 72 h EC50 of 45.7 mg/L. Scanning electron microscopy showed that CuO NPs were attached onto the surface of the algal cells and interacted with extracellular polymeric substances (EPS) excreted by the organisms. Transmission electron microscopy (TEM) showed that EPS layer of algae was thickened by nearly 4-fold after CuO NPs exposure, suggesting a possible protective mechanism. In spite of the thickening of EPS layer, CuO NPs were still internalized by endocytosis and were stored in algal vacuoles. TEM and electron diffraction analysis confirmed that the internalized CuO NPs were transformed to Cu2O NPs (d-spacing, ∼0.213 nm) with an average size approximately 5 nm. The toxicity investigation demonstrated that severe membrane damage was observed after attachment of CuO NPs with algae. Reactive oxygen species generation and mitochondrial depolarization were also noted upon exposure to CuO NPs. This work provides useful information on understanding the role of NPs-algae physical interactions in nanotoxicity.
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Affiliation(s)
- Jian Zhao
- a Institute of Costal Environmental Pollution Control, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China , Qingdao , China .,b Laboratory for Marine Ecology and Environmental Science , Qingdao National Laboratory for Marine Science and Technology, China , Qingdao , China
| | - Xuesong Cao
- a Institute of Costal Environmental Pollution Control, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China , Qingdao , China
| | - Xiaoyu Liu
- c Institute of Materials Science and Engineering, Ocean University of China , Qingdao , China
| | - Zhenyu Wang
- a Institute of Costal Environmental Pollution Control, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China , Qingdao , China .,b Laboratory for Marine Ecology and Environmental Science , Qingdao National Laboratory for Marine Science and Technology, China , Qingdao , China
| | - Chenchen Zhang
- a Institute of Costal Environmental Pollution Control, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China , Qingdao , China
| | - Jason C White
- d Department of Analytical Chemistry , The Connecticut Agricultural Experiment Station , New Haven , CT , USA , and
| | - Baoshan Xing
- e Stockbridge School of Agriculture, University of Massachusetts , Amherst , MA , USA
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Chen S, Su M, Zhang C, Gao M, Bao B, Yang Q, Su B, Song Y. Fabrication of Nanoscale Circuits on Inkjet-Printing Patterned Substrates. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:3928-33. [PMID: 26011403 DOI: 10.1002/adma.201500225] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 04/26/2015] [Indexed: 05/21/2023]
Abstract
Nanoscale circuits are fabricated by assembling different conducting materials (e.g., metal nanoparticles, metal nano-wires, graphene, carbon nanotubes, and conducting polymers) on inkjet-printing patterned substrates. This non-litho-graphy strategy opens a new avenue for integrating conducting building blocks into nanoscale devices in a cost-efficient manner.
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Affiliation(s)
- Shuoran Chen
- Key Laboratory of Green Printing, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Meng Su
- Key Laboratory of Green Printing, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Cong Zhang
- Key Laboratory of Green Printing, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
| | - Meng Gao
- Key Laboratory of Green Printing, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Bao
- Key Laboratory of Green Printing, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Qiang Yang
- Key Laboratory of Green Printing, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Su
- Key Laboratory of Green Printing, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
| | - Yanlin Song
- Key Laboratory of Green Printing, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
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Izak-Nau E, Huk A, Reidy B, Uggerud H, Vadset M, Eiden S, Voetz M, Himly M, Duschl A, Dusinska M, Lynch I. Impact of storage conditions and storage time on silver nanoparticles' physicochemical properties and implications for their biological effects. RSC Adv 2015. [DOI: 10.1039/c5ra10187e] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
A multi-parametric assessment of the impact of storage time/conditions and capping agent charge on the stability and toxicity of AgNPs showed agglomeration, dissolution, oxidation, capping agent degradation and attachment of Ag+ ions all play a role.
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Jiang X, Wu Y, Su B, Xie R, Yang W, Jiang L. Using micro to manipulate nano. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:258-264. [PMID: 23922285 DOI: 10.1002/smll.201301494] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 06/27/2013] [Indexed: 06/02/2023]
Abstract
A "Micro to nano" dewetting strategy is presented to generate multi-direction-controlled, precise-positioning 1D assemblies of conductive silver (Ag) NPs based on a superhydrophobicity-directed assembly strategy. Electrons can transport along linear NP assemblies and their behavior is sustained by coating a coaxial protecting layer outside the nanostructures. This new concept might open new routes for NP-based nanoelectronic circuit fabrication.
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Affiliation(s)
- Xiangyu Jiang
- State Key Laboratory of Supramolecular, Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China; Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences (ICCAS), Beijing, 100190, P. R. China
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Nöll G, Su Q, Heidel B, Yu Y. A reusable sensor for the label-free detection of specific oligonucleotides by surface plasmon fluorescence spectroscopy. Adv Healthc Mater 2014; 3:42-6. [PMID: 23788367 DOI: 10.1002/adhm.201300056] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 03/19/2013] [Indexed: 01/07/2023]
Abstract
The development of a reusable molecular beacon (MB)-based sensor for the label-free detection of specific oligonucleotides using surface plasmon fluorescence spectroscopy (SPFS) as the readout method is described. The MBs are chemisorbed at planar gold surfaces serving as fluorescence quenching units. Target oligonucleotides of 24 bases can be detected within a few minutes at high single-mismatch discrimination rates.
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Affiliation(s)
- Gilbert Nöll
- Nöll Junior Research Group for Nanotechnology, Siegen University, Faculty IV, Department of Chemistry-Biology, Organic Chemistry, Adolf-Reichwein-Str. 2, 57068 Siegen, Germany.
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Erickson EM, Thorum MS, Vasić R, Marinković NS, Frenkel AI, Gewirth AA, Nuzzo RG. In Situ Electrochemical X-ray Absorption Spectroscopy of Oxygen Reduction Electrocatalysis with High Oxygen Flux. J Am Chem Soc 2011; 134:197-200. [DOI: 10.1021/ja210465x] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Evan M. Erickson
- Department
of Chemistry, University of Illinois at Urbana-Champaign, Urbana,
Illinois 61801, United States
| | - Matthew S. Thorum
- Department
of Chemistry, University of Illinois at Urbana-Champaign, Urbana,
Illinois 61801, United States
| | - Relja Vasić
- Physics Department, Yeshiva University, New York, New York 10016, United
States
| | - Nebojša S. Marinković
- Center for Catalytic
Science and
Technology, University of Delaware, Newark,
Delaware 19716, United States
| | - Anatoly I. Frenkel
- Physics Department, Yeshiva University, New York, New York 10016, United
States
| | - Andrew A. Gewirth
- Department
of Chemistry, University of Illinois at Urbana-Champaign, Urbana,
Illinois 61801, United States
| | - Ralph G. Nuzzo
- Department
of Chemistry, University of Illinois at Urbana-Champaign, Urbana,
Illinois 61801, United States
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Shirman T, Kaminker R, Freeman D, van der Boom ME. Halogen-bonding mediated stepwise assembly of gold nanoparticles onto planar surfaces. ACS NANO 2011; 5:6553-6563. [PMID: 21749110 DOI: 10.1021/nn201923q] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this study halogen bonding (XB) is used as the driving force for the noncovalent assembly of gold nanoparticles (AuNPs) on silicon and quartz substrates functionalized with organic monolayers. The AuNPs are functionalized with XB-donor ligands, whereas the monolayers have pyridine groups as XB-acceptors. The surface-confined systems are formed by iteratively exposing the monolayers to solutions of organic cross-linkers having 2-4 pyridine groups and functionalized AuNPs. UV-vis spectroscopy, atomic force microscopy (AFM), and scanning electron microscopy (SEM) reveal how the structure of the resulting surface-bound assemblies are controlled by (i) the properties of the monolayers, (ii) the molecular structure and the number of XB binding sites of the organic cross-linker, and (iii) the number of functionalized AuNP and cross-linker deposition steps. Moreover, these structures exhibit surface-enhanced Raman scattering and significant changes are observed in the morphology of some of the surface-bound assemblies upon aging.
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Affiliation(s)
- Tanya Shirman
- Department of Organic Chemistry, The Weizmann Institute of Science , Rehovot 76100, Israel
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Wang L, Li H, Luo Y, Zhang Y, Tian J, Sun X. Detection of single-stranded nucleic acids by hybridization of probe oligonucleotides on polystyrene nanospheres and subsequent release and recovery of fluorescence. RSC Adv 2011. [DOI: 10.1039/c1ra00241d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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