1
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Lee CH, Fang JKH. The onset of surface-enhanced Raman scattering for single-particle detection of submicroplastics. J Environ Sci (China) 2022; 121:58-64. [PMID: 35654516 DOI: 10.1016/j.jes.2021.08.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 08/14/2021] [Accepted: 08/17/2021] [Indexed: 06/15/2023]
Abstract
Microplastics represent an emerging environmental problem worldwide, raising ecological and food safety concerns. Compared to microplastics, there is growing evidence of an even higher abundance of submicro- and nanoplastics in the environment, but a reliable monitoring method for detecting these smaller-sized plastics is lacking. Herein we presented the application of surface-enhanced Raman scattering (SERS) for this purpose. Particles of polystyrene (PS; 600 nm) were used as the probe analyte. Gold nanourchins (AuNU; 50 nm), i.e. urchin-shaped nanoparticles with irregular spikes around the core, were used as the SERS-active substrate. The effectiveness of SERS on PS was evaluated at a single-particle level with different numbers of AuNU in order to determine the minimum conditions required for the onset of the SERS effect. Our findings suggest that SERS of a single particle of PS can be induced by as few as 1-5 particles of AuNU, and that the use of excitation wavelength at 785 nm is appropriate to meet the red-shifted surface plasmon resonance of AuNU upon aggregation. These specifications provide additional information for the development of SERS-based tools for detecting plastic particles < 1 µm in food and environmental samples.
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Affiliation(s)
- Cheng-Hao Lee
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China; Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China
| | - James Kar-Hei Fang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China; Research Institute for Future Food, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China; State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong SAR, China.
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2
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Nelis JLD, Salvador JP, Marco MP, Elliott CT, Campbell K. A plasmonic biosensor array exploiting plasmon coupling between gold nanorods and spheres for domoic acid detection via two methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 252:119473. [PMID: 33524817 DOI: 10.1016/j.saa.2021.119473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/08/2020] [Accepted: 01/10/2021] [Indexed: 06/12/2023]
Abstract
An immunoassay was developed that utilized plasmonic coupling between immobilised gold nanorods and colloid gold nanospheres to detect the marine toxin domoic acid (DA). The aspect ratio of the nanorods was optimised and the effects of variation in acidity, silver to gold ratio, cetyltrimethylammonium bromide (CTAB) concentration and seed addition in the growth solution on the yield, size variance and LSPR peak position was investigated. Excellent nanorods (size variation < 15%; aspect ratio 3.5-5; yield 0.26-0.35 nM mL-1) were obtained for the LSPR range 785-867 nm using strong acidic conditions (12 µl HCl (37%)), silver to gold ratio of 1:5, 0.05-0.1 M CTAB and 20-30 µl seed addition to 10 mL of growth solution. One set of nanorods (54.9 X 15.7 nm; LSPR 785 nm) were immobilised onto a silica support and bio-functionalised with DA hapten. Colloid nanospheres (15 nm; LSPR 519 nm) were bio-functionalised with an anti-domoic-acid monoclonal antibody. The functionalised nanoparticles were used to detect DA by plasmon coupling by quantifying the average LSPR shift of individual plasmon couples with hyperspectral imaging or quantifying the pixels count caused by the particle aggregation visible under darkfield microscopy. The first method led to a LSPR blue-shift of ~55 nm caused by the immunoreaction. The second, simpler method, enabled very clear qualitative detection (p < 0.0005) of domoic acid when 10 µM domoic acid was added. Both methods show potential though the novelty and simplicity of the second platform allowing rapid (~30 min) detection with high-throughput possibilities using a simple set-up is of most interest.
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Affiliation(s)
- Joost L D Nelis
- Institute for Global Food Security, School of Biological Sciences, Queen's University, 19 Chlorine Gardens, Belfast BT9 5DL, UK.
| | - J Pablo Salvador
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain; Nanobiotechnology for Diagnostics (Nb4D), Institute for Advanced Chemistry of Catalonia (IQAC) of the Spanish Council for Scientific Research (CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - M Pilar Marco
- Nanobiotechnology for Diagnostics (Nb4D), Institute for Advanced Chemistry of Catalonia (IQAC) of the Spanish Council for Scientific Research (CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Christopher T Elliott
- Institute for Global Food Security, School of Biological Sciences, Queen's University, 19 Chlorine Gardens, Belfast BT9 5DL, UK
| | - Katrina Campbell
- Institute for Global Food Security, School of Biological Sciences, Queen's University, 19 Chlorine Gardens, Belfast BT9 5DL, UK
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3
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Gorbunova M, Apyari V, Dmitrienko S, Zolotov Y. Gold nanorods and their nanocomposites: Synthesis and recent applications in analytical chemistry. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115974] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Olenin AY. Chemically Modified Silver and Gold Nanoparticles in Spectrometric Analysis. JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1134/s1061934819040099] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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5
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On-substrate porous-anodic-alumina-assisted gold nanostructure arrays: Meeting the challenges of various sizes and interfaces. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.11.192] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Olenin AY, Lisichkin GV. Preparation and Use of Chemically Modified Noble Metal Nanoparticles. RUSS J APPL CHEM+ 2018. [DOI: 10.1134/s107042721809001x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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7
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Lynn NS, Homola J. Microfluidic Analyte Transport to Nanorods for Photonic and Electrochemical Sensing Applications. Chemistry 2018; 24:12031-12036. [PMID: 30028546 PMCID: PMC6120472 DOI: 10.1002/chem.201802757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/13/2018] [Indexed: 11/24/2022]
Abstract
There has recently been a growing use of surface bound nanorods within electrochemical and optical sensing applications. Predictions of the microfluidic rate of analyte transport to such nanorods (either individual or to an array) remain important for sensor design and data analysis; however, such predictions are difficult, as nanorod aspect ratios can vary by several orders of magnitude. In this study, through the use of numerical simulation, we propose an explicit analytical approach to predict the steady-state diffusion-limited rate of mass transport to (individual) surface bound nanorods of variable aspect ratio. We show that, when compared to simulation, this approach provides accurate estimations across a wide range of Péclet numbers.
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Affiliation(s)
- N. Scott Lynn
- Institute of Photonics and ElectronicsCzech Academy of SciencesChaberská 5718251PragueCzech Republic
| | - Jiří Homola
- Institute of Photonics and ElectronicsCzech Academy of SciencesChaberská 5718251PragueCzech Republic
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8
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XU G, ZHU Y, PANG J. Sensitive and Simple Detection of Glucose Based on Single Plasmonic Nanorod. ANAL SCI 2017; 33:223-227. [DOI: 10.2116/analsci.33.223] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Gang XU
- Pharmaceutical Research Center and School of Chemistry and Chemical Engineering, Southeast University
| | - Yuhua ZHU
- School of Chemistry & Chemical Engineering, Nanjing University
| | - Jie PANG
- School of Chemistry & Chemical Engineering, Nanjing University
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9
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Tort N, Salvador JP, Marco MP. Multimodal plasmonic biosensing nanostructures prepared by DNA-directed immobilization of multifunctional DNA-gold nanoparticles. Biosens Bioelectron 2016; 90:13-22. [PMID: 27866079 DOI: 10.1016/j.bios.2016.11.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/27/2016] [Accepted: 11/08/2016] [Indexed: 02/02/2023]
Abstract
Biofunctional multimodal plasmonic nanostructures suitable for multiplexed localized surface plasmon resonance (LSPR) biosensing have been created by DNA-directed immobilization (DDI) of two distinct multifunctional biohybrid gold nanoparticles. Gold nanoparticles (AuNP) of distinct sizes, and therefore showing distinct plasmon resonant peaks (RP), have been biofunctionalized and codified with two different single stranded-DNA (ssDNA) chains. One of these oligonucleotide chains has been specifically designed to direct each AuNP to a distinct location of the surface of a DNA microarray chip through specific hybridization with complementary oligonucleotide strands. Scanning Electron Microscopy (SEM) has been used to demonstrate selective immobilization of each AuNP on distinct spots. The second ssDNA chain of the AuNPs provides the possibility to introduce by hybridization distinct types of bioactive molecules or bioreceptors, on a reversible manner. In this work, hapten-oligonucleotide bioconjugate probes, with sequences complementary to the second ssDNA linked to the AuNP, have been synthesized and used to create multiplexed hapten-biofuncionalized plasmonic nanostructures. The oligonucleotide probes consist on anabolic androgenic steroid haptens (AAS) covalently linked to specifically designed oligonucleotide sequences. The biofunctionality of these plasmonic nanostructures has been demonstrated by fluorescent microarray immunoassay and LSPR measurements, recording the shift of the RP produced after the antibody binding to the corresponding hapten-oligonucleotide probes immobilized on the nanostructured surface. Preliminary data show that this approach could allow manufacturing multifunctional multimodal LSPR chips for multiplexed analysis of different substances reaching very good detectability. Thus, small molecular weigh, analytes such as stanozolol (ST,) could be detected at concentrations in the low nM range. The results here presented open the door for an easy way to construct site-encoded multiplexed multimodal LSPR sensor transducers, combining the DDI strategies with multimodal biohybrid nanoparticles showing distinct optical properties.
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Affiliation(s)
- Nuria Tort
- Nanobiotechnology for Diagnostics (Nb4D), IQAC-CSIC, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - J-Pablo Salvador
- Nanobiotechnology for Diagnostics (Nb4D), IQAC-CSIC, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - M-Pilar Marco
- Nanobiotechnology for Diagnostics (Nb4D), IQAC-CSIC, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain.
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10
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Tong X, Wang Z, Sun X, Song J, Jacobson O, Niu G, Kiesewetter DO, Chen X. Size Dependent Kinetics of Gold Nanorods in EPR Mediated Tumor Delivery. Theranostics 2016; 6:2039-2051. [PMID: 27698939 PMCID: PMC5039679 DOI: 10.7150/thno.17098] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 09/01/2016] [Indexed: 12/11/2022] Open
Abstract
Gold nanorods (AuNR) have been intensively used in nanomedicine for cancer diagnostics and therapy, due to their excellent plasmonic photothermal properties. Tuning the size and aspect ratio of AuNR tailors the localized surface plasmon resonance (LSPR) in the NIR spectrum at which biological tissues are transparent, thus enables specific and effective treatment. The AuNR extravasates into tumor interstitium through enhanced permeation and retention (EPR) effect. Efficient AuNR based cancer therapy requires efficient AuNR tumor delivery. However, the size of AuNR can dramatically affect its blood circulation and tumor accumulation. Here we proposed for the first time a systematic framework to investigate the size-dependent kinetics of AuNRs during EPR mediated tumor delivery. By using 64Cu-labeled AuNRs with positron emission tomography (PET) and kinetic modeling, the in vivo uptake and kinetics of 64Cu-AuNR during its blood circulation, tumor accumulation and elimination were studied both in vitro and in vivo. The results of different sized AuNRs were compared and the optimum size of AuNR was suggested for EPR mediated tumor delivery. Our study provides a better understanding of the in vivo behavior of AuNR, which can help future design of nanomaterials for cancer imaging and therapy.
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11
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Athinarayanan J, Periasamy VS, A. Alshatwi A. Eco-friendly synthesis and characterization of platinum-copper alloy nanoparticles induce cell death in human cervical cancer cells. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Prakash J, Harris R, Swart H. Embedded plasmonic nanostructures: synthesis, fundamental aspects and their surface enhanced Raman scattering applications. INT REV PHYS CHEM 2016. [DOI: 10.1080/0144235x.2016.1187006] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Zhou B, Xiao X, Liu T, Gao Y, Huang Y, Wen W. Real-time concentration monitoring in microfluidic system via plasmonic nanocrescent arrays. Biosens Bioelectron 2016; 77:385-92. [DOI: 10.1016/j.bios.2015.09.054] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 09/03/2015] [Accepted: 09/23/2015] [Indexed: 01/09/2023]
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14
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Harris RA, Mlambo M, Mdluli PS. Qualitative analysis of some alkanethiols on Au nanoparticles during SERS. RSC Adv 2016. [DOI: 10.1039/c5ra24795k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The surface enhanced Raman spectroscopy enhancement factors (SERS EFs) for different AuNP–surfactant systems are measured and the observed trend is theoretically and qualitatively investigated.
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Affiliation(s)
- R. A. Harris
- University of the Free State
- Physics
- Bloemfontein
- South Africa
| | - M. Mlambo
- University of Pretoria
- Physics
- Pretoria
- South Africa
| | - P. S. Mdluli
- Durban University of Technology
- Chemistry
- Durban
- South Africa
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15
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Recent advances in chemical functionalization of nanoparticles with biomolecules for analytical applications. Anal Bioanal Chem 2015; 407:8627-45. [DOI: 10.1007/s00216-015-8981-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 08/03/2015] [Accepted: 08/13/2015] [Indexed: 01/04/2023]
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16
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Li P, Shi YW, Li BX, Xu WC, Shi ZL, Zhou C, Fu S. Photo-thermal effect enhances the efficiency of radiotherapy using Arg-Gly-Asp peptides-conjugated gold nanorods that target αvβ3 in melanoma cancer cells. J Nanobiotechnology 2015; 13:52. [PMID: 26315288 PMCID: PMC4552250 DOI: 10.1186/s12951-015-0113-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Accepted: 08/03/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Thermotherapy has been known to be one of the most effective adjuvants to radiotherapy (RT) in cancer treatment, but it is not widely implemented clinically due to some limitations, such as, inadequate temperature concentrations to the tumor tissue, nonspecific and non-uniform distribution of heat. So we constructed arginine-glycine-aspartate peptides-conjugated gold nanorods (RGD-GNRs) that target the alpha(v) beta(3) Integrin (αvβ3) and investigate whether the photo-thermal effect of RGD-GNRs by near infrared radiation (NIR) could enhance the efficiency of RT in melanoma cancer cells. RESULTS RGD-GNRs could be seen both on the surface of the cell membranes and cytoplasm of A375 cells with high expression of αvβ3. After exposed to 808 nm NIR, RGD-GNRs with various concentrations could be rapidly heated up. Compared to other treatments, flow cytometric analysis indicated that RT + NIR + RGD-GNRs increased apoptosis (p < 0.001) and decreased the proportion of cells in the more radioresistant S phase (p = 0.014). Treated with NIR + RGD-GNRs, the radiosensitivity was also significantly enhanced (DMFSF2: 1.41). CONCLUSION Results of the current study showed the feasibility of using RGD-GNRs for synergetic RT with photo-thermal therapy. And it would greatly benefit the therapeutic effects of refractory or recurrent malignant cancers.
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Affiliation(s)
- Ping Li
- Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, Fudan University Cancer Hospital, Shanghai, People's Republic of China. .,Department of Radiation Oncology, 6th People's Hospital of Jiao Tong University, Shanghai, People's Republic of China.
| | - Yi-Wen Shi
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
| | - Bing-Xin Li
- Department of Radiation Oncology, 6th People's Hospital of Jiao Tong University, Shanghai, People's Republic of China.
| | - Wen-Cai Xu
- Department of Radiation Oncology, Zhengzhou University He'nan Cancer Center, Zhengzhou, He'nan, People's Republic of China.
| | - Ze-Liang Shi
- Department of Radiation Oncology, 6th People's Hospital of Jiao Tong University, Shanghai, People's Republic of China.
| | - Chuanqing Zhou
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
| | - Shen Fu
- Department of Radiation Oncology, Shanghai Proton and Heavy Ion Center, Fudan University Cancer Hospital, Shanghai, People's Republic of China. .,Department of Radiation Oncology, 6th People's Hospital of Jiao Tong University, Shanghai, People's Republic of China.
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17
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Bagheri H, Talemi RP, Afkhami A. Gold nanoparticles deposited on fluorine-doped tin oxide surface as an effective platform for fabricating a highly sensitive and specific digoxin aptasensor. RSC Adv 2015. [DOI: 10.1039/c5ra09402j] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fabrication steps of digoxin aptasensor. The DPVs are for accumulated MB at FTO/GNPs/Ap, before (a) and after (b) incubation with digoxin.
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Affiliation(s)
- H. Bagheri
- Chemical Injuries Research Center
- Baqiyatallah University of Medical Sciences
- Tehran
- Iran
| | - R. P. Talemi
- Faculty of Chemistry
- Kharazmi University
- Tehran
- Iran
| | - A. Afkhami
- Faculty of Chemistry
- Bu-Ali Sina University
- Hamedan
- Iran
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18
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Lin PC, Lin S, Wang PC, Sridhar R. Techniques for physicochemical characterization of nanomaterials. Biotechnol Adv 2014; 32:711-26. [PMID: 24252561 PMCID: PMC4024087 DOI: 10.1016/j.biotechadv.2013.11.006] [Citation(s) in RCA: 245] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Revised: 11/05/2013] [Accepted: 11/12/2013] [Indexed: 12/12/2022]
Abstract
Advances in nanotechnology have opened up a new era of diagnosis, prevention and treatment of diseases and traumatic injuries. Nanomaterials, including those with potential for clinical applications, possess novel physicochemical properties that have an impact on their physiological interactions, from the molecular level to the systemic level. There is a lack of standardized methodologies or regulatory protocols for detection or characterization of nanomaterials. This review summarizes the techniques that are commonly used to study the size, shape, surface properties, composition, purity and stability of nanomaterials, along with their advantages and disadvantages. At present there are no FDA guidelines that have been developed specifically for nanomaterial based formulations for diagnostic or therapeutic use. There is an urgent need for standardized protocols and procedures for the characterization of nanoparticles, especially those that are intended for use as theranostics.
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MESH Headings
- Chemistry, Physical/methods
- Circular Dichroism
- Contrast Media/chemistry
- Humans
- Light
- Magnetic Resonance Spectroscopy
- Mass Spectrometry
- Microscopy, Atomic Force
- Microscopy, Electron, Scanning
- Microscopy, Electron, Transmission
- Microscopy, Scanning Tunneling
- Molecular Imaging/methods
- Nanomedicine/methods
- Nanoparticles/chemistry
- Nanostructures/chemistry
- Nanotechnology/methods
- Nanotechnology/trends
- Scattering, Radiation
- Spectrometry, Fluorescence
- Spectrophotometry, Infrared
- Spectrum Analysis, Raman
- Surface Properties
- Technology, Pharmaceutical/methods
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Affiliation(s)
- Ping-Chang Lin
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Stephen Lin
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Paul C Wang
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
| | - Rajagopalan Sridhar
- Department of Radiation Oncology, Howard University, Washington, DC 20060, USA.
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19
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20
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da Silva MG, Nunes ÁM, Meneghetti SM, Meneghetti MR. New aspects of gold nanorod formation via seed-mediated method. CR CHIM 2013. [DOI: 10.1016/j.crci.2013.01.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Wang JH, Wang B, Liu Q, Li Q, Huang H, Song L, Sun TY, Wang H, Yu XF, Li C, Chu PK. Bimodal optical diagnostics of oral cancer based on Rose Bengal conjugated gold nanorod platform. Biomaterials 2013; 34:4274-83. [PMID: 23489924 DOI: 10.1016/j.biomaterials.2013.02.012] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 02/06/2013] [Indexed: 01/20/2023]
Abstract
Early detection of cancer often requires time consuming protocols and expensive instrumentation. To address these limitations, a Rose Bengal conjugated gold nanorod (RB-GNR) platform is developed for optical detection of cancer cells. The GNRs are modified by poly(allylamine hydrochloride) and conjugated with RB molecules to produce RB-GNRs which exhibit strong optical absorption in the near-infrared (NIR) region, good stability in aqueous solution, low cytotoxicity, and high specificity to oral cancer cells. The label-free sensing assay utilizes RB-GNRs as the sensing probe and by monitoring the aggregation-induced red-shift in the NIR absorption wavelength, specific and quantitative analysis of the oral cancer cell lysate is accomplished down to a detection limit of 2000 cells/mL. By employing the RB-GNRs as an imaging probe, an imaging assay is established on a home-made NIR absorption imaging system. Based on the NIR absorption by the RB-GNRs specifically conjugated with the oral cancer cells, multi-channel, rapid and quantitative detection of oral cancer cells is demonstrated. The high sensitivity and specificity of the RB-GNR platform as demonstrated by the two complementary assays provide non-invasive optical diagnostics of oral cancer cells enabling convenient screening and monitoring.
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Affiliation(s)
- Jia-Hong Wang
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
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22
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Toh YR, Yu P, Wen X, Tang J, Hsieh TS. Induced pH-dependent shift by local surface plasmon resonance in functionalized gold nanorods. NANOSCALE RESEARCH LETTERS 2013; 8:103. [PMID: 23432999 PMCID: PMC3599965 DOI: 10.1186/1556-276x-8-103] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 01/15/2013] [Indexed: 05/17/2023]
Abstract
Localized surface plasmon resonance (LSPR) spectroscopy of metallic nanoparticles is a powerful tool for chemical and biological sensing experiments. In this study, we observed LSPR shifts of 11-mercaptoundecanoic acid modified gold nanorods (GNR-MUA) for the pH range of 6.41 to 8.88. We proposed a mechanism involving changes of the dipole moment after protonation/deprotonation carboxylic groups of 11-mercaptoundecanoic acid (MUA) which plays an important role by modulating LSPR around the functionalized GNR. Such a stable and easily prepared GNR-MUA has potential to become one of the most efficient and promising pH nanosensors to study intra- or extra-cellular pH in a wide range of chemical or biological systems.
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Affiliation(s)
- Yon-Rui Toh
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan
| | - Pyng Yu
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan
| | - Xiaoming Wen
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan
| | - Jau Tang
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan
| | - Tao-shih Hsieh
- Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan
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23
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Fedorov RG, Mandler D. Local deposition of anisotropic nanoparticles using scanning electrochemical microscopy (SECM). Phys Chem Chem Phys 2013; 15:2725-32. [DOI: 10.1039/c2cp42823g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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24
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Chen X, Lawrence J, Parelkar S, Emrick T. Novel Zwitterionic Copolymers with Dihydrolipoic Acid: Synthesis and Preparation of Nonfouling Nanorods. Macromolecules 2012. [DOI: 10.1021/ma301288m] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiangji Chen
- Department of Polymer Science and
Engineering, University of Massachusetts, Amherst, Massachusetts
01003, United States
| | - Jimmy Lawrence
- Department of Polymer Science and
Engineering, University of Massachusetts, Amherst, Massachusetts
01003, United States
| | - Sangram Parelkar
- Department of Polymer Science and
Engineering, University of Massachusetts, Amherst, Massachusetts
01003, United States
| | - Todd Emrick
- Department of Polymer Science and
Engineering, University of Massachusetts, Amherst, Massachusetts
01003, United States
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25
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Abstract
We fabricated localized surface plasmon resonance enhanced UV photodetectors on MOCVD grown semi-insulating GaN. Plasmonic resonance in the UV region was attained using 36 nm diameter Al nanoparticles. Extinction spectra of the nanoparticles were measured through spectral transmission measurements. A resonant extinction peak around 300 nm was obtained with Al nanoparticles. These particles gave rise to enhanced absorption in GaN at 340 nm. Spectral responsivity measurements revealed an enhancement factor of 1.5. These results provided experimental verification for obtaining field enhancement by using Al nanoparticles on GaN.
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Affiliation(s)
- Serkan Butun
- Nanotechnology Research Center, Bilkent University, Bilkent, Ankara, Turkey.
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26
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Xiao Q, Gao H, Lu C, Yuan Q. Gold nanoparticle-based optical probes for sensing aminothiols. Trends Analyt Chem 2012. [DOI: 10.1016/j.trac.2012.07.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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27
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Abstract
Imaging for diagnostics or for evaluating the efficacy of a particular drug constitutes a key challenge, and a topical area of research in nanomedicine. There has been a tremendous effort devoted to the evaluation of a variety of contrast agents, and gold nanomaterials due to their inherent and geometrically induced optical properties, have offered significant potential for in vivo imaging. The gold based nanostructures that are most commonly employed for biological imaging include nano-spheres, -rods, -shells, -cages and -stars. This feature article provides an overview of the current state of research in utilizing these gold nano-architectures in imaging, with particular emphasis on modalities such as two-photon luminescence, computed tomography, optical coherence tomography, near infrared and photoacoustic imaging.
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Affiliation(s)
- Vanessa W K Ng
- Department of Chemistry, McGill University, 801 Sherbrooke St. W., Montréal, Canada.
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28
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Considerations on the application of miniaturized sample preparation approaches for the analysis of organic compounds in environmental matrices. OPEN CHEM 2012. [DOI: 10.2478/s11532-011-0114-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractThe miniaturization and improvement of sample preparation is a challenge that has been fulfilled up to a point in many fields of analytical chemistry. Particularly, the hyphenation of microextraction with advanced analytical techniques has allowed the monitoring of target analytes in a vast variety of environmental samples. Several benefits can be obtained when miniaturized techniques such as solid-phase microextraction (SPME) or liquid-phase microextraction (LPME) are applied, specifically, their easiness, rapidity and capability to separate and pre-concentrate target analytes with a negligible consumption of organic solvents. In spite of the great acceptance that these green sample preparation techniques have in environmental research, their full implementation has not been achieved or even attempted in some relevant environmental matrices. In this work, a critical review of the applications of LPME and SPME techniques to isolate and pre-concentrate traces of organic pollutants is provided. In addition, the influence of the environmental matrix on the effectiveness of LPME and SPME for isolating the target organic pollutants is addressed. Finally, unsolved issues that may hinder the application of these techniques for the extraction of dissolved organic matter from environmental samples and some suggestions for developing novel and less selective enrichment and isolation procedures for natural organic matter on the basis of SPME and LPME are included.
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29
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Microfluidic strategies applied to biomarker discovery and validation for multivariate diagnostics. Bioanalysis 2012; 3:2233-51. [PMID: 21985417 DOI: 10.4155/bio.11.224] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Complex diseases are caused by combinatorial genetic, environmental and lifestyle factors. The emergence of multibiomarker tests to define these diseases and to identify the early, presymptomatic stages offers several advantages to the conventional use of single marker tests. The development of multibiomarker protein-based tests remains constrained by technological and operational limitations in assaying hundreds to thousands of proteins in thousands of samples. In order to develop a multibiomarker test that stratifies risk for Type 2 diabetes, we took a candidate-driven immunoassay approach utilizing a microfluidics platform to analyze 89 candidate proteins in thousands of samples, which allowed us to move from discovery to a commercial test in 2 years. Future multibiomarker test development will be enhanced by advancements in the number of proteins that can be analyzed, analytical sensitivity and throughput, and sample volume requirements, all of which depend on the further advancement of microfluidics, detection technologies and affinity-based reagents.
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Malecka K, Grabowska I, Radecki J, Stachyra A, Góra-Sochacka A, Sirko A, Radecka H. Voltammetric Detection of a Specific DNA Sequence of Avian Influenza Virus H5N1 Using HS-ssDNA Probe Deposited onto Gold Electrode. ELECTROANAL 2012. [DOI: 10.1002/elan.201100566] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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31
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Sapsford KE, Tyner KM, Dair BJ, Deschamps JR, Medintz IL. Analyzing nanomaterial bioconjugates: a review of current and emerging purification and characterization techniques. Anal Chem 2011; 83:4453-88. [PMID: 21545140 DOI: 10.1021/ac200853a] [Citation(s) in RCA: 278] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kim E Sapsford
- Division of Biology, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, Maryland 20993, USA.
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