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Lu X, Wang L, Li G, Wang Y, Hao G, Ding Y, Liu M, Fu S, Xu L, Ge N, Ge W. Ratiometric fluorescence platform for the ultrasensitive detection of kanamycin based on split aptamer co-recognition triggers Mg 2+-DNAzyme-driven DNA walker systems. Sci Total Environ 2024; 928:172499. [PMID: 38631645 DOI: 10.1016/j.scitotenv.2024.172499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/08/2024] [Accepted: 04/13/2024] [Indexed: 04/19/2024]
Abstract
In this work, a novel 3D-DNA walker signal amplification strategy was designed to construct a fluorescent aptasensor for the detection of kanamycin (KAN). The aptasensor utilizes split aptamers for the synergistic recognition of KAN. The presence of KAN induces the split aptamers recombination to form the Mg2+-DNAzyme structure, which is activated by Mg2+ to drive the 3D-DNA walker process for cascading signal amplification. Employing gold nanoflowers (AuNFs) as walking substrate material increases the local DNA concentration to enhance the walker efficiency. The prepared fluorescent aptasensor achieved efficient and sensitive detection of KAN with satisfactory results in the concentration range of 1 × 10-8 - 1 × 10-3 μg/kg and the detection limit of 5.63 fg/kg. Meanwhile, the designed fluorescent aptasensor exhibited favorable specificity, anti-interference, storage stability and reproducibility, and verified the feasibility of its application in milk samples. The present work provides an effective tool for the regulation of KAN contamination in animal-derived foods with promising prospects.
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Affiliation(s)
- Xia Lu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Long Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Guowei Li
- Shaanxi Goat Milk Prod Qual Supervis & Inspect Ct, Qual Inspect Dept, Fuping Cty Inspect & Testing Ctr, Fuping 711700, PR China
| | - Yuxin Wang
- Shaanxi Zhongjian Test Technology Co., Ltd, Xi'an, Shaanxi 71000, PR China
| | - Guo Hao
- Shaanxi Goat Milk Prod Qual Supervis & Inspect Ct, Qual Inspect Dept, Fuping Cty Inspect & Testing Ctr, Fuping 711700, PR China
| | - Yi Ding
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Mengjia Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Shangchen Fu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Liqing Xu
- Shandong Institute for Food and Drug Control, Jinan, Shandong 250101,PR China
| | - Na Ge
- Tieling Food Inspection and Testing Center, Tieling, Liaoning 112608, PR China
| | - Wupeng Ge
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
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Chen H, Tian P, Guo J, Sun M, Zhu W, Li Z, Liu Z. Synergistic synthesis of gold nanoflowers as upconversion near-infrared nanoprobe energy acceptor and recognition unit for improved hydrogen sulfide sensing. Talanta 2024; 273:125908. [PMID: 38503119 DOI: 10.1016/j.talanta.2024.125908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 03/03/2024] [Accepted: 03/09/2024] [Indexed: 03/21/2024]
Abstract
A highly sensitive and selective upconversion near-infrared (NIR) fluorescence and colorimetric dual readout hydrogen sulfide (H2S) nanoprobe was constructed based on the excellent NIR fluorescence emission performance of upconversion nanomaterials (UCNPs), the specific recognition effect of synergistically synthesized gold nanoflowers (trypsin-stabled AuNFs (Try-AuNFs)) and the effective NIR fluorescence quenching capability. In this assay, the sensing strategy included three processes. First of all, the synthesized UCNPs can emit 803 nm NIR fluorescence when they were excited by 980 nm excitation light. Secondly, as a result of the principle of fluorescence resonance energy transfer (FRET), Try-AuNFs can effectively quench the NIR fluorescence of UCNPs at 803 nm, which can effectively improve the signal-to-background ratio of nanoprobes, thereby improving the sensitivity of the probes. Thirdly, in the presence of H2S, the Try protective layer on the surface of Try-AuNFs was specifically penetrated, which will subsequently cleave Try-AuNFs via the strong S-Au bond. As such, the NIR fluorescence of UCNPs will be restored, achieving high selectivity and sensitivity detection of H2S. Under optimized conditions, the linear response range of H2S was 0.1-300 μM, and the detection limit was 53 nM. It is worth noting that the Try on the surface of Try-AuNFs via the synergistic effect can increase the steric hindrance of the probe, and this can effectively prevent the interaction between the probe with biothiols (cysteine (Cys), homocysteine (Hcy)) and other natural amino acids (non-thiol-containing) with resultant in the high selectivity regarding the detection of H2S in human serum, which is unlikely to be achieved by AuNFs synthesized by the gold seed method (Se-AuNFs). This work not only provided a new type of UCNPs fluorescence quencher and recognition unit, but also exemplified that the use of the physical properties (steric hindrance) of protein ligands on the surface of nanoflowers can improve the specificity of the probe. This will provide new ideas for the design of other nanoprobes.
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Affiliation(s)
- Hongyu Chen
- Henan Key Laboratory of Rare Earth Functional Materials, International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, Zhoukou 466001, China.
| | - Peipei Tian
- Henan Key Laboratory of Rare Earth Functional Materials, International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, Zhoukou 466001, China
| | - Jiayi Guo
- Henan Key Laboratory of Rare Earth Functional Materials, International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, Zhoukou 466001, China
| | - Manman Sun
- College of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, China.
| | - Wenping Zhu
- Henan Key Laboratory of Rare Earth Functional Materials, International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, Zhoukou 466001, China
| | - Zhendong Li
- Henan Key Laboratory of Rare Earth Functional Materials, International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, Zhoukou 466001, China
| | - Zengchen Liu
- Henan Key Laboratory of Rare Earth Functional Materials, International Joint Research Laboratory for Biomedical Nanomaterials of Henan, Zhoukou Normal University, Zhoukou 466001, China.
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Xie J, Zhang B, Gui X, Ma J, Chu J, Guo Z, Wang W, Qin W, Qin Z, Yao H, Bai J. Planting gold nanoflower for harvesting reproducible SERS substrate. Spectrochim Acta A Mol Biomol Spectrosc 2024; 308:123793. [PMID: 38141506 DOI: 10.1016/j.saa.2023.123793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 11/21/2023] [Accepted: 12/16/2023] [Indexed: 12/25/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is an ultrasensitive analytical method which has been applied in many fields, and the reproducibility of the substrate is important for reliable SERS analysis. In present work, an innovative method inspired by the flower planting process is put forward to acquire gold nanoflower (AuNF) SERS substrate. Three steps (digging holes, sowing the gold nanoseeds and seeds grow into gold nanoflowers) are included in the substrate fabrication process, and the influence of preparing conditions (like reacting time and Na3Au(SO3)2 concentration) on the substrate morphology and SERS performance are investigated. The acquired AuNF substrate not only exhibits good SERS performance but also possesses excellent reproducibility while being used to detect the rhodamine 6G (R6G) molecular. The relative standard deviation (RSD) of Raman signals among substrates acquired in distinct batches (substrate-to-substrate) is as low as 6.67 %. Since the AuNF substrate is prepared by the wet chemistry route based on seed-mediated growth and there are no expensive reagents or complicated process used, the new process to obtain AuNF substrate is cost-effective and easy to scale up.
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Affiliation(s)
- Jianjun Xie
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Baitong Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoyu Gui
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jingyi Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jian Chu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Zaichao Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wentao Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Wei Qin
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhi Qin
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; Advanced Energy Science and Technology Guangdong Laboratory, Huizhou, 516000, China
| | - Huijun Yao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Advanced Energy Science and Technology Guangdong Laboratory, Huizhou, 516000, China.
| | - Jing Bai
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Advanced Energy Science and Technology Guangdong Laboratory, Huizhou, 516000, China.
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Wang C, Han J, Xue D, Gu C, Zeng S, Jiang J, Jiang T, Li X, Wu K. SERS-active immunoassay kit for SARS-CoV‑2 mediated by the cooperative chemical and electromagnetic effects of MXene modified with gold nanowires. Spectrochim Acta A Mol Biomol Spectrosc 2024; 305:123445. [PMID: 37757541 DOI: 10.1016/j.saa.2023.123445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/16/2023] [Accepted: 09/20/2023] [Indexed: 09/29/2023]
Abstract
Surface-enhanced Raman scattering (SERS) technique with high sensitivity, reliable specificity, and rapid recognition ability exhibits attractive promise for the effective fast-monitoring of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Herein, a novel SERS-active immunoassay kit for SARS-CoV-2 nucleocapsid (N) protein was prepared by in-situ growing gold (Au) nanowire forests (NFs) onto Ti3C2Tx, which was then modified onto polymethyl methacrylate (PMMA) matrix and encapsulated into kit. It was noted that the Au nanowires with fibrous structures which vertically anchored on Ti3C2Tx served as perfect channels to promote photo-induced charge transfer. The synergistic action of electromagnetic and chemical effects resulted in an enhancement factor (EF) of 1.27 × 107. Furthermore, the unreliable fluctuation of the enhanced signal was eliminated by using the intrinsic Raman signal of the flexible PMMA platform, achieving an improved correlation coefficient (R2) value from 0.950 to 0.990. Moreover, the as-designed immunoassay kit with both high sensitivity and remedied quantitative ability rendered by the Ti3C2Tx@Au NFs-PMMA composite exhibited a powerful performance in the practical detection of N-protein with concentration low to 5.0 × 10-8 mg/mL.
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Affiliation(s)
- Chucheng Wang
- School of Materials Science and Chemical Engineering, School of Physical Science and Technology, The Research Institute of Advanced Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China
| | - Junshan Han
- School of Materials Science and Chemical Engineering, School of Physical Science and Technology, The Research Institute of Advanced Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China
| | - Danni Xue
- School of Materials Science and Chemical Engineering, School of Physical Science and Technology, The Research Institute of Advanced Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China
| | - Chenjie Gu
- School of Materials Science and Chemical Engineering, School of Physical Science and Technology, The Research Institute of Advanced Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China
| | - Shuwen Zeng
- XLIM Research Institute, UMR 7252 CNRS/University of Limoges, 87060 Limoges, France
| | - Junhui Jiang
- Translational Research Laboratory for Urology, Department of Urology, The First Affiliated Hospital of Ningbo University, Ningbo University, Ningbo 315010, Zhejiang, PR China
| | - Tao Jiang
- School of Materials Science and Chemical Engineering, School of Physical Science and Technology, The Research Institute of Advanced Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China.
| | - Xing Li
- School of Materials Science and Chemical Engineering, School of Physical Science and Technology, The Research Institute of Advanced Technology, Ningbo University, Ningbo 315211, Zhejiang, PR China.
| | - Kerong Wu
- Translational Research Laboratory for Urology, Department of Urology, The First Affiliated Hospital of Ningbo University, Ningbo University, Ningbo 315010, Zhejiang, PR China.
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Song Z, Wang X, Chen P, Wang Z, Ma X. A gold nanoflower based dual mode aptasensor for aflatoxin B 1 detection using SERS and fluorescence effect simultaneously. Spectrochim Acta A Mol Biomol Spectrosc 2023; 301:122963. [PMID: 37302200 DOI: 10.1016/j.saa.2023.122963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/27/2023] [Accepted: 05/30/2023] [Indexed: 06/13/2023]
Abstract
Aflatoxin B1 (AFB1) is usually the major aflatoxin produced by toxigenic strains and has been identified the most potent natural carcinogen. Here, a SERS/fluorescence dual-mode nanosensor has been designed while gold nanoflowers (AuNFs) was used as substrate for the detection of AFB1. AuNFs exhibited excellent SERS enhancement effect as well as the good fluorescence quenching effect which made the dual signal detection possible. First, the surface of AuNFs was modified with AFB1 aptamer via Au-SH group. Then, the complementary sequence functionalized with Cy5 (the signal molecule) was attached to AuNFs based on the base complementary pairing principle. On this case, Cy5 was close to AuNFs, the SERS intensity was greatly enhanced and the fluorescence intensity was quenched. After incubation with AFB1, the aptamer was preferentially combined to its target AFB1. Thus, the complementary sequence detached from AuNFs which caused the SERS intensity of Cy5 decreased while its fluorescence effect recovered. Then, the quantitative detection was realized with two optical properties. The LOD was calculated to be 0.03 ng/mL. It was a convenient and fast detection method which expanded the application of nanomaterials based multi-signal simultaneous detection.
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Affiliation(s)
- Zhiyi Song
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Collaborative innovation center of food safety and quality control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Xinyi Wang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Collaborative innovation center of food safety and quality control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Peifang Chen
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Collaborative innovation center of food safety and quality control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Collaborative innovation center of food safety and quality control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Xiaoyuan Ma
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China; Collaborative innovation center of food safety and quality control in Jiangsu Province, Jiangnan University, Wuxi 214122, China.
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Li D, Liang R, Fan A. Ultrasensitive colorimetric detection of tetracyclines based on in-situ growth of gold nanoflowers. ANAL SCI 2023:10.1007/s44211-023-00332-6. [PMID: 37017813 DOI: 10.1007/s44211-023-00332-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 03/27/2023] [Indexed: 04/06/2023]
Abstract
A colorimetric method based on in-situ generation of gold nanoflowers for the detection of tetracyclines (TCs) was proposed. We found that gold nanoflowers could be formed in the HAuCl4-NH2OH redox reaction directly without the addition of small-sized gold nanoparticles (Au NPs) as seeds when an alkaline borax buffer solution was employed as the reaction medium. Interestingly, the shape and size of the generated gold nanoflowers were regulated with TC. Briefly, large flower-like gold nanoparticles were formed with a low concentration of TC while small spherical gold nanoparticles were generated with a high concentration of TC. The generated gold nanoflowers exhibited different surface plasmon absorption (SPR) properties. Thus, a simple and rapid colorimetric method was established for the detection of TC antibiotics. This method exhibited high sensitivity for the detection of TC, oxytetracycline (OTC), and doxycycline (DC) with detection limits of 2.23 nM, 1.19 nM, and 5.81 nM, respectively. The proposed colorimetric method was applied to the determination of TC in both milk samples and water samples.
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Affiliation(s)
- Dongmei Li
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Rushi Liang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Aiping Fan
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, People's Republic of China.
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Qiao M, Liu Y, Wei M. Dual-signal output fluorescent aptasensor based on DNA programmability and gold nanoflowers for multiple mycotoxins detection. Anal Bioanal Chem 2023; 415:277-288. [PMID: 36376716 DOI: 10.1007/s00216-022-04403-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/04/2022] [Accepted: 10/25/2022] [Indexed: 11/16/2022]
Abstract
Herein, a dual-signal output fluorescent aptamer sensor was constructed for the simultaneous detection of aflatoxin B1 (AFB1) and ochratoxin A (OTA) using the specific recognition ability of aptamers and the programmability of DNA. A functional capture probe (cDNA) was designed with the black hole quenching motif BHQ1 labeled at the 5' end and biotin (bio) labeled at the 3' end. The fluorescent dye Cy3-labeled aflatoxin B1 aptamer (AFB1-Apt) and the carboxyfluorescein FAM-labeled ochratoxin A aptamer (OTA-Apt) were used as two fluorescent probes. The cDNA is anchored to the quenching material gold nanoflowers (AuNFs) by the action of streptavidin (SA) and biotin. Its ends can be complementarily paired with two fluorescent probe bases to form a double-stranded structure. The fluorescence of Cy3 was quenched by AuNFs, and the fluorescence of FAM was quenched by BHQ1 through the fluorescence energy resonance transfer (FRET) effect, forming a fluorescence quenching system. Due to the high affinity of the target and the aptamer, the structure of the aptamer probe changes and detaches from the sensor when AFB1 and OTA are present, resulting in enhanced fluorescence. Under optimal conditions, the linear range of AFB1 was 0.1-100 ng/mL (R2 = 0.996), the limit of detection (LOD) was as low as 0.014 ng/mL, and the limit of quantification (LOQ) was 0.046 ng/mL. The linear range of OTA was 0.1-100 ng/mL (R2 = 0.995), the limit of detection (LOD) was as low as 0.027 ng/mL, and the limit of quantification (LOQ) was 0.089 ng/mL. The sensor had high accuracy in detecting both AFB1 and OTA in real sample analysis. The results of the t test show that there is no significant difference between the results of this study and the high-performance liquid phase (HPLC) method, indicating that the prepared sensor can be used as a potential platform for multiple mycotoxins detection.
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Affiliation(s)
- Mengxiang Qiao
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou, 450001, People's Republic of China
| | - Yong Liu
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, People's Republic of China
| | - Min Wei
- College of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou, 450001, People's Republic of China.
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Ling S, Dong M, Xu Y, Xu A, Lin J, Lin M, Zhao Q, Wang S. Development of sensitive and portable immunosensors based on signal amplification probes for monitoring the mercury(II) ions. Biosens Bioelectron 2022; 217:114676. [PMID: 36126556 DOI: 10.1016/j.bios.2022.114676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/18/2022] [Accepted: 08/28/2022] [Indexed: 11/02/2022]
Abstract
Mercury ion (Hg2+) as a major environmental pollutant threatens human health even at very low concentrations, so it is essential to monitor mercury residues in food. In this study, Hg2+ was conjugated with protein carrier using 1-(4-Isothiocyanobenzyl) ethylenediamine N, N, N', N'-tetraacetic acid (ITCBE) as a bifunctional chelator. 7A1 monoclonal antibody (mAb) against Hg2+-ITCBE with high affinity (7.3 × 109 L/moL) and good specificity was obtained by cell fusion technology and performed to establish immunosensors. Immunochromatographic test strip using colloidal gold nanoparticles (AuNP with an average diameter of 18 nm) as signal reporter showed low sensitivity. Signal amplification probes including larger multi-branched gold nanoflowers (AuNF) and latex microspheres (LM) were employed to enhance the sensitivity of immunosensors. The visible limit of detection (vLOD) of the AuNF- and LM-based strip were determined to be 50 ng/mL and 25 ng/mL respectively, showing more sensitive than that of AuNP-based strip (200 ng/mL). Quantitative analysis showed that AuNF-based strip exhibited lower quantitative limit of detection (qLOD) (0.44 ng/mL) which was 20-fold lower than that of AuNP-based strip (8.92 ng/mL) for determination of Hg2+, and LM-based strip (0.49 ng/mL) was 18 times as sensitive as AuNP-based strip. In summary, the developed immunosensors using AuNF and LM as signal amplification probes exhibited excellent sensitivity and provided portable, on-site detection for Hg2+.
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Li X, Liu X, Liu Y, Gao R, Wu X, Gao X. Highly sensitive detection of dopamine based on gold nanoflowers enhanced-Tb(III) fluorescence. Talanta 2022; 249:123700. [PMID: 35751922 DOI: 10.1016/j.talanta.2022.123700] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/11/2022] [Accepted: 06/15/2022] [Indexed: 12/20/2022]
Abstract
We developed a trace level detection method for dopamine (DA) based on the metal-enhanced fluorescence (MEF) effect of gold nanoflowers (AuNFs). AuNFs prepared were excellent enhancement fluorescence substrates due to their unique morphology with rich edges and sharp quoins. DA was the target analyte and also as a bridge reagent that could regulate the distance between AuNFs and Tb3+. The characteristic fluorescence of Tb3+ was enhanced significantly through the synergistic effect between the luminescence sensitized by DA and the MEF caused by AuNFs. Under the optimum experimental conditions, the fluorescence intensity of Tb3+ at 545 nm demonstrated very significant sensing ability against DA concentration and showed a good linear relationship in the range of 0.80-300 nM and the limit of detection was 0.21 nM (S/N = 3). The proposed method was also validated in serum samples and the dopamine hydrochloride injection samples with satisfactory results.
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Affiliation(s)
- XueQin Li
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, PR China
| | - Xingcen Liu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, PR China
| | - Yujie Liu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, PR China
| | - Ran Gao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, PR China
| | - Xia Wu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, PR China.
| | - Xibao Gao
- School of Public Health, Shandong University, Jinan, 250012, PR China
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Yu F, Huang H, Shi J, Liang A, Jiang Z. A new gold nanoflower sol SERS method for trace iodine ion based on catalytic amplification. Spectrochim Acta A Mol Biomol Spectrosc 2021; 255:119738. [PMID: 33812234 DOI: 10.1016/j.saa.2021.119738] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/11/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
As one of the essential trace elements in metabolism, iodine is crucial to maintain the normal physiological functions. Therefore, based on health and environmental protection, it is very important to realize sensitive detection of iodide ion. Herein, we developed a simple, rapid and sensitive method for the determination of iodide ion. Trypsin was used as an ideal template for the synthesis of gold nanoflower sol (AuNFs) with anisotropic surface structure and good stability. It exhibits highly active surface enhanced Raman scattering (SERS) effect and can be used as facile SERS sol substrate. The TMBox generated by the catalytic oxidation reaction of TMB-chloramine T-iodide ion is used as the SERS probe. The enhanced SERS signal intensity is linearly related to the iodide ion with high sensitivity. In addition, TMB has fluorescence effect, and the colored TMBox can produce RRS signal due to polymerization. Based on this, a quad-mode detection method of SERS, RRS, fluorescence and colorimetry for quantitative detection of trace iodide ions was established, and this method can be applied to the detection of iodide ions in natural water and drinking water.
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Affiliation(s)
- Faxin Yu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China
| | - Hanbing Huang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China
| | - Jinling Shi
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China
| | - Aihui Liang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China.
| | - Zhiliang Jiang
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin 541004, China; Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin 541004, China.
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11
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Hu Q, Yang J, Zheng Z, Ding Y, Chen Y, Gao W. In situ H 2O 2 generation with gold nanoflowers as the coreactant accelerator for enzyme-free electrochemiluminescent immunosensing. Biosens Bioelectron 2019; 143:111627. [PMID: 31476601 DOI: 10.1016/j.bios.2019.111627] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 08/16/2019] [Accepted: 08/21/2019] [Indexed: 12/20/2022]
Abstract
In traditional electrochemiluminescence (ECL) analysis, gold nanomaterials are commonly used as a tool for signal amplification and linking antibodies due to their good electrical conductivity and biocompatibility. Here, we found that multitipped gold nanoparticles-gold nanoflowers (AuNFs) as coreactant accelerator have good catalytic activity for the reduction of dissolved oxygen (O2) to hydrogen peroxide (H2O2) using tris (hydroxymethyl) aminomethane (Tris) as electron donor. Based on this, a new enzyme-free and label-free ECL immunosensor have been constructed for the detection of α-fetoprotein (AFP). In this system, due to the unique geometric and spatial effects of AuNFs, the dissolved O2 as endogenous coreactant was catalyzed by AuNFs to produce H2O2 using Tris as an electron donor. The in situ generated H2O2 can more efficiently produce various electrogenerated reactive oxygen species (ROSs) as the important intermediates on the electrode surface. Then, oxidation of luminol reacts with ROSs significantly amplifies the luminol ECL signal. Under optimal experimental conditions, the proposed ECL immunosensor was able to detect the AFP concentration from 0.01 to 100 ng mL-1, with a low detection limit of 3.4 pg mL-1 (S/N = 3). In addition, the prepared ITO-based sensor is similar to a micro-test chip and convenient to use, thus making it suitable for clinical use as a disposable device in point-of-care tests (POCTs).
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Affiliation(s)
- Qiuyu Hu
- Department of Chemistry and Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, PR China
| | - Jianying Yang
- National Detergents and Cosmetics Products Quality Supervision and Inspection Center (Guangdong), Shantou, Guangdong, 515041, PR China
| | - Zengyao Zheng
- National Detergents and Cosmetics Products Quality Supervision and Inspection Center (Guangdong), Shantou, Guangdong, 515041, PR China
| | - Yupei Ding
- Department of Chemistry and Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, PR China
| | - Yaowen Chen
- Analysis & Testing Center, Shantou University, Shantou, Guangdong, 515063, PR China
| | - Wenhua Gao
- Department of Chemistry and Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, PR China; Analysis & Testing Center, Shantou University, Shantou, Guangdong, 515063, PR China.
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12
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Petrakova AV, Urusov AE, Zherdev AV, Dzantiev BB. Gold nanoparticles of different shape for bicolor lateral flow test. Anal Biochem 2018; 568:7-13. [PMID: 30582897 DOI: 10.1016/j.ab.2018.12.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 11/26/2018] [Accepted: 12/18/2018] [Indexed: 11/16/2022]
Abstract
Spherical gold nanoparticles are the most commonly used marker in lateral flow assays. However, the widespread practice of using identical coloration for the test and control zones of test strips can lead to erroneous interpretations of the assay's results. We propose an immunochromatographic test strip with lines of different colors. For this purpose, gold nanoparticles of different shapes were used, namely blue nanoflowers in the test zone and red gold nanospheres in the control zone. A detailed synthesis procedure for nanoparticles and their conjugates is considered and design parameters for optimal results are described. For the first time, nanoparticles of different shapes have been combined in the test strip with indirect labeling of specific antibodies (via their interaction with labeled secondary antibodies). Using the T-2 toxin (T2T) as an example, an instrumental detection limit of 30 pg/ml and a working range 0.06-0.9 ng/mL were achieved in an analysis of water-organic corn extracts.
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Affiliation(s)
- Alina V Petrakova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky prospect 33, 119071, Moscow, Russia
| | - Alexandr E Urusov
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky prospect 33, 119071, Moscow, Russia
| | - Anatoly V Zherdev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky prospect 33, 119071, Moscow, Russia
| | - Boris B Dzantiev
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky prospect 33, 119071, Moscow, Russia.
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13
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Yin T, Li Y, Bian K, Zhu R, Liu Z, Niu K, Liu H, Gao Z, Gao D. Self-assembly synthesis of vapreotide‑gold hybrid nanoflower for photothermal antitumor activity. Mater Sci Eng C Mater Biol Appl 2018; 93:716-723. [PMID: 30274105 DOI: 10.1016/j.msec.2018.08.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 07/14/2018] [Accepted: 08/06/2018] [Indexed: 12/15/2022]
Abstract
Based on the self-assembly properties of vapreotide acetate (Vap), one kind of novel vapreotide acetate‑gold nanoflowers (Vap-AuNFs) was fabricated for the first time by biomimetic mineralization method using Vap as a template. The Vap-AuNFs possessed anisotropic structure with a large absorption cross-section, which were face-centered cubic crystalline, exhibiting a remarkable monodisperse, narrow size (154 nm) distribution and good stability in aqueous solution. The apparent anisotropy of the gold nanostructure with high molar extinction coefficient can cause significantly higher plasmon absorption of Vap-AuNFs in the near infrared (NIR) region compared with Au nanoparticles (AuNPs), so the nanocomplex can induce remarkably enhanced photothermal conversion efficiency under NIR light irradiation. Breathtakingly, Vap-AuNFs exhibited superior biocompatibilities compared to AuNPs, as well as enhanced Hela cells lethality under NIR irradiation. This novel method was simple, low cost and green for the design and preparation of anisotropic gold nanoflowers with outstanding NIR laser-induced local hyperthermia, highlighting their potential applications in biomedical fields.
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Affiliation(s)
- Tian Yin
- Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No.438 Hebei Street, Qinhuangdao, China 066004; Qinhuangdao Changsheng Agricultural Science and Technology Development Co., Ltd, No. 12, Donghai Road, Qinhuangdao 066004, China
| | - Yanji Li
- Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No.438 Hebei Street, Qinhuangdao, China 066004
| | - Kexin Bian
- Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No.438 Hebei Street, Qinhuangdao, China 066004
| | - Ruiyan Zhu
- Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No.438 Hebei Street, Qinhuangdao, China 066004; Qinhuangdao Changsheng Agricultural Science and Technology Development Co., Ltd, No. 12, Donghai Road, Qinhuangdao 066004, China
| | - Zhiwei Liu
- Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No.438 Hebei Street, Qinhuangdao, China 066004
| | - Kang Niu
- Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No.438 Hebei Street, Qinhuangdao, China 066004
| | - Huan Liu
- Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No.438 Hebei Street, Qinhuangdao, China 066004
| | - Zhengrong Gao
- Beijing Ditan Hospital Capital Medical University, No.8 Jingshun East Road, Chaoyang District, Beijing 100015, China
| | - Dawei Gao
- Chemical Key Lab of Hebei Province, Department of Biological Engineering, Yanshan University, No.438 Hebei Street, Qinhuangdao, China 066004; Qinhuangdao Changsheng Agricultural Science and Technology Development Co., Ltd, No. 12, Donghai Road, Qinhuangdao 066004, China.
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14
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Ahn S, Singh P, Jang M, Kim YJ, Castro-Aceituno V, Simu SY, Kim YJ, Yang DC. Gold nanoflowers synthesized using Acanthopanacis cortex extract inhibit inflammatory mediators in LPS-induced RAW264.7 macrophages via NF-κB and AP-1 pathways. Colloids Surf B Biointerfaces 2017; 162:398-404. [PMID: 29245117 DOI: 10.1016/j.colsurfb.2017.11.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We reported the rapid synthesis (<8s) of gold nanoparticles at room temperature using Acanthopanacis cortex extract (A-AuNPs). We characterized the A-AuNPs using several analytical techniques and found that nano-flower type A-AuNPs, which are known to possess a coarse surface with a high surface to volume ratio, conferring these particles with high binding capacity for various biological molecules. After confirming the stability of the nanoparticles, we investigated the anti-inflammatory effect of A-AuNPs in LPS-stimulated RAW264.7 cells. These nanoparticles inhibited LPS-induced iNOS and COX-2 protein as well as gene expression level, along with reduction of NO and PGE2 production. Furthermore, we observed that the A-AuNPs inhibited translocation of NF-κB and AP-1 through phosphorylation of MAPK signaling by western blot analysis. In summary, we synthesized gold nanoflowers in an economical and eco-friendly way using Acanthopanacis cortex extract and the resultant flower-like A-AuNPs had anti-inflammatory activity, highlighting their potential as therapeutic candidates for suppression of inflammatory-mediated diseases.
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Affiliation(s)
- Sungeun Ahn
- Department of Oriental Medicinal Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea; Graduate School of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Priyanka Singh
- Department of Oriental Medicinal Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea; Graduate School of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Mi Jang
- Department of Oriental Medicinal Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Yu-Jin Kim
- Department of Oriental Medicinal Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Verónica Castro-Aceituno
- Department of Oriental Medicinal Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Shakina Yesmin Simu
- Graduate School of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Yeon Ju Kim
- Department of Oriental Medicinal Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea.
| | - Deok-Chun Yang
- Department of Oriental Medicinal Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea; Graduate School of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea.
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Khan MN, Khan TA, Al-Thabaiti SA, Khan Z. Spectrophotometric evidence to the formation of AuCl4-CTA complex and synthesis of gold nano-flowers with tailored surface textures. Spectrochim Acta A Mol Biomol Spectrosc 2015; 149:889-897. [PMID: 26004098 DOI: 10.1016/j.saa.2015.04.088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 04/19/2015] [Accepted: 04/21/2015] [Indexed: 06/04/2023]
Abstract
In this paper we report the UV-visible and transmission electron microscopy (TEM) evidence to the formation of stable yellow-orange colored complex, which is attributed to the formation of ion-pair between sub-aggregates of cetyltrimethylammonium bromide (CTAB) and gold at room temperature. The position of wavelength maxima (λmax) and shape of the spectra strongly depends on the reaction conditions, i.e., [HAuCl4] and [CTAB]. As the reaction proceeds, typical two bands (one peak and one shoulder) at ca. 409 nm and 470 nm appears and the intensities increase with the time. TEM photographs indicate that the gold-CTA complex consist of aggregated nano-flower like gold with particle size range ca. 40-60 nm. N-(4-hydroxyphenyl)ethanamide (paracetamol) was used to the reduction of resulting gold-CTA complex which leads to the formation of beautiful nano-flower, branched-leaves, and bird-plume like AuNPs. Paracetamol concentrations have marked influence on the morphology (shape, size and the size distribution) and nature of the surface resonance plasmon band of AuNPs whereas [CTAB] have no impact on their spectra. Suitable mechanism have been proposed and discussed to the AuNPs formation.
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Affiliation(s)
- Mohammad Naved Khan
- Nanoscience Research Laboratory, Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India
| | - Tabrez Alam Khan
- Nanoscience Research Laboratory, Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India
| | - Shaeel Ahmed Al-Thabaiti
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Zaheer Khan
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
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Nalawade P, Kapoor S. Gold nanoflowers based colorimetric detection of Hg2+ and Pb2+ ions. Spectrochim Acta A Mol Biomol Spectrosc 2013; 116:132-135. [PMID: 23933548 DOI: 10.1016/j.saa.2013.07.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 07/01/2013] [Accepted: 07/16/2013] [Indexed: 06/02/2023]
Abstract
An optical detection method based on the interaction of gold nanoflowers with Hg(2+) and Pb(2+) has been described. After interaction, gold nanoflowers change the color from violet to wine red. The nanoflowers are capable of determining Hg(2+) and Pb(2+) over a dynamic range of 1.0 × 10(-6) and 1.0 × 10(-5)M, respectively. The response time of nanoflowers depends on the concentration of ions. The presence of both Hg(2+) and Pb(2+) ions in the mixture having Au nanoflowers induced color changes of the solution within several seconds even at 1.0 × 10(-6)M. Common metal ions were chosen to investigate their interference in Hg(2+) and Pb(2+) detection, and the concentration of each metal ion studied was 1.0 × 10(-5)M. Other metallic ions could not induce color change even at 1.0 × 10(-5)M. The feasibility of our method to detect Hg(2+) and Pb(2+) ions at high concentration in real water samples was verified. Water samples were from our own laboratory and no pretreatment was made. As the particles are stable they can be used for more than 3 months without observing any major deviation.
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Affiliation(s)
- Pradnya Nalawade
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India
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