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Xie C, Xu F, Huang X, Dong C, Ren J. Single gold nanoparticles counter: an ultrasensitive detection platform for one-step homogeneous immunoassays and DNA hybridization assays. J Am Chem Soc 2009; 131:12763-70. [PMID: 19678640 DOI: 10.1021/ja903873n] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this paper, we present for the first time a single gold nanoparticle counter (SGNPC) in solution based on the photon bursting in a highly focused laser beam (less than 1 fL) due to the plasmon resonance scattering and Brownian motion of gold nanoparticles (GNPs). The photon burst intensity of single 36 nm GNPs is several tens to hundreds times stronger than that of quantum dots (QDs) and organic dyes. The relationship between the photon burst counts and GNPs concentration shows an excellent linearity. The linear range is over 4 orders of magnitude, and the detection limit of GNPs (36 nm) is 17 fM. On the basis of this single nanoparticle technique, we developed an ultrasensitive and highly selective detection platform for homogeneous immunoassay and DNA hybridization assays using GNPs as probes, which were 2-5 orders of magnitude more sensitive than current homogeneous methods. We used this technology to construct homogeneous sandwich immunoassays for cancer biomarkers, such as carcinoembryonic antigen (CEA) and alpha fetal protein (AFP), and aptamer recognition for thrombin. The detection limits are 130 fM for CEA, 714 fM for AFP and 2.72 pM for thrombin. Our method was successfully applied for direct determination of CEA, AFP and thrombin levels in sera from healthy subjects and cancer patients. In homogeneous DNA hybridization detection, we chose methylenetetrahydrofolate reductase (MTHFR) gene as a target. This assay successfully distinguished DNA sequences with single base mismatches, and the detection limits for the target were at 1 fM level.
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Affiliation(s)
- Chao Xie
- College of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, PR China
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52
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Sun W, Wang G, Fang N, Yeung ES. Wavelength-Dependent Differential Interference Contrast Microscopy: Selectively Imaging Nanoparticle Probes in Live Cells. Anal Chem 2009; 81:9203-8. [DOI: 10.1021/ac901623b] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Wei Sun
- Ames Laboratory, U.S. Department of Energy, and Department of Chemistry, Iowa State University, Ames, Iowa, 50011
| | - Gufeng Wang
- Ames Laboratory, U.S. Department of Energy, and Department of Chemistry, Iowa State University, Ames, Iowa, 50011
| | - Ning Fang
- Ames Laboratory, U.S. Department of Energy, and Department of Chemistry, Iowa State University, Ames, Iowa, 50011
| | - Edward S. Yeung
- Ames Laboratory, U.S. Department of Energy, and Department of Chemistry, Iowa State University, Ames, Iowa, 50011
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53
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Bao F, Yao JL, Gu RA. Synthesis of magnetic Fe2O3/Au core/shell nanoparticles for bioseparation and immunoassay based on surface-enhanced Raman spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:10782-7. [PMID: 19552373 DOI: 10.1021/la901337r] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Magnetic Fe2O3/Au core/shell nanoparticles can be particularly used in biological separation, but the development of an appropriate technique including a production process for higher efficient separation and the subsequent immunoassay for lower level still represent a great challenge. In this article, Fe2O3/Au core/shell nanoparticles with different Au ratios were prepared by reducing HAuCl4 on the surface of gamma-Fe2O3 nanoparticles. Scanning electron microscopy (SEM) images and surface-enhanced Raman spectroscopy (SERS) spectra clearly show that the surfaces of Fe2O3 nanoparticles were covered by Au. SERS signals of pyridine (Py) have been obtained on the Fe2O3/Au nanoparticles, and it has been found that the SERS intensity enhanced with the increase of iterative additions of HAuCl4. The antigens in test solution have been effectively separated by the magnetic Fe2O3/Au core/shell nanoparticles, and subsequent rapid detection was examined by immunoassay analysis based on SERS. The result demonstrates that the magnetic bioseparation program used by this magnetic Fe2O3/Au core/shell nanoparticles could separate almost all of the antigens in test solution. The ease of operation and good separation efficiency of this effective method has shown a potential application for magnetic Fe2O3/Au core/shell nanoparticles in bioseparation.
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Affiliation(s)
- Fang Bao
- Department of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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55
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Sánchez-Martínez ML, Aguilar-Caballos MP, Gómez-Hens A. Homogeneous immunoassay for soy protein determination in food samples using gold nanoparticles as labels and light scattering detection. Anal Chim Acta 2009; 636:58-62. [PMID: 19231356 DOI: 10.1016/j.aca.2009.01.043] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Revised: 12/16/2008] [Accepted: 01/15/2009] [Indexed: 11/15/2022]
Abstract
A homogeneous aggregation immunoassay involving the use of gold nanoparticles (AuNPs) and light scattering detection is described for soy protein determination in food samples. AuNPs act as enhancers of the precipitate that appears when the antigen-antibody complex is formed. The AuNPs-antibody conjugate has been synthesized by physical adsorption of polyclonal anti-soy protein antibodies onto the surface of commercial AuNPs with a nominal diameter of 20nm. The direct assay is based on the reaction of the conjugate with soy protein, which reaches the equilibrium in about 10min, and the measurement of the light scattering intensity at 530nm, which is proportional to the analyte concentration. The dynamic range of the calibration graph is 0.2-20microgm L(-1) and the detection limit value is 65ngm L(-1). The precision, expressed as relative standard deviation, has been assayed at two different concentrations, 0.2 and 1microgm L(-1), giving values ranging from 4.7 to 5.9%. The interference of other proteins has been assayed. The usefulness of this method has been shown by its application to the analysis of fruit juice and "nonmilk yoghourt" samples. The results obtained with the proposed method are similar to those obtained by using a commercial ELISA kit, but the assay time is significantly shorter and the detection limit was about 10 times lower. A recovery study has been also performed, giving values in the range of 84.0-119.3%.
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Affiliation(s)
- M L Sánchez-Martínez
- Department of Analytical Chemistry, University of Córdoba, Campus of Rabanales, Marie-Curie Annex Building, 14071 Córdoba, Spain
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56
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Woo MA, Lee SM, Kim G, Baek J, Noh MS, Kim JE, Park SJ, Minai-Tehrani A, Park SC, Seo YT, Kim YK, Lee YS, Jeong DH, Cho MH. Multiplex Immunoassay Using Fluorescent-Surface Enhanced Raman Spectroscopic Dots for the Detection of Bronchioalveolar Stem Cells in Murine Lung. Anal Chem 2008; 81:1008-15. [DOI: 10.1021/ac802037x] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Min-Ah Woo
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Sang-Myung Lee
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Gunsung Kim
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - JongHo Baek
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Mi Suk Noh
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Ji Eun Kim
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Sung Jin Park
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Arash Minai-Tehrani
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Se-Chang Park
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Yeong Tai Seo
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Yong-Kwon Kim
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Yoon-Sik Lee
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Dae Hong Jeong
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
| | - Myung-Haing Cho
- College of Veterinary Medicine and Interdisciplinary Program in Nano-Science and Technology, School of Chemical and Biological Engineering, Department of Chemistry Education, and School of Electrical Engineering and Computer Science, Seoul National University, Seoul 151-742, Korea
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57
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Hu J, Zheng PC, Jiang JH, Shen GL, Yu RQ, Liu GK. Electrostatic Interaction Based Approach to Thrombin Detection by Surface-Enhanced Raman Spectroscopy. Anal Chem 2008; 81:87-93. [DOI: 10.1021/ac801431m] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Juan Hu
- State Key Laboratory of Chem/Biosensing and Chemometrics, Chemistry and Chemical Engineering College, Hunan University, 410082 Changsha, China
| | - Peng-Cheng Zheng
- State Key Laboratory of Chem/Biosensing and Chemometrics, Chemistry and Chemical Engineering College, Hunan University, 410082 Changsha, China
| | - Jian-Hui Jiang
- State Key Laboratory of Chem/Biosensing and Chemometrics, Chemistry and Chemical Engineering College, Hunan University, 410082 Changsha, China
| | - Guo-Li Shen
- State Key Laboratory of Chem/Biosensing and Chemometrics, Chemistry and Chemical Engineering College, Hunan University, 410082 Changsha, China
| | - Ru-Qin Yu
- State Key Laboratory of Chem/Biosensing and Chemometrics, Chemistry and Chemical Engineering College, Hunan University, 410082 Changsha, China
| | - Guo-Kun Liu
- State Key Laboratory of Chem/Biosensing and Chemometrics, Chemistry and Chemical Engineering College, Hunan University, 410082 Changsha, China
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58
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Lv J, Jiang L, Li C, Liu X, Yuan M, Xu J, Zhou W, Song Y, Liu H, Li Y, Zhu D. Large third-order optical nonlinear effects of gold nanoparticles with unusual fluorescence enhancement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8297-8302. [PMID: 18582140 DOI: 10.1021/la801000c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The third-order nonlinear optical properties of two solutions of gold nanoparticles protected by carbazolyldiacetylene derivatives were investigated using the Z-scan technique. Both gold nanoparticle colloid solutions in toluene show unusual fluorescent enhancement and large third-order nonlinear optical properties including nonlinear absorption and refractive effects. When extending the pi-conjugated length of the ligands, the third-order nonlinear properties of composite materials based on gold nanoparticles were enhanced accordingly.
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Affiliation(s)
- Jing Lv
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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