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Nazemzadeh N, Miranda CR, Liang Y, Andersson MP. First-Principles Prediction of Amorphous Silica Nanoparticle Surface Charge: Effect of Size, pH, and Ionic Strength. J Phys Chem B 2023; 127:9608-9619. [PMID: 37906160 DOI: 10.1021/acs.jpcb.3c04405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
The quantification of surface charge properties of silica nanoparticles is essential for several applications. To determine these properties, many experimental and theoretical methods have been introduced, which are time-consuming and/or challenging to use. In this study, a first-principles approach is developed to determine the surface charge properties of amorphous silica nanoparticles against the nanoparticle size, pH, and ionic strength without relying on experimental data. An amorphous silica nanoparticle of 1.34 nm diameter is simulated by using integrated molecular dynamics and Monte Carlo methods. A detailed analysis of the nanoparticle structure is provided by analyzing the types of silanol groups on the surface. Moreover, a model is developed to estimate the probability distribution of the surface silanol groups based on the nearest neighbor distances and the diameter of the nanoparticle to determine the number of surface silanols on larger nanoparticles. Thereafter, a computational chemistry approach is used to calculate the acid dissociation constants of the corresponding deprotonation reactions. The calculated constants and the point of zero charge value are in excellent agreement with experiments. The surface charge properties of the nanoparticle with various diameters are then estimated by using a mean-field model at different pH and ionic strength values. The results of the developed model are compared to the Poisson-Boltzmann equation as a reference model. The developed model predictions agree well with the reference model for low and mid-electrolyte concentrations (1 and 10 mM) and small nanoparticles (smaller than 100 nm). However, the developed model seems to qualitatively predict the surface charge properties more accurately than the Poisson-Boltzmann model for high electrolyte concentrations.
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Affiliation(s)
- Nima Nazemzadeh
- Department of Chemical and Biochemical Engineering, Søltofts Plads, Building 228A, Technical University of Denmark, Kongens Lyngby DK-2800, Denmark
| | - Caetano R Miranda
- Institute of Physics, University of São Paulo, P.O. Box 66318, São Paulo 05508-090, SP, Brazil
| | - Yunfeng Liang
- Department of Systems Innovation, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Martin P Andersson
- Center for Integrative Petroleum Research, King Fahd University of Petroleum and Minerals, Dhahran 31261, Kingdom of Saudi Arabia
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Xie KX, Huo RP, Song XL, Liu QL, Jiang Y, Li YH, Dong LL, Cheng JX. Fluorescence enhancement of surface plasmon coupled emission by Au nanobipyramids and its modulation effect on multi-wavelength radiation. Anal Chim Acta 2023; 1271:341460. [PMID: 37328245 DOI: 10.1016/j.aca.2023.341460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/10/2023] [Accepted: 05/30/2023] [Indexed: 06/18/2023]
Abstract
Surface plasmon coupled emission (SPCE), a novel surface-enhanced fluorescence technique, can generate directional and amplified radiation by the intense interaction between fluorophores and surface plasmons (SPs) of metallic nanofilms. For plasmon-based optical systems, the strong interaction between localized and propagating SPs and "hot spot" structures show great potential to significantly improve the electromagnetic (EM) field and modulate optical properties. Au nanobipyramids (NBPs) with two sharp apexes to enhance and restrict the EM field were introduced through electrostatic adsorption to achieve a mediated fluorescence system, and the emission signal enhancement was realized by factors over 60 compared with the normal SPCE. It has been demonstrated that the intense EM field produced by the NBPs assembly is what triggered the unique enhancement of SPCE by Au NBPs, which effectively overcomes the inherent signal quenching of SPCE for ultrathin sample detection. This remarkable enhanced strategy offers the chance to improve the detection sensitivity for plasmon-based biosensing and detection systems, and expand the range of applications for SPCE in bioimaging with more comprehensive and detailed information acquisition. The enhancement efficiency for various emission wavelengths was investigated in light of the wavelength resolution of SPCE, and it was discovered that enhanced emission for multi-wavelength could be successfully detected through the different emission angles due to the angular displacement caused by wavelength change. Benefit from this, the Au NBP modulated SPCE system was employed for multi-wavelength simultaneous enhancement detection under a single collection angle, which could broaden the application of SPCE in simultaneous sensing and imaging for multi-analytes, and expected to be used for high throughput detection of multi-component analysis.
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Affiliation(s)
- Kai-Xin Xie
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong, 030619, China.
| | - Rui-Ping Huo
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong, 030619, China
| | - Xiu-Li Song
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong, 030619, China
| | - Qiao-Ling Liu
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong, 030619, China
| | - Yue Jiang
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong, 030619, China
| | - Yu-Han Li
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong, 030619, China
| | - Lu-Lu Dong
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong, 030619, China
| | - Jia-Xin Cheng
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong, 030619, China
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Xie KX, Li Z, Fang JH, Cao SH, Li YQ. Au-Ag Alloy Nanoshuttle Mediated Surface Plasmon Coupling for Enhanced Fluorescence Imaging. BIOSENSORS 2022; 12:bios12111014. [PMID: 36421131 PMCID: PMC9688416 DOI: 10.3390/bios12111014] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/07/2022] [Accepted: 11/10/2022] [Indexed: 05/27/2023]
Abstract
Surface plasmon-coupled emission (SPCE), a novel signal enhancement technology generated by the interactions between surface plasmons and excited fluorophores in close vicinity to metallic film, has shown excellent performance in bioimaging. Variable-angle nanoplasmonic fluorescence microscopy (VANFM), based on an SPCE imaging system, can selectively modulate the imaging depth by controlling the excitation angles. In order to further improve the imaging performance, Au-Ag alloy nanoshuttles were introduced into an Au substrate to mediate the plasmonic properties. Benefiting from the strong localized plasmon effect of the modified SPCE chip, better imaging brightness, signal-to-background ratio and axial resolution for imaging of the cell membrane region were obtained, which fully displays the imaging advantages of SPCE system. Meanwhile, the imaging signal obtained from the critical angle excitation mode was also amplified, which helps to acquire a more visible image of the cell both from near- and far-field in order to comprehensively investigate the cellular interactions.
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Affiliation(s)
- Kai-Xin Xie
- College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, China
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Zhao Li
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jia-Hua Fang
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Shuo-Hui Cao
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- Department of Electronic Science, Xiamen University, Xiamen 361005, China
| | - Yao-Qun Li
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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Su Q, Jiang C, Gou D, Long Y. Surface Plasmon-Assisted Fluorescence Enhancing and Quenching: From Theory to Application. ACS APPLIED BIO MATERIALS 2021; 4:4684-4705. [PMID: 35007020 DOI: 10.1021/acsabm.1c00320] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The integration of surface plasmon resonance and fluorescence yields a multiaspect improvement in surface fluorescence sensing and imaging, leading to a paradigm shift of surface plasmon-assisted fluorescence techniques, for example, surface plasmon enhanced field fluorescence spectroscopy, surface plasmon coupled emission (SPCE), and SPCE imaging. This Review aims to characterize the unique optical property with a common physical interpretation and diverse surface architecture-based measurements. The fundamental electromagnetic theory is employed to comprehensively unveil the fluorophore-surface plasmon interaction, and the associated surface-modification design is liberally highlighted to balance the surface plasmon-induced fluorescence-enhancement efforts and the surface plasmon-caused fluorescence-quenching effects. In particular, all types of surface structures, for example, silicon, carbon, protein, DNA, polymer, and multilayer, are systematically interrogated in terms of component, thickness, stiffness, and functionality. As a highly interdisciplinary and expanding field in physics, optics, chemistry, and surface chemistry, this Review could be of great interest to a broad readership, in particular, among physical chemists, analytical chemists, and in surface-based sensing and imaging studies.
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Affiliation(s)
- Qiang Su
- Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Carson International Cancer Center, Shenzhen University, 1066 Xueyuan Street, Nanshan District, Shenzhen 518055, Guangdong, China.,School of Chemistry, University of Birmingham, Edgbaston B15 2TT, Birmingham, United Kingdom
| | - Cheng Jiang
- Department of Chemistry, University of Oxford, Oxford OX1 3QZ, United Kingdom.,Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, United Kingdom
| | - Deming Gou
- Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography, Carson International Cancer Center, Shenzhen University, 1066 Xueyuan Street, Nanshan District, Shenzhen 518055, Guangdong, China
| | - Yi Long
- Clinical Research Center, Southern University of Science and Technology Hospital, 6019 Liuxian Street, Xili Avenue, Nanshan District, Shenzhen 518055, Guangdong, China
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Chen M, Cao SH, Li YQ. Surface plasmon-coupled emission imaging for biological applications. Anal Bioanal Chem 2020; 412:6085-6100. [PMID: 32300846 DOI: 10.1007/s00216-020-02635-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 03/08/2020] [Accepted: 03/31/2020] [Indexed: 11/28/2022]
Abstract
Fluorescence imaging technology has been extensively applied in chemical and biological research profiting from its high sensitivity and specificity. Much attention has been devoted to breaking the light diffraction-limited spatial resolution. However, it remains a great challenge to improve the axial resolution in a way that is accessible in general laboratories. Surface plasmon-coupled emission (SPCE), generated by the interactions between surface plasmons and excited fluorophores in close vicinity of the thin metal film, offers an opportunity for optical imaging with potential application in analysis of molecular and biological systems. Benefiting from the highly directional and distance-dependent properties, SPCE imaging (SPCEi) has displayed excellent performance in bioimaging with improved sensitivity and axial confinement. Herein, we give a brief overview of the development of SPCEi. We describe the unique optical characteristics and constructions of SPCEi systems and highlight recent advances in the use of SPCEi for biological applications. We hope this review provides readers with both the insights and future prospects of SPCEi as a new promising imaging platform for potentially widespread applications in biological research and medical diagnostics. Graphical abstract.
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Affiliation(s)
- Min Chen
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China
| | - Shuo-Hui Cao
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China
| | - Yao-Qun Li
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China.
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Xie K, Cao S, Zhai Y, Chen M, Pan X, Watarai H, Li Y. Enhanced modulation of magnetic field on surface plasmon coupled emission (SPCE) by magnetic nanoparticles. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.06.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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7
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Chen M, Pan XH, Liu Q, Huo SX, Cao SH, Zhai YY, Zhao Y, Li YQ. Variable-Angle Nanoplasmonic Fluorescence Microscopy: An Axially Resolved Method for Tracking the Endocytic Pathway. Anal Chem 2019; 91:13658-13664. [DOI: 10.1021/acs.analchem.9b02845] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Min Chen
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China
| | - Xiao-Hui Pan
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China
| | - Qian Liu
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China
| | - Si-Xin Huo
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China
| | - Shuo-Hui Cao
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China
| | - Yan-Yun Zhai
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China
| | - Yan Zhao
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China
| | - Yao-Qun Li
- Department of Chemistry and the MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P.R. China
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Xie KX, Jia SS, Zhang JH, Wang H, Wang Q. Amplified fluorescence by carbon nanotube (CNT)-assisted surface plasmon coupled emission (SPCE) and its biosensing application. NEW J CHEM 2019. [DOI: 10.1039/c9nj03458g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enhancement of SPCE by CNT assistance was investigated, and this strategy used an immunosensor to detect IgG.
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Affiliation(s)
- Kai-Xin Xie
- Department of Chemistry
- Taiyuan Normal University
- Jinzhong 030619
- P. R. China
| | - Shu-Shu Jia
- Department of Chemistry
- Taiyuan Normal University
- Jinzhong 030619
- P. R. China
| | - Jin-Hua Zhang
- Department of Chemistry
- Taiyuan Normal University
- Jinzhong 030619
- P. R. China
| | - Huan Wang
- Department of Chemistry
- Taiyuan Normal University
- Jinzhong 030619
- P. R. China
| | - Qiang Wang
- Department of Chemistry
- Taiyuan Normal University
- Jinzhong 030619
- P. R. China
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In situ induced metal-enhanced fluorescence: A new strategy for biosensing the total acetylcholinesterase activity in sub-microliter human whole blood. Biosens Bioelectron 2015; 68:648-653. [DOI: 10.1016/j.bios.2015.01.061] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 01/21/2015] [Accepted: 01/26/2015] [Indexed: 01/02/2023]
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