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Zhang S, Sun M, Wang X, Wang J, Jia Z, Lv X, Huang X. Spectral-Free Double Light Detection of DNA Based on a Porous Silicon Bragg Mirror. SENSORS (BASEL, SWITZERLAND) 2022; 22:7048. [PMID: 36146395 PMCID: PMC9503906 DOI: 10.3390/s22187048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
To improve the detection sensitivity of a porous silicon optical biosensor in the real-time detection of biomolecules, a non-spectral porous silicon optical biosensor technology, based on dual-signal light detection, is proposed. Double-light detection is a combination of refractive index change detection and fluorescence change detection. It uses quantum dots to label probe molecules to detect target molecules. In the double-signal-light detection method, the first detection-signal light is the detection light that is reflected from the surface of the porous silicon Bragg mirror. The wavelength of the detection light is the same as the wavelength of the photonic band gap edge of the porous silicon Bragg mirror. CdSe/ZnS quantum dots are used to label the probe DNA and hybridize it with the target DNA molecules in the pores of porous silicon to improve its effective refractive index and enhance the detection-reflection light. The second detection-signal light is fluorescence, which is generated by the quantum dots in the reactant that are excited by light of a certain wavelength. The Bragg mirror structure further enhances the fluorescence signal. A digital microscope is used to simultaneously receive the digital image of two kinds of signal light superimposed on the surface of porous silicon, and the corresponding algorithm is used to calculate the change in the average grey value before and after the hybridization reaction to calculate the concentration of the DNA molecules. The detection limit of the DNA molecules was 0.42 pM. This method can not only detect target DNA by hybridization, but also detect antigen by immune reaction or parallel biochip detection for a porous silicon biosensor.
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Affiliation(s)
- Shuangshuang Zhang
- School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China
- School of Energy Engineering, Xinjiang Institute of Engineering, Urumqi 830000, China
| | - Miao Sun
- School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Xinli Wang
- School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China
| | - Jiajia Wang
- School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China
- The Key Laboratory of Signal Detection and Processing, Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830046, China
| | - Zhenhong Jia
- School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China
- The Key Laboratory of Signal Detection and Processing, Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830046, China
| | - Xiaoyi Lv
- School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China
- The Key Laboratory of Signal Detection and Processing, Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830046, China
| | - Xiaohui Huang
- School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China
- The Key Laboratory of Signal Detection and Processing, Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830046, China
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Bai L, Gao Y, Wang J, Aili T, Jia Z, Lv X, Huang X, Yang J. Detection of β-Lactoglobulin by a Porous Silicon Microcavity Biosensor Based on the Angle Spectrum. SENSORS 2022; 22:s22051912. [PMID: 35271059 PMCID: PMC8914963 DOI: 10.3390/s22051912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/10/2022] [Accepted: 02/23/2022] [Indexed: 11/16/2022]
Abstract
In this paper, carbon quantum dot-labelled β-lactoglobulin antibodies were used for refractive index magnification, and β-lactoglobulin was detected by angle spectroscopy. In this method, the detection light is provided by a He-Ne laser whose central wavelength is the same as that of the porous silicon microcavity device, and the light source was changed to a parallel beam to illuminate the porous silicon microcavity’ surface by collimating beam expansion, and the reflected light was received on the porous silicon microcavity’ surface by a detector. The angle corresponding to the smallest luminous intensity before and after the onset of immune response was measured by a detector for different concentrations of β-lactoglobulin antigen and carbon quantum dot-labelled β-lactoglobulin antibodies, and the relationship between the variation in angle before and after the immune response was obtained for different concentrations of the β-lactoglobulin antigen. The results of the experiment present that the angle variations changed linearly with increasing β-lactoglobulin antigen concentration before and after the immune response. The limit of detection of β-lactoglobulin by this method was 0.73 μg/L, indicating that the method can be used to detect β-lactoglobulin quickly and conveniently at low cost.
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Affiliation(s)
- Lanlan Bai
- School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China; (L.B.); (Y.G.)
| | - Yun Gao
- School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China; (L.B.); (Y.G.)
| | - Jiajia Wang
- School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China; (J.W.); (X.H.)
- The Key Laboratory of Signal Detection and Processing, Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830046, China;
| | - Tuerxunnayi Aili
- School of Life Science and Technology, Xinjiang University, Urumqi 830046, China; (T.A.); (J.Y.)
| | - Zhenhong Jia
- School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China; (J.W.); (X.H.)
- The Key Laboratory of Signal Detection and Processing, Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830046, China;
- Correspondence:
| | - Xiaoyi Lv
- The Key Laboratory of Signal Detection and Processing, Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830046, China;
- School of Software, Xinjiang University, Urumqi 830046, China
| | - Xiaohui Huang
- School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China; (J.W.); (X.H.)
- The Key Laboratory of Signal Detection and Processing, Xinjiang Uygur Autonomous Region, Xinjiang University, Urumqi 830046, China;
| | - Jie Yang
- School of Life Science and Technology, Xinjiang University, Urumqi 830046, China; (T.A.); (J.Y.)
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Li Y, Cui C, Song J, Liu Q, Yuan S, Zeng C, Xia J. Precisely ordered Ge quantum dots on a patterned Si microring for enhanced light-emission. NANOTECHNOLOGY 2020; 31:385603. [PMID: 32480391 DOI: 10.1088/1361-6528/ab9862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Semiconductor microcavities can greatly enhance the light-emission of embedded quantum dots (QDs). Here, a new route toward the microcavity-QD system by fabricating microcavities followed by growing ordered QDs on a patterned microresonator is proposed, which keeps QDs from being etched. Self-assembled Ge QDs prefer to form at the rims of Si microrings or microdisks. The Ge QDs on the pit- or groove-patterned microring resonator (MRR) show better size uniformity and position accuracy. These features are explained by the evolutions of surface morphology and surface chemical potential distribution. Sharp photoluminescence peaks in the telecommunication band with the quality factors in the range of 450-850 from groove-patterned MRR are observed at 295 K due to efficient overlap between Ge QDs and resonant modes. Our schemes shed light on the exactly site-controlled growth of QDs on micro- and nano-structures, which further facilitates the investigation of light-matter interactions.
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Affiliation(s)
- Yi Li
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China
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Abu-Thabit N, Ratemi E. Hybrid Porous Silicon Biosensors Using Plasmonic and Fluorescent Nanomaterials: A Mini Review. Front Chem 2020; 8:454. [PMID: 32548094 PMCID: PMC7272471 DOI: 10.3389/fchem.2020.00454] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/01/2020] [Indexed: 12/12/2022] Open
Abstract
During the last two decades, porous silicon (PSi) has been proposed as a high-performance biosensing platform due to its biocompatibility, surface tailorability, and reproducibility. This review focuses on the recent developments and progress in the area related to hybrid PSi biosensors using plasmonic metal nanoparticles (MNPs), fluorescent quantum dots (QDs), or a combination of both MNPs and QDs for creating hybrid nanostructured architectures for ultrasensitive detection of biomolecules. The review discusses the mechanisms of sensitivity enhancement based on Localized Surface Plasmon Resonance (LSPR) of MNPs, Fluorescence Resonance Energy Transfer (FRET) in the case of MNPs/QDs donor-acceptor interactions, and photoluminescence/fluorescence enhancement resulting from the embedded fluorescent QDs inside the PSi microcavity. The review highlights the key features of hybrid PSi/MNPs/QDs biosensors for dual-mode detection applications.
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Affiliation(s)
- Nedal Abu-Thabit
- Department of Chemical and Process Engineering Technology, Jubail Industrial City, Al Jubail, Saudi Arabia
| | - Elaref Ratemi
- Department of Chemical and Process Engineering Technology, Jubail Industrial City, Al Jubail, Saudi Arabia
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