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Moro V, Canals J, Moreno S, Higgins-Wood S, Alonso O, Waag A, Prades JD, Dieguez A. Fluorescence Multi-Detection Device Using a Lensless Matrix Addressable microLED Array. BIOSENSORS 2024; 14:264. [PMID: 38920568 PMCID: PMC11202237 DOI: 10.3390/bios14060264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/29/2024] [Accepted: 05/21/2024] [Indexed: 06/27/2024]
Abstract
A Point-of-Care system for molecular diagnosis (PoC-MD) is described, combining GaN and CMOS chips. The device is a micro-system for fluorescence measurements, capable of analyzing both intensity and lifetime. It consists of a hybrid micro-structure based on a 32 × 32 matrix addressable GaN microLED array, with square LEDs of 50 µm edge length and 100 µm pitch, with an underneath wire bonded custom chip integrating their drivers and placed face-to-face to an array of 16 × 16 single-photon avalanche diodes (SPADs) CMOS. This approach replaces instrumentation based on lasers, bulky optical components, and discrete electronics with a full hybrid micro-system, enabling measurements on 32 × 32 spots. The reported system is suitable for long lifetime (>10 ns) fluorophores with a limit of detection ~1/4 µM. Proof-of-concept measurements of streptavidin conjugate Qdot™ 605 and Amino PEG Qdot™ 705 are demonstrated, along with the device ability to detect both fluorophores in the same measurement.
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Affiliation(s)
- Victor Moro
- Electronic and Biomedical Engineering Department, University of Barcelona, 08028 Barcelona, Spain; (J.C.); (S.M.); (O.A.); (J.D.P.)
| | - Joan Canals
- Electronic and Biomedical Engineering Department, University of Barcelona, 08028 Barcelona, Spain; (J.C.); (S.M.); (O.A.); (J.D.P.)
| | - Sergio Moreno
- Electronic and Biomedical Engineering Department, University of Barcelona, 08028 Barcelona, Spain; (J.C.); (S.M.); (O.A.); (J.D.P.)
| | - Steffen Higgins-Wood
- Institute of Semiconductor Technology, Technical University of Braunschweig, 38106 Braunschweig, Germany; (S.H.-W.); (A.W.)
| | - Oscar Alonso
- Electronic and Biomedical Engineering Department, University of Barcelona, 08028 Barcelona, Spain; (J.C.); (S.M.); (O.A.); (J.D.P.)
| | - Andreas Waag
- Institute of Semiconductor Technology, Technical University of Braunschweig, 38106 Braunschweig, Germany; (S.H.-W.); (A.W.)
| | - J. Daniel Prades
- Electronic and Biomedical Engineering Department, University of Barcelona, 08028 Barcelona, Spain; (J.C.); (S.M.); (O.A.); (J.D.P.)
- Institute of Semiconductor Technology, Technical University of Braunschweig, 38106 Braunschweig, Germany; (S.H.-W.); (A.W.)
| | - Angel Dieguez
- Electronic and Biomedical Engineering Department, University of Barcelona, 08028 Barcelona, Spain; (J.C.); (S.M.); (O.A.); (J.D.P.)
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Skok A, Bazel Y, Vishnikin A, Toth J. Direct immersion single-drop microextraction combined with fluorescence detection using an optical probe. Application for highly sensitive determination of rhodamine 6G. Talanta 2024; 269:125511. [PMID: 38056415 DOI: 10.1016/j.talanta.2023.125511] [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: 09/28/2023] [Revised: 11/28/2023] [Accepted: 12/01/2023] [Indexed: 12/08/2023]
Abstract
The use of an optical probe for fluorescence detection combined with direct immersion single-drop microextraction has been demonstrated as an innovative approach. The optical probe served both as a drop holder for extractant and as a measuring device which made it possible to eliminate the use of cuvettes. A laser and a light emitting diode (LED) were tested as possible light sources. Both of them showed comparable results. However, given the much smaller half-band width of the laser radiation, its use has proven to be preferable since background correction can be eliminated. Direct immersion single-drop microextraction of an ionic association complex of rhodamine 6G with picric acid with subsequent fluorescent detection (λex was 532 nm and 525 nm for laser and LED, respectively; λem was 560 nm for both laser and LED) was used a model system to evaluate the new approach. The extractant phase was a 55 μL amyl acetate microdrop fixed in the optical part of the probe. LOD, LOQ and linear calibration range were found as 0.14, 0.48 and 0.5-10 nmol L-1, and 0.15, 0.50 and 0.5-5 nmol L-1 for laser and LED light sources, respectively. The accuracy of the method was assessed by analyzing real water samples.
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Affiliation(s)
- Arina Skok
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic.
| | - Yaroslav Bazel
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic.
| | - Andriy Vishnikin
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic; Department of Analytical Chemistry, Faculty of Chemistry, Oles Honchar Dnipro National University, Gagarin Av. 72, 49010, Dnipro, Ukraine
| | - Ján Toth
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 040 01, Košice, Slovak Republic; Department of Technical Disciplines in Health Care, Faculty of Health Care, University of Prešov, Prešov, Slovak Republic
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Zhao H, Han H, Lin Q, Huang L, Su X, Fang Y, Zhang Y, Su E, Chen Z, Li S, Deng Y, He N. A New Hematocrit Measurement Method Using a Chemiluminescence Biosensor and Its Application in a Chemiluminescence Immunoassay Platform for Myocardial Markers Detection with Whole Blood Samples. BIOSENSORS 2022; 13:3. [PMID: 36671839 PMCID: PMC9856183 DOI: 10.3390/bios13010003] [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: 10/29/2022] [Revised: 12/12/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
The accuracy and precision of analyte concentrations measured in whole blood by chemiluminescence immunoassay (CLIA) have been significantly affected by erythrocytes, which leads to poor application of whole blood CLIA in clinical practice. In this work, a chemiluminescence biosensing optical platform for blood hematocrit (HCT) analysis using MAGICL 6000 (Getein Biotechnology, Nanjing, China) was designed, implemented, and fully characterized. The developed method was successfully applied to determine various HCT levels of human blood from 0% to 65%, with a correlation coefficient of 0.9885 compared with the conventional method (Sysmex XE 5000, Kobe, Japan). A mathematical model was developed to quantitatively evaluate the impact of HCT on the results of two sample types (whole blood vs. plasma). Combining the established HCT method and mathematical model with CLIA on MAGICL 6000, the precision was significantly improved by almost 20%. Comparison studies using whole blood samples and corresponding plasma samples showed that the square of the correlation coefficients of troponin I (cTnI), myoglobin (MYO), creatine kinase MB (CK-MB), and N-terminal pro-hormone brain natriuretic peptide (NT-proBNP) were increased to 0.9992, 0.9997, 0.9996, and 0.9994, respectively, showing a great potential for clinical application.
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Affiliation(s)
- Huan Zhao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Getein Biotechnology Co., Ltd., Nanjing 210000, China
| | - Hao Han
- Getein Biotechnology Co., Ltd., Nanjing 210000, China
| | - Qifeng Lin
- Getein Biotechnology Co., Ltd., Nanjing 210000, China
| | - Li Huang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Getein Biotechnology Co., Ltd., Nanjing 210000, China
| | - Xiangyi Su
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yile Fang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yuanying Zhang
- Department of Molecular Biology, Jiangsu Cancer Hospital, Nanjing 210009, China
| | - Enben Su
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Getein Biotechnology Co., Ltd., Nanjing 210000, China
| | - Zhu Chen
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China
| | - Song Li
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China
| | - Yan Deng
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China
| | - Nongyue He
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China
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