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Rayhan MSA, Talukder A, Rani S, Easin KB, Hossain MA, Biswas PC. Visible diffuse reflectance smartphone spectrometer with high spectral accuracy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 326:125240. [PMID: 39378831 DOI: 10.1016/j.saa.2024.125240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 09/11/2024] [Accepted: 09/30/2024] [Indexed: 10/10/2024]
Abstract
A smartphone-based spectrometer employing principle of diffuse reflection is reported for the surface analysis of solid samples. The instrument utilizes a thin-film grating to diffract incoming light, while a diffuse reflecting surface projects the image of this diffracted light onto the detector plane. The CMOS camera of smartphone camera directly captures the diffusely reflected photons within its limited field-of-view thus eliminating the need for collection, conditioning and converging optics. The optical setup of the instrument provides facility to calibrate the spectral response considering the nonlinear distribution of the wavelength across the diffraction direction. Additional correction in the detector response at different light intensity results a reduced spectral error with a maximum wavelength resolution of δλ=0.08 nm/pixel in the camera within the spectral range Δλ = (400 - 700) nm. As a proof of the concept, the instrument demonstrates successful detection of color pigments in food samples by absorption measurement of the samples at an average spectral error < 6 %. The distinct absorption peak associated with standard food colors are compared against the absorption profile of unknown food colors used in pastry cake. This field-functional smart analysis with internet connectivity opens opportunity of identifying food adulteration by using toxic chemical colors at the point-of-test and immediate reporting to others. The overall instrument is fabricated by utilizing low-cost and light weight plastic wood to make compact (110 mm × 105 mm × 125 mm), robust, inexpensive (∼$ 50) and suitable for field-portable (∼145 gm) hand-held operation.
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Affiliation(s)
- Md Sadik Al Rayhan
- Department of Electrical and Electronic Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh
| | - Arnab Talukder
- Department of Electrical and Electronic Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh
| | - Saptami Rani
- Department of Electrical and Electronic Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh
| | - Khaled Bin Easin
- Department of Electrical and Electronic Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh
| | - Md Arafat Hossain
- Department of Electrical and Electronic Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh
| | - Protik Chandra Biswas
- Department of Electrical and Electronic Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh.
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2
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Albuquerque JRDP, Makara CN, Ferreira VG, Brazaca LC, Carrilho E. Low-cost precision agriculture for sustainable farming using paper-based analytical devices. RSC Adv 2024; 14:23392-23403. [PMID: 39055267 PMCID: PMC11270003 DOI: 10.1039/d4ra02310b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 07/11/2024] [Indexed: 07/27/2024] Open
Abstract
The United Nations estimates that by 2030, agricultural production must increase by 70% to meet food demand. Precision agriculture (PA) optimizes production through efficient resource use, with soil fertility being crucial for nutrient supply. Traditional nutrient quantification methods are costly and time-consuming. This study introduces a rapid (15 min), user-friendly, paper-based platform for determining four essential macronutrients-nitrate, magnesium, calcium, and ammonium-using colorimetric methods and a smartphone for data reading and storage. The sensor effectively detects typical soil nutrient concentrations, showing strong linearity and adequate detection limits. For nitrate, the RGB method resulted in an R 2 of 0.992, a detection range of 0.5 to 10.0 mmol L-1, and an LOD of 0.299 mmol L-1. Calcium quantification using grayscale displayed an R 2 of 0.993, a detection range of 2.0 to 6.0 mmol L-1, and an LOD of 0.595 mmol L-1. Magnesium was best quantified using the hue color space, with an R 2 of 0.999, a detection range of 1.0 to 6.0 mmol L-1, and an LOD of 0.144 mmol L-1. Similarly, ammonium detection using the hue color space had an R 2 of 0.988, a range of 0.5 to 2.5 mmol L-1, and an LOD of 0.170 mmol L-1. This device enhances soil fertility assessment accessibility, supporting PA implementation and higher food production.
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Affiliation(s)
- Jéssica Rodrigues de Paula Albuquerque
- Instituto de Química de São Carlos, Universidade de São Paulo 400, Trabalhador São-carlense Ave. São Carlos SP 13566-590 Brazil
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica - INCTBio Campinas SP 13083-970 Brazil
| | - Cleyton Nascimento Makara
- Instituto de Química de São Carlos, Universidade de São Paulo 400, Trabalhador São-carlense Ave. São Carlos SP 13566-590 Brazil
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica - INCTBio Campinas SP 13083-970 Brazil
| | - Vinícius Guimarães Ferreira
- Instituto de Química de São Carlos, Universidade de São Paulo 400, Trabalhador São-carlense Ave. São Carlos SP 13566-590 Brazil
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica - INCTBio Campinas SP 13083-970 Brazil
| | - Laís Canniatti Brazaca
- Instituto de Química de São Carlos, Universidade de São Paulo 400, Trabalhador São-carlense Ave. São Carlos SP 13566-590 Brazil
| | - Emanuel Carrilho
- Instituto de Química de São Carlos, Universidade de São Paulo 400, Trabalhador São-carlense Ave. São Carlos SP 13566-590 Brazil
- Instituto Nacional de Ciência e Tecnologia de Bioanalítica - INCTBio Campinas SP 13083-970 Brazil
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3
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Jiang KP, Bennett S, Heiniger EK, Kumar S, Yager P. UbiNAAT: a multiplexed point-of-care nucleic acid diagnostic platform for rapid at-home pathogen detection. LAB ON A CHIP 2024; 24:492-504. [PMID: 38164805 DOI: 10.1039/d3lc00753g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The COVID-19 pandemic increased demands for respiratory disease testing to facilitate treatment and limit transmission, demonstrating in the process that most existing test options were too complex and expensive to perform in point-of-care or home scenarios. Lab-based molecular techniques can detect viral RNA in respiratory illnesses but are expensive and require trained personnel, while affordable antigen-based home tests lack sensitivity for early detection in newly infected or asymptomatic individuals. The few home RNA detection tests deployed were prohibitively expensive. Here, we demonstrate a point-of-care, paper-based rapid analysis device that simultaneously detects multiple viral RNAs; it is demonstrated on two common respiratory viruses (COVID-19 and influenza A) spiked onto a commercial nasal swab. The automated device requires no sample preparation by the user after insertion of the swab, minimizing user operation steps. We incorporated lyophilized amplification reagents immobilized in a porous matrix, a novel thermally actuated valve for multiplexed fluidic control, a printed circuit board that performs on-device lysis and amplification within a cell-phone-sized disposable device. Reverse transcription loop-mediated isothermal amplification (RT-LAMP) products are visualized via fluorescent dyes using a modified cell phone, resulting in detection of as few as 104 viral copies per swab across both pathogens within 30 minutes. This integrated platform could be commercialized in a form that would be inexpensive, portable, and sensitive; it can readily be multiplexed to detect as many as 8 different RNA or DNA sequences, and adapted to any desired RNA or DNA detection assays.
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Affiliation(s)
- Kevin P Jiang
- Department of Bioengineering, University of Washington, Seattle, WA 98105, USA.
| | - Steven Bennett
- Department of Bioengineering, University of Washington, Seattle, WA 98105, USA.
| | - Erin K Heiniger
- Department of Bioengineering, University of Washington, Seattle, WA 98105, USA.
| | - Sujatha Kumar
- Department of Bioengineering, University of Washington, Seattle, WA 98105, USA.
| | - Paul Yager
- Department of Bioengineering, University of Washington, Seattle, WA 98105, USA.
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4
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Zhang T, Zeng Q, Ji F, Wu H, Ledesma-Amaro R, Wei Q, Yang H, Xia X, Ren Y, Mu K, He Q, Kang Z, Deng R. Precise in-field molecular diagnostics of crop diseases by smartphone-based mutation-resolved pathogenic RNA analysis. Nat Commun 2023; 14:4327. [PMID: 37468480 PMCID: PMC10356797 DOI: 10.1038/s41467-023-39952-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 07/05/2023] [Indexed: 07/21/2023] Open
Abstract
Molecular diagnostics for crop diseases can guide the precise application of pesticides, thereby reducing pesticide usage while improving crop yield, but tools are lacking. Here, we report an in-field molecular diagnostic tool that uses a cheap colorimetric paper and a smartphone, allowing multiplexed, low-cost, rapid detection of crop pathogens. Rapid nucleic acid amplification-free detection of pathogenic RNA is achieved by combining toehold-mediated strand displacement with a metal ion-mediated urease catalysis reaction. We demonstrate multiplexed detection of six wheat pathogenic fungi and an early detection of wheat stripe rust. When coupled with a microneedle for rapid nucleic acid extraction and a smartphone app for results analysis, the sample-to-result test can be completed in ~10 min in the field. Importantly, by detecting fungal RNA and mutations, the approach allows to distinguish viable and dead pathogens and to sensitively identify mutation-carrying fungicide-resistant isolates, providing fundamental information for precision crop disease management.
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Affiliation(s)
- Ting Zhang
- College of Biomass Science and Engineering, Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610065, China
| | - Qingdong Zeng
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, 712100, China
| | - Fan Ji
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, 712100, China
| | - Honghong Wu
- MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Rodrigo Ledesma-Amaro
- Department of Bioengineering, Imperial College Centre for Synthetic Biology, Imperial College London, London, SW7 2AZ, UK
| | - Qingshan Wei
- Department of Chemical and Biomolecular Engineering, Emerging Plant Disease and Global Food Security Cluster, North Carolina State University, Raleigh, NC, 27696, USA
| | - Hao Yang
- College of Biomass Science and Engineering, Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610065, China
| | - Xuhan Xia
- College of Biomass Science and Engineering, Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610065, China
| | - Yao Ren
- College of Biomass Science and Engineering, Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610065, China
| | - Keqing Mu
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, 712100, China
| | - Qiang He
- College of Biomass Science and Engineering, Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610065, China
| | - Zhensheng Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, 712100, China
| | - Ruijie Deng
- College of Biomass Science and Engineering, Healthy Food Evaluation Research Center, Sichuan University, Chengdu, 610065, China.
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Zhang G, Song S, Panescu J, Shapiro N, Dannemiller KC, Qin R. A novel systems solution for accurate colorimetric measurement through smartphone-based augmented reality. PLoS One 2023; 18:e0287099. [PMID: 37319291 PMCID: PMC10270580 DOI: 10.1371/journal.pone.0287099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 05/30/2023] [Indexed: 06/17/2023] Open
Abstract
Quantifying the colors of objects is useful in a wide range of applications, including medical diagnosis, agricultural monitoring, and food safety. Accurate colorimetric measurement of objects is a laborious process normally performed through a color matching test in the laboratory. A promising alternative is to use digital images for colorimetric measurement, due to their portability and ease of use. However, image-based measurements suffer from errors caused by the non-linear image formation process and unpredictable environmental lighting. Solutions to this problem often perform relative color correction among multiple images through discrete color reference boards, which may yield biased results due to the lack of continuous observation. In this paper, we propose a smartphone-based solution, that couples a designated color reference board with a novel color correction algorithm, to achieve accurate and absolute color measurements. Our color reference board contains multiple color stripes with continuous color sampling at the sides. A novel correction algorithm is proposed to utilize a first-order spatial varying regression model to perform the color correction, which leverages both the absolute color magnitude and scale to maximize the correction accuracy. The proposed algorithm is implemented as a "human-in-the-loop" smartphone application, where users are guided by an augmented reality scheme with a marker tracking module to take images at an angle that minimizes the impact of non-Lambertian reflectance. Our experimental results show that our colorimetric measurement is device independent and can reduce up to 90% color variance for images collected under different lighting conditions. In the application of reading pH values from test papers, we show that our system performs 200% better than human reading. The designed color reference board, the correction algorithm, and our augmented reality guiding approach form an integrated system as a novel solution to measure color with increased accuracy. This technique has the flexibility to improve color reading performance in systems beyond existing applications, evidenced by both qualitative and quantitative experiments on example applications such as pH-test reading.
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Affiliation(s)
- Guixiang Zhang
- Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, Ohio, United States of America
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio, United States of America
- Geospatial Data Analytics Lab, The Ohio State University, Columbus, Ohio, United States of America
| | - Shuang Song
- Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, Ohio, United States of America
- Geospatial Data Analytics Lab, The Ohio State University, Columbus, Ohio, United States of America
| | - Jenny Panescu
- Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, Ohio, United States of America
| | - Nicholas Shapiro
- Institute for Society and Genetics, University of California, Los Angeles, Los Angeles, California, United States of America
| | - Karen C. Dannemiller
- Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, Ohio, United States of America
- Environmental Health Sciences, The Ohio State University, Columbus, Ohio, United States of America
- Sustainability Institute, The Ohio State University, Columbus, Ohio, United States of America
| | - Rongjun Qin
- Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, Columbus, Ohio, United States of America
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio, United States of America
- Geospatial Data Analytics Lab, The Ohio State University, Columbus, Ohio, United States of America
- Translational Data Analytics Institute, The Ohio State University, Columbus, Ohio, United States of America
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6
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Schaumburg F, Pujato N, Peverengo LM, Marcipar IS, Berli CLA. Coupling ELISA to smartphones for POCT of chronic and congenital Chagas disease. Talanta 2023; 256:124246. [PMID: 36657239 DOI: 10.1016/j.talanta.2022.124246] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/28/2022] [Accepted: 12/30/2022] [Indexed: 01/07/2023]
Abstract
Chagas disease (CD) affects about 7 million people worldwide, presents a large prevalence in Latin America, and is growing in the rest of the world, where congenital CD is the main mode of transmission. Point-of-care testing (POCT) methods are increasingly required to ease early diagnostics and increase treatment success. This work presents the development and validation of a smartphone-integrated ELISA-based POCT system for the detection of both chronic and congenital CD. Expensive and bulky equipment used for ELISA in conventional laboratories was replaced as follows. A miniaturized device was fabricated for incubation of commercial ELISA plates, achieving ∼±1 °C uniformity and stability. The ELISA plate reader was replaced by smartphone camera and image processing, comprising algorithms to account for variability sources and spatial light non-uniformity; thus, additional hardware like a dark-box is not required. The agreement between samples classified with this novel reading method vs. ELISA plate reader was found to be 99.7% and 95.4% for chronic and congenital CD, respectively. Furthermore, a smartphone application was designed and implemented to guide the user during the assay, provide connectivity, and access databases, facilitating patient monitoring and health-policy making. The whole system is aimed to be used as a practical diagnostic tool in primary health care settings, as well as to facilitate patients' follow-up to provide better treatment. Concerning the technology itself, the proposed POCT platform is versatile enough to be readily adapted for the detection of other infectious diseases.
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Affiliation(s)
- Federico Schaumburg
- INTEC (Universidad Nacional del Litoral-CONICET), Predio CCT CONICET-Santa Fe, RN 168, Santa Fe, S3000GLN, Argentina.
| | - Nazarena Pujato
- Laboratorio de Tecnología Inmunológica (FBCB, Universidad Nacional del Litoral), Ciudad Universitaria, RN 168, Santa Fe, S3000GLN, Argentina.
| | - Luz María Peverengo
- Laboratorio de Tecnología Inmunológica (FBCB, Universidad Nacional del Litoral), Ciudad Universitaria, RN 168, Santa Fe, S3000GLN, Argentina.
| | - Iván Sergio Marcipar
- Laboratorio de Tecnología Inmunológica (FBCB, Universidad Nacional del Litoral), Ciudad Universitaria, RN 168, Santa Fe, S3000GLN, Argentina.
| | - Claudio Luis Alberto Berli
- INTEC (Universidad Nacional del Litoral-CONICET), Predio CCT CONICET-Santa Fe, RN 168, Santa Fe, S3000GLN, Argentina.
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7
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Naghdi T, Ardalan S, Asghari Adib Z, Sharifi AR, Golmohammadi H. Moving toward smart biomedical sensing. Biosens Bioelectron 2023; 223:115009. [PMID: 36565545 DOI: 10.1016/j.bios.2022.115009] [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: 07/02/2022] [Revised: 11/01/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
The development of novel biomedical sensors as highly promising devices/tools in early diagnosis and therapy monitoring of many diseases and disorders has recently witnessed unprecedented growth; more and faster than ever. Nonetheless, on the eve of Industry 5.0 and by learning from defects of current sensors in smart diagnostics of pandemics, there is still a long way to go to achieve the ideal biomedical sensors capable of meeting the growing needs and expectations for smart biomedical/diagnostic sensing through eHealth systems. Herein, an overview is provided to highlight the importance and necessity of an inevitable transition in the era of digital health/Healthcare 4.0 towards smart biomedical/diagnostic sensing and how to approach it via new digital technologies including Internet of Things (IoT), artificial intelligence, IoT gateways (smartphones, readers), etc. This review will bring together the different types of smartphone/reader-based biomedical sensors, which have been employing for a wide variety of optical/electrical/electrochemical biosensing applications and paving the way for future eHealth diagnostic devices by moving towards smart biomedical sensing. Here, alongside highlighting the characteristics/criteria that should be met by the developed sensors towards smart biomedical sensing, the challenging issues ahead are delineated along with a comprehensive outlook on this extremely necessary field.
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Affiliation(s)
- Tina Naghdi
- Nanosensors Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186, Tehran, Iran
| | - Sina Ardalan
- Nanosensors Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186, Tehran, Iran
| | - Zeinab Asghari Adib
- Nanosensors Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186, Tehran, Iran
| | - Amir Reza Sharifi
- Nanosensors Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186, Tehran, Iran
| | - Hamed Golmohammadi
- Nanosensors Bioplatforms Laboratory, Chemistry and Chemical Engineering Research Center of Iran, 14335-186, Tehran, Iran.
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8
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Rink S, Baeumner AJ. Progression of Paper-Based Point-of-Care Testing toward Being an Indispensable Diagnostic Tool in Future Healthcare. Anal Chem 2023; 95:1785-1793. [PMID: 36608282 DOI: 10.1021/acs.analchem.2c04442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Point-of-care (POC) diagnostics in particular focuses on the timely identification of harmful conditions close to the patients' needs. For future healthcare these diagnostics could be an invaluable tool especially in a digitalized or telemedicine-based system. However, while paper-based POC tests, with the most prominent example being the lateral flow assay (LFA), have been especially successful due to their simplicity and timely response, the COVID-19 pandemic highlighted their limitations, such as low sensitivity and ambiguous responses. This perspective discusses strategies that are currently being pursued to evolve such paper-based POC tests toward a superior diagnostic tool that provides high sensitivities, objective result interpretation, and multiplexing options. Here, we pinpoint the challenges with respect to (i) measurability and (ii) public applicability, exemplified with select cases. Furthermore, we highlight promising endeavors focused on (iii) increasing the sensitivity, (iv) multiplexing capability, and (v) objective evaluation to also ready the technology for integration with machine learning into digital diagnostics and telemedicine. The status quo in academic research and industry is outlined, and the likely highly relevant role of paper-based POC tests in future healthcare is suggested.
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Affiliation(s)
- Simone Rink
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93053 Regensburg, Germany
| | - Antje J Baeumner
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93053 Regensburg, Germany
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9
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Xing G, Ai J, Wang N, Pu Q. Recent progress of smartphone-assisted microfluidic sensors for point of care testing. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Yang M, Chen D, Hu J, Zheng X, Lin ZJ, Zhu H. The application of coffee-ring effect in analytical chemistry. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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11
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Vu BV, Lei R, Mohan C, Kourentzi K, Willson RC. Flash Characterization of Smartphones Used in Point-of-Care Diagnostics. BIOSENSORS 2022; 12:1060. [PMID: 36551027 PMCID: PMC9776052 DOI: 10.3390/bios12121060] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/03/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
Rapidly growing interest in smartphone cameras as the basis of point-of-need diagnostic and bioanalytical technologies increases the importance of quantitative characterization of phone optical performance under real-world operating conditions. In the context of our development of lateral-flow immunoassays based on phosphorescent nanoparticles, we have developed a suite of tools for characterizing the temporal and spectral profiles of smartphone torch and flash emissions, and their dependence on phone power state. In this work, these tools are described and documented to make them easily available to others, and demonstrated by application to characterization of Apple iPhone 5s, iPhone 6s, iPhone 8, iPhone XR, and Samsung Note8 flash performance as a function of time and wavelength, at a variety of power settings. Flash and torch intensity and duration vary with phone state and among phone models. Flash has high variability when the battery charge is below 10%, thus, smartphone-based Point-of-Care (POC) tests should only be performed at a battery level of at least 15%. Some output variations could substantially affect the results of assays that rely on the smartphone flash.
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Affiliation(s)
- Binh V. Vu
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA
| | - Rongwei Lei
- Department of Biomedical Engineering, University of Houston, Houston, TX 77204, USA
| | - Chandra Mohan
- Department of Biomedical Engineering, University of Houston, Houston, TX 77204, USA
| | - Katerina Kourentzi
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA
| | - Richard C. Willson
- William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, TX 77204, USA
- Department of Biomedical Engineering, University of Houston, Houston, TX 77204, USA
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA
- Escuela de Medicina y Ciencias de la Salud ITESM, Monterrey 64710, NL, Mexico
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12
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Grazioli C, Dossi N, Cesaro F, Svigelj R, Toniolo R, Bontempelli G. A 3D printed Do-It-Yourself miniaturized device with a sensor responsive at six different wavelengths for reflectance measurements on paper-based supports. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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13
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Ding C, Chen X, Chen X, Liu Y, Xia M, He Z, Kang Q, Yan X. Point-of-care testing for lysine concentration in swine serum via blue-emissive carbon dot-entrapped microfluidic chip. ANIMAL NUTRITION (ZHONGGUO XU MU SHOU YI XUE HUI) 2022; 12:236-244. [PMID: 36712405 PMCID: PMC9868343 DOI: 10.1016/j.aninu.2022.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 06/16/2022] [Accepted: 08/13/2022] [Indexed: 01/19/2023]
Abstract
Lysine is one of the essential amino acids and plays a vital role in the growth, development and health of pigs. Blood lysine concentration is a direct indication of lysine status; however, current methods can not satisfy the demands for rapid and on-site lysine concentration measurement of swine serum. Here, we developed blue-emissive nitrogen-doped carbon dots as a fluorescence probe for the determination of lysine with high fluorescence quantum yield, stability, sensitivity and specificity. The carbon dots were entrapped within hydrogel microstructures to fabricate microfluidic chips for rapid assay for lysine quantification. We further developed an imaging attachment to integrate the microfluidic chip and a smartphone into a portable point-of-care testing platform. This platform requires only 3 μL sample and has a linear detection range of 25 to 300 μmol/L with a limit of detection less than 16 μmol/L, which covers the normal range of lysine concentration in swine serum. We tested lysine concentration in swine serum using this platform with high accuracy, low sample consumption, and within 3 min. Together, these results may provide a rapid and portable platform for dynamic monitoring of swine lysine status and contribute to precise feed formula modulation with low-protein diet strategy.
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Advances in the Measurement of Polymeric Colorimetric Sensors Using Portable Instrumentation: Testing the Light Influence. Polymers (Basel) 2022; 14:polym14204285. [PMID: 36297863 PMCID: PMC9610941 DOI: 10.3390/polym14204285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/06/2022] [Accepted: 10/10/2022] [Indexed: 11/17/2022] Open
Abstract
Sustainable and green sensors based on polydimethyl siloxane (PDMS) or cellulose polymers, as a case of study of the use of portable instrumentation joined to a smartphone, have been tested. A smartphone camera was used to obtain images and was also coupled to a minispectrometer, without and with an optical fiber probe to register spectra. To study light influence on the analytical signal, light-emitting diode (LED), halogen light and daylight have been assayed. A corrective palette of 24 colors and a set with 45 colors from different color ranges were used as the validation set. The results indicated that halogen light was the best option to obtain the spectra. However, for digital image analysis, it was the LED light that gave a greater approximation of the RGB values of the real colors. Based on these results, the spectra and the RGB components of PDMS solid sensors doped with 1,2-naphtoquinone-4-sulfonate (NQS) for the determination of ammonium in water or urea in urine, PDMS doped with Griess reagent for developing the assay of nitrite in waters and cellulose sensors for the determination of hydrogen sulfide in the atmospheres have been obtained. The results achieved were good in terms of sensitivity and linearity and were comparable to those obtained using a laboratory benchtop instrument. Several rules for selecting the most suitable light source to obtain the spectra and/or images have been established and an image correction method has been introduced.
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Sun Z, Qing M, Fan YZ, Yan H, Li NB, Luo HQ. Quadruple analyte responsive platform: Point-of-care testing and multi-coding logic computation based on metal ions recognition and selective response. JOURNAL OF HAZARDOUS MATERIALS 2022; 437:129331. [PMID: 35709623 DOI: 10.1016/j.jhazmat.2022.129331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 06/04/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
While it is recognized that instrumentation techniques can provide precise and sensitive solutions to heavy metal ion monitoring, it remains challenging to transform laboratory testing into a convenient, on-site, and quantitative sensing platform for point-of-care testing (POCT) in a resource-constrained setting. To address these limitations, an affordable and user-friendly colorimetric POCT sensing system is proposed here for selectively monitoring four metal ions (Fe3+, Co2+, Pb2+, and Cd2+) based on the sulfur quantum dots (S dots). Quadruple distinct visual signals (green, brown, precipitation, and bright yellow) are presented on the fabricated paper-based analytical devices (PADs) when mixing S dots and metal ions. The high-quality photographs of the PADs are captured by a scanner, while a smartphone App converts visual signals to HSV values. The quantitative analysis relies on the digital colorimetric reading, and the limits of detection are 0.59, 0.47, 0.82, and 0.53 μM for Fe3+, Co2+, Cd2+, and Pb2+, respectively. This metal ions-responsive platform is engineered as a smart strategy for multiple logic operations (YES, NOT, AND, INHIBIT, and NOR) by integrating multi-responsive blocks into the S dots with encoded patterns, which improves the computing capability. Accordingly, this strategy demonstrates its potential for on-site environmental testing and sophisticated molecular computation.
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Affiliation(s)
- Zhe Sun
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Min Qing
- College of Pharmacy, Chongqing Medical University, Chongqing 400016, China
| | - Yu Zhu Fan
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Hang Yan
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Nian Bing Li
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Hong Qun Luo
- Key Laboratory of Eco-Environments in Three Gorges Reservoir Region (Ministry of Education), School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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Xiao M, Tian F, Liu X, Zhou Q, Pan J, Luo Z, Yang M, Yi C. Virus Detection: From State-of-the-Art Laboratories to Smartphone-Based Point-of-Care Testing. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105904. [PMID: 35393791 PMCID: PMC9110880 DOI: 10.1002/advs.202105904] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/27/2022] [Indexed: 05/07/2023]
Abstract
Infectious virus outbreaks pose a significant challenge to public healthcare systems. Early and accurate virus diagnosis is critical to prevent the spread of the virus, especially when no specific vaccine or effective medicine is available. In clinics, the most commonly used viral detection methods are molecular techniques that involve the measurement of nucleic acids or proteins biomarkers. However, most clinic-based methods require complex infrastructure and expensive equipment, which are not suitable for low-resource settings. Over the past years, smartphone-based point-of-care testing (POCT) has rapidly emerged as a potential alternative to laboratory-based clinical diagnosis. This review summarizes the latest development of virus detection. First, laboratory-based and POCT-based viral diagnostic techniques are compared, both of which rely on immunosensing and nucleic acid detection. Then, various smartphone-based POCT diagnostic techniques, including optical biosensors, electrochemical biosensors, and other types of biosensors are discussed. Moreover, this review covers the development of smartphone-based POCT diagnostics for various viruses including COVID-19, Ebola, influenza, Zika, HIV, et al. Finally, the prospects and challenges of smartphone-based POCT diagnostics are discussed. It is believed that this review will aid researchers better understand the current challenges and prospects for achieving the ultimate goal of containing disease-causing viruses worldwide.
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Affiliation(s)
- Meng Xiao
- Guangdong Provincial Key Laboratory of Sensing Technology and Biomedical Instrument, School of Biomedical EngineeringShenzhen Campus of Sun Yat‐Sen UniversityShenzhen518107P. R. China
| | - Feng Tian
- Department of Biomedical EngineeringThe Hong Kong Polytechnic UniversityHunghomHong Kong999077P. R. China
| | - Xin Liu
- Guangdong Provincial Key Laboratory of Sensing Technology and Biomedical Instrument, School of Biomedical EngineeringShenzhen Campus of Sun Yat‐Sen UniversityShenzhen518107P. R. China
| | - Qiaoqiao Zhou
- Guangdong Provincial Key Laboratory of Sensing Technology and Biomedical Instrument, School of Biomedical EngineeringShenzhen Campus of Sun Yat‐Sen UniversityShenzhen518107P. R. China
| | - Jiangfei Pan
- Guangdong Provincial Key Laboratory of Sensing Technology and Biomedical Instrument, School of Biomedical EngineeringShenzhen Campus of Sun Yat‐Sen UniversityShenzhen518107P. R. China
| | - Zhaofan Luo
- Department of Clinical LaboratoryThe Seventh Affiliated Hospital of Sun Yat‐Sen UniversityShenzhen518107P. R. China
| | - Mo Yang
- Department of Biomedical EngineeringThe Hong Kong Polytechnic UniversityHunghomHong Kong999077P. R. China
| | - Changqing Yi
- Guangdong Provincial Key Laboratory of Sensing Technology and Biomedical Instrument, School of Biomedical EngineeringShenzhen Campus of Sun Yat‐Sen UniversityShenzhen518107P. R. China
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Schaumburg F, Vidocevich JP, Gerlero GS, Pujato N, Macagno J, Kler PA, Berli CLA. A free customizable tool for easy integration of microfluidics and smartphones. Sci Rep 2022; 12:8969. [PMID: 35624294 PMCID: PMC9142529 DOI: 10.1038/s41598-022-13099-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 03/30/2022] [Indexed: 12/04/2022] Open
Abstract
The integration of smartphones and microfluidics is nowadays the best possible route to achieve effective point-of-need testing (PONT), a concept increasingly demanded in the fields of human health, agriculture, food safety, and environmental monitoring. Nevertheless, efforts are still required to integrally seize all the advantages of smartphones, as well as to share the developments in easily adoptable formats. For this purpose, here we present the free platform appuente that was designed for the easy integration of microfluidic chips, smartphones, and the cloud. It includes a mobile app for end users, which provides chip identification and tracking, guidance and control, processing, smart-imaging, result reporting and cloud and Internet of Things (IoT) integration. The platform also includes a web app for PONT developers, to easily customize their mobile apps and manage the data of administered tests. Three application examples were used to validate appuente: a dummy grayscale detector that mimics quantitative colorimetric tests, a root elongation assay for pesticide toxicity assessment, and a lateral flow immunoassay for leptospirosis detection. The platform openly offers fast prototyping of smartphone apps to the wide community of lab-on-a-chip developers, and also serves as a friendly framework for new techniques, IoT integration and further capabilities. Exploiting these advantages will certainly help to enlarge the use of PONT with real-time connectivity in the near future.
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Affiliation(s)
- Federico Schaumburg
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Colectora RN 168, S3000GLN, Santa Fe, Argentina.
| | - Juan P Vidocevich
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Colectora RN 168, S3000GLN, Santa Fe, Argentina
| | - Gabriel S Gerlero
- Centro de Investigación de Métodos Computacionales (CIMEC, UNL-CONICET), Colectora RN 168, S3000GLN, Santa Fe, Argentina
| | - Nazarena Pujato
- Laboratorio de Tecnología Inmunológica (FBCB, UNL), Colectora RN 168, S3000GLN, Santa Fe, Argentina
| | - Joana Macagno
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Colectora RN 168, S3000GLN, Santa Fe, Argentina
| | - Pablo A Kler
- Centro de Investigación de Métodos Computacionales (CIMEC, UNL-CONICET), Colectora RN 168, S3000GLN, Santa Fe, Argentina
| | - Claudio L A Berli
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Colectora RN 168, S3000GLN, Santa Fe, Argentina.
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Lyu X, Sasaki Y, Ohshiro K, Tang W, Yuan Y, Minami T. Printed 384-Well Microtiter Plate on Paper for Fluorescent Chemosensor Array in Food Analysis. Chem Asian J 2022; 17:e202200479. [PMID: 35612563 DOI: 10.1002/asia.202200479] [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: 05/07/2022] [Revised: 05/24/2022] [Indexed: 11/06/2022]
Abstract
We propose a printed 384-well microtiter paper-based fluorescent chemosensor array device (384-well microtiter PCAD) to simultaneously categorize and discriminate saccharides and sulfur-containing amino acids for food analysis. The 384-well microtiter PCAD required 1 μL/4 mm 2 of each well can allow high-throughput sensing. The device embedded with self-assembled fluorescence chemosensors displayed a fingerprint-like response pattern for targets, the image of which was rapidly captured by a portable digital camera. Indeed, the paper-based chemosensor array system combined with imaging analysis and pattern recognition techniques successfully not only categorized saccharides and sulfur-containing amino acids but also classified mono- and disaccharide groups. Furthermore, the quantitative detectability of the printed device was revealed by a spike recovery test for fructose and glutathione in a diluted freshly made tomato juice. We believe that the 384-well microtiter PCAD using the imaging analysis system will be a powerful sensor for multi-analytes at several categorized groups in real samples.
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Affiliation(s)
- Xiaojun Lyu
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Yui Sasaki
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Kohei Ohshiro
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Wei Tang
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Yousi Yuan
- The University of Tokyo: Tokyo Daigaku, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
| | - Tsuyoshi Minami
- The University of Tokyo, Institute of Industrial Science, 4-6-1 Komaba, 153-8505, Meguro-ku, JAPAN
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Xing G, Zhang W, Li N, Pu Q, Lin JM. Recent progress on microfluidic biosensors for rapid detection of pathogenic bacteria. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.08.073] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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20
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Scroccarello A, Della Pelle F, Del Carlo M, Compagnone D. Monitoring disinfection in the Covid-19 era. A reagent-free nanostructured smartphone-based device for the detection of oxidative disinfectants. Microchem J 2022. [DOI: 10.1016/j.microc.2021.107165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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21
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Buchanan BC, Yoon JY. Microscopic Imaging Methods for Organ-on-a-Chip Platforms. MICROMACHINES 2022; 13:328. [PMID: 35208453 PMCID: PMC8879989 DOI: 10.3390/mi13020328] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/15/2022] [Accepted: 02/15/2022] [Indexed: 02/06/2023]
Abstract
Microscopic imaging is essential and the most popular method for in situ monitoring and evaluating the outcome of various organ-on-a-chip (OOC) platforms, including the number and morphology of mammalian cells, gene expression, protein secretions, etc. This review presents an overview of how various imaging methods can be used to image organ-on-a-chip platforms, including transillumination imaging (including brightfield, phase-contrast, and holographic optofluidic imaging), fluorescence imaging (including confocal fluorescence and light-sheet fluorescence imaging), and smartphone-based imaging (including microscope attachment-based, quantitative phase, and lens-free imaging). While various microscopic imaging methods have been demonstrated for conventional microfluidic devices, a relatively small number of microscopic imaging methods have been demonstrated for OOC platforms. Some methods have rarely been used to image OOCs. Specific requirements for imaging OOCs will be discussed in comparison to the conventional microfluidic devices and future directions will be introduced in this review.
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Affiliation(s)
| | - Jeong-Yeol Yoon
- Department of Biomedical Engineering, The University of Arizona, Tucson, AZ 85721, USA;
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22
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Sun BR, Zhou AG, Li X, Yu HZ. Development and Application of Mobile Apps for Molecular Sensing: A Review. ACS Sens 2021; 6:1731-1744. [PMID: 33955727 DOI: 10.1021/acssensors.1c00512] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Modern smartphone-based sensing devices are generally standalone detection platforms that can transduce signals (via the built-in USB port, audio jack, or camera), perform analysis through mobile applications (apps), and display results on the screen/user interface. The advancement toward this ultimate form of on-site chemical analysis and point-of-care diagnosis is tied closely with the evolution of mobile technology. Previous reviews in the field mainly focused on the physical platforms while overlooking the role of mobile apps in such devices. There exist three general stages throughout the development: (1) early generation telemedicine, (2) mobile phone-assisted clinical diagnosis (without apps), and (3) mobile app-based sensing devices for various analytes. This review presents the key breakthroughs during each stage, recent development, remaining challenges, and future perspectives of the field. Representative examples, spanning from the pioneering point-of-care testing to the latest devices with integrated mobile apps, are classified by their sensing mechanisms. The review also discusses the scarcity of open-source apps dedicated to molecular sensing. With the introduction of more open-source and commercial apps, the mobile app-based detection system is anticipated to dominate point-of-care diagnosis and on-site molecular sensing in our opinion.
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Affiliation(s)
- Brigitta R. Sun
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Alvin G. Zhou
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Xiaochun Li
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P.R. China
| | - Hua-Zhong Yu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, P.R. China
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23
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Flow Control in Porous Media: From Numerical Analysis to Quantitative μPAD for Ionic Strength Measurements. SENSORS 2021; 21:s21103328. [PMID: 34064828 PMCID: PMC8150341 DOI: 10.3390/s21103328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/03/2021] [Accepted: 05/06/2021] [Indexed: 12/05/2022]
Abstract
Microfluidic paper-based analytical devices (µPADs) are a promising technology to enable accurate and quantitative in situ assays. Paper’s inherent hydrophilicity drives the fluids without the need for external pressure sources. However, controlling the flow in the porous medium has remained a challenge. This study addresses this problem from the nature of the paper substrate and its design. A computational fluid dynamic model has been developed, which couples the characteristics of the porous media (fiber length, fiber diameter and porosity) to the fluidic performance of the diffusion-based µPAD sensor. The numerical results showed that for a given porous membrane, the diffusion, and therefore the sensor performance is affected not only by the substrate nature but also by the inlets’ orientation. Given a porous substrate, the optimum performance is achieved by the lowest inlets’ angle. A diffusion-based self-referencing colorimetric sensor was built and validated according to the design. The device is able to quantify the hydronium concentration in wines by comparison to 0.1–1.0 M tartaric acid solutions with a 41.3 mM limit of detection. This research showed that by proper adjustments even the simplest µPADs can be used in quantitative assays for agri-food applications.
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24
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Ghodake GS, Shinde SK, Kadam AA, Saratale RG, Saratale GD, Syed A, Elgorban AM, Marraiki N, Kim DY. Biological characteristics and biomarkers of novel SARS-CoV-2 facilitated rapid development and implementation of diagnostic tools and surveillance measures. Biosens Bioelectron 2021; 177:112969. [PMID: 33434780 PMCID: PMC7836906 DOI: 10.1016/j.bios.2021.112969] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/30/2020] [Accepted: 01/02/2021] [Indexed: 01/08/2023]
Abstract
Existing coronavirus named as a severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has speeded its spread across the globe immediately after emergence in China, Wuhan region, at the end of the year 2019. Different techniques, including genome sequencing, structural feature classification by electron microscopy, and chest imaging using computed tomography, are primarily used to diagnose and screen SARS-CoV-2 suspected individuals. Determination of the viral structure, surface proteins, and genome sequence has provided a design blueprint for the diagnostic investigations of novel SARS-CoV-2 virus and rapidly emerging diagnostic technologies, vaccine trials, and cell-entry-inhibiting drugs. Here, we describe recent understandings on the spike glycoprotein (S protein), receptor-binding domain (RBD), and angiotensin-converting enzyme 2 (ACE2) and their receptor complex. This report also aims to review recently established diagnostic technologies and developments in surveillance measures for SARS-CoV-2 as well as the characteristics and performance of emerging techniques. Smartphone apps for contact tracing can help nations to conduct surveillance measures before a vaccine and effective medicines become available. We also describe promising point-of-care (POC) diagnostic technologies that are under consideration by researchers for advancement beyond the proof-of-concept stage. Developing novel diagnostic techniques needs to be facilitated to establish automatic systems, without any personal involvement or arrangement to curb an existing SARS-CoV-2 epidemic crisis, and could also be appropriate for avoiding the emergence of a future epidemic crisis.
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Affiliation(s)
- Gajanan Sampatrao Ghodake
- Department of Biological and Environmental Science, Dongguk University-Seoul, Medical Center Ilsan, Goyang-si, 10326, Gyeonggi-do, South Korea
| | - Surendra Krushna Shinde
- Department of Biological and Environmental Science, Dongguk University-Seoul, Medical Center Ilsan, Goyang-si, 10326, Gyeonggi-do, South Korea
| | - Avinash Ashok Kadam
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, 10326, Gyeonggi-do, South Korea
| | - Rijuta Ganesh Saratale
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, 10326, Gyeonggi-do, South Korea
| | - Ganesh Dattatraya Saratale
- Department of Food Science and Biotechnology, Dongguk University-Seoul, 32 Dongguk-ro, Ilsandong-gu, Goyang-si, 10326, Gyeonggi-do, South Korea
| | - Asad Syed
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455 Riyadh, 11451, Saudi Arabia
| | - Abdallah M Elgorban
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455 Riyadh, 11451, Saudi Arabia
| | - Najat Marraiki
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455 Riyadh, 11451, Saudi Arabia
| | - Dae-Young Kim
- Department of Biological and Environmental Science, Dongguk University-Seoul, Medical Center Ilsan, Goyang-si, 10326, Gyeonggi-do, South Korea.
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Komatsu T, Maeda R, Maeki M, Ishida A, Tani H, Tokeshi M. Dip-Type Paper-Based Analytical Device for Straightforward Quantitative Detection without Precise Sample Introduction. ACS Sens 2021; 6:1094-1102. [PMID: 33660502 DOI: 10.1021/acssensors.0c02367] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The development of low-cost, user-friendly paper-based analytical devices (PADs) that can easily measure target chemicals is attracting attention. However, most PADs require manipulation of the sample using sophisticated micropipettes for quantitative analyses, which restricts their user-friendliness. In addition, immobilization of detection molecules to cellulose fibers is essential for achieving good measuring ability as it ensures the homogeneity of color development. Here, we have described a dip-type PAD that does not require pipette manipulation for sample introduction and immobilization of detection molecules to cellulose fibers and its application to ascorbic acid (AA) and pH assays. The PAD consisted of a dipping area and two channels, each with two detection zones. The developed PADs show color distribution in the two detection zones depending on the sample flow from the dipping area. In comparison with a PAD that has one detection zone at the end of the channel, our developed device achieved higher sensitivity (limit of detection (LOD), 0.22 mg/mL) and reproducibility (maximum coefficient of variation (CV), 2.4%) in AA detection. However, in pH detection, the reproducibility of the PAD with one detection zone at the end of the channel (maximum CV, 21%) was worse than that with two zones (maximum CV, 11%). Furthermore, a dipping time over 3 s did not affect color formation or calibration curves in AA detection: LODs at 3 and 30 s dipping time were 18 and 5.8 μg/mL, respectively. The simultaneous determination of AA and pH in various beverages was performed with no significant difference compared to results of the conventional method.
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Affiliation(s)
- Takeshi Komatsu
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Sapporo 060-8628, Japan
| | - Ryoga Maeda
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Sapporo 060-8628, Japan
| | - Masatoshi Maeki
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita, Sapporo 060-8628, Japan
| | - Akihiko Ishida
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita, Sapporo 060-8628, Japan
| | - Hirofumi Tani
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita, Sapporo 060-8628, Japan
| | - Manabu Tokeshi
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita, Sapporo 060-8628, Japan
- Innovative Research Centre for Preventive Medical Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
- Institute of Nano-Life-Systems, Institute of Innovation for Future Society, Nagoya University, Furo-cho,
Chikusa, Nagoya 464-8601, Japan
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26
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Hou P, Deng R, Guo J, Chen W, Li X, Yu HZ. A WiFi scanner in conjunction with disposable multiplex paper assay for the quantitation of disease markers in blood plasma. Anal Bioanal Chem 2021; 413:4625-4634. [PMID: 33661349 DOI: 10.1007/s00216-021-03234-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/05/2021] [Accepted: 02/10/2021] [Indexed: 12/30/2022]
Abstract
Herein we report a quantitative, multiplex assay for disease markers in plasma based on an integrated setup of a portable scanner and a disposable paper-based analytical device (PAD). The quantitative analysis relies on the digital colorimetric reading of the three-layer PAD with 30 assay sites for performing respective chromogenic reactions for plasma uric acid, glucose, and triglyceride, which are considered as important risk factors for cardiovascular diseases. A portable scanner with WiFi transmission capability was used to produce high-quality color images of the PADs and wirelessly transfer them to a smartphone or other mobile devices for data processing. The concentrations of biomarkers in both standard solutions and plasma samples can be directly obtained using a custom-designed smartphone app that is also capable of constructing calibration curves. The detection limits of uric acid, glucose, and triglyceride were determined to be 0.50 mg/dL, 0.84 mmol/L, and 14 mg/dL, respectively, which are below the normal limits and adequate for clinical validation. Owing to the distinct advantages-simple, portable, and cost-effective-this mobile assay protocol can be used for point-of-care (POC) settings or resource-limited situations, and potentially for the diagnosis and prevention of infectious diseases.
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Affiliation(s)
- Pengfei Hou
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030606, Shanxi, China
| | - Rong Deng
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030606, Shanxi, China
| | - Jiqiang Guo
- Shanxi Bethune Hospital, Taiyuan, 030032, Shanxi, China
| | - Weiyi Chen
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030606, Shanxi, China
| | - Xiaochun Li
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030606, Shanxi, China.
| | - Hua-Zhong Yu
- College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan, 030606, Shanxi, China.
- Department of Chemistry and Department of Molecular Biology & Biochemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada.
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Kumbhakar P, Roy Karmakar A, Das GP, Chakraborty J, Tiwary CS, Kumbhakar P. Reversible temperature-dependent photoluminescence in semiconductor quantum dots for the development of a smartphone-based optical thermometer. NANOSCALE 2021; 13:2946-2954. [PMID: 33503086 DOI: 10.1039/d0nr07874c] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Photoluminescence (PL) intensity-based non-contact optical temperature sensors are in great demand due to their non-contact nature, rapid response, sensitivity, as well as thermal and chemical stability at different environmental conditions. However, herein, reversible temperature dependent PL emission quenching properties of chemically synthesized Mn2+-doped ZnS QDs (MZQDs) have been advantageously utilized for achieving the development of a smartphone-based optical thermometer. The temperature dependent variations of PL have been studied by taking MZQDs in various forms, such as in aqueous dispersion, powder form, and a polymer-encapsulated thin film. The origin of the PL quenching of MZQD in the polymer film has been cross-verified through temperature-dependent electrical conductivity measurement and the movement of charge carriers has also been confirmed by the first-principles DFT simulation. Through thermal cycling experiments on QD-encapsulated polymer film and by utilizing an indigenously-developed Android App based on color coordinates, a novel smartphone-based colorimetric imaging method for the measurement of temperature has been demonstrated in this work. The synthesized smart QDs might be suitable candidates for temperature sensing and the colorimetric thermometer probe may be utilized in various photonics applications as a smart optical sensor for daily life applications.
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Affiliation(s)
- Partha Kumbhakar
- Nanoscience Laboratory, Department of Physics, National Institute of Technology Durgapur, 713209, India.
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Progress in Rapid Detection Techniques Using Paper-Based Platforms for Food Safety. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1016/s1872-2040(20)60064-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Wei S, Li J, He J, Zhao W, Wang F, Song X, Xu K, Wang J, Zhao C. Paper chip-based colorimetric assay for detection of Salmonella typhimurium by combining aptamer-modified Fe 3O 4@Ag nanoprobes and urease activity inhibition. Mikrochim Acta 2020; 187:554. [PMID: 32902716 DOI: 10.1007/s00604-020-04537-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 08/28/2020] [Indexed: 12/31/2022]
Abstract
A rapid and sensitive colorimetric assay is described for Salmonella typhimurium (S. typhimurium) detection using urea/phenol red impregnated test paper. Aptamer-modified Fe3O4@Ag multifunctional hybrid nanoprobes (apt-Fe3O4@Ag NPs) were used to specifically captured S. typhimurium; the nanoprobes were quickly etched by H2O2 to form Ag+. The generated Ag+ can inhibit the urease-catalyzed hydrolysis reaction of urea to produce NH4+. Consequently, the as-prepared test paper displayed a yellow color. In the presence of S. typhimurium, the target bacteria can cause aggregation of apt-Fe3O4@Ag NPs, and the deposited Ag on the nanoprobe's surface is shielded against H2O2-induced oxidative decomposition leading to reduced Ag+ production. The catalytic activity of urease cannot be inhibited completely by inadequate amount of Ag+. An obvious color change from yellow to pink can be monitored directly using our test paper as a result of increased NH4+. The entire assay procedure could be completed within 1 h. A limit of detection of 48 cfu/mL is achieved with a linear range of 1 × 102 to 1 × 106 cfu/mL. The recoveries of S. typhimurium spiked in pure milk samples were 92.48-94.05%. Graphical abstract Schematic diagram of the proposed colorimetric assay for S. typhimurium detection based on etching of bifunctional apt-Fe3O4@Ag NPs and inhibiting catalytic activity of urease by Ag+. A color change from yellow to pink can be observed and correlated to the concentration of S. typhimurium.
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Affiliation(s)
- Shengnan Wei
- School of Public Health, Jilin University, Changchun, 130021, China
| | - Juan Li
- School of Public Health, Jilin University, Changchun, 130021, China.
| | - Jingya He
- School of Stomatology, Jilin University, Changchun, 130021, China
| | - Wei Zhao
- Jilin Provincial Center for Disease Control and Prevention, Changchun, 130062, China
| | - Feng Wang
- School of Stomatology, Jilin University, Changchun, 130021, China
| | - Xiuling Song
- School of Public Health, Jilin University, Changchun, 130021, China.,Public Health Detection Engineering Research Center of Jilin Province, Changchun, 130021, China
| | - Kun Xu
- School of Public Health, Jilin University, Changchun, 130021, China.,Public Health Detection Engineering Research Center of Jilin Province, Changchun, 130021, China
| | - Juan Wang
- School of Public Health, Jilin University, Changchun, 130021, China.
| | - Chao Zhao
- School of Public Health, Jilin University, Changchun, 130021, China.
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Nelis JLD, Zhao Y, Bura L, Rafferty K, Elliott CT, Campbell K. A Randomized Combined Channel Approach for the Quantification of Color- and Intensity-Based Assays with Smartphones. Anal Chem 2020; 92:7852-7860. [DOI: 10.1021/acs.analchem.0c01099] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Joost L. D. Nelis
- Institute for Global Food Security, School of Biological Sciences, Queen’s University of Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, United Kingdom
| | - Yunfeng Zhao
- Institute for Global Food Security, School of Biological Sciences, Queen’s University of Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, United Kingdom
- School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, 125 Stranmillis Road, Belfast BT9 5AH, United Kingdom
| | - Laszlo Bura
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A 43124, Parma, Italy
| | - Karen Rafferty
- School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, 125 Stranmillis Road, Belfast BT9 5AH, United Kingdom
| | - Christopher T. Elliott
- Institute for Global Food Security, School of Biological Sciences, Queen’s University of Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, United Kingdom
| | - Katrina Campbell
- Institute for Global Food Security, School of Biological Sciences, Queen’s University of Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, United Kingdom
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31
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Alba-Patiño A, Russell SM, Borges M, Pazos-Pérez N, Álvarez-Puebla RA, de la Rica R. Nanoparticle-based mobile biosensors for the rapid detection of sepsis biomarkers in whole blood. NANOSCALE ADVANCES 2020; 2:1253-1260. [PMID: 36133049 PMCID: PMC9418776 DOI: 10.1039/d0na00026d] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 01/21/2020] [Indexed: 05/22/2023]
Abstract
Detecting small variations in the levels of IL-6 is crucial for the early diagnosis of sepsis. To be useful in clinical decision-making, this requires detecting IL-6 rapidly in whole blood and with portable readers. Here we introduce immunosensors made of filter paper that use plasmonic nanoprobes to detect IL-6 rapidly in unprocessed blood with an unmodified smartphone. Key aspects of the biosensor fabrication were optimized in order to reduce the assay time without losing sensitivity. This included testing three bioconjugation routes for protein attachment to nanoprobes using gold nanoparticles covered with carboxylate or amine moieties, or polyvinylpyrrolidone (PVP), as starting materials, and using alternating layers of polyelectrolytes to bind the capture antibody to the paper substrate. Smartphone-based signal quantification was achieved with a custom-made app featuring a unique augmented reality guidance system that circumvents the need for smartphone attachments and automates all the steps involved in color quantification. The biosensors were able to detect IL-6 with a limit of detection of 0.1 pg mL-1 and a total assay time within 17 min. They could also detect an increase in IL-6 of only 12.5 pg mL-1 over basal levels in whole blood with 99% confidence. The high sensitivity and rapid turnaround time afforded by the optimized biosensors and the fully automated real-time densitometry app make our biosensors well suited for emergency healthcare situations such as the identification of potential sepsis cases.
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Affiliation(s)
- Alejandra Alba-Patiño
- Multidisciplinary Sepsis Group, Balearic Islands Health Research Institute (IdISBa), Son Espases University Hospital S Building, Carretera de Valldemossa 79 07120 Palma de Mallorca Spain
- Department of Chemistry, University of the Balearic Islands Carretera de Vallemossa km 7.5 07021 Palma de Mallorca Spain
| | - Steven M Russell
- Multidisciplinary Sepsis Group, Balearic Islands Health Research Institute (IdISBa), Son Espases University Hospital S Building, Carretera de Valldemossa 79 07120 Palma de Mallorca Spain
| | - Marcio Borges
- Multidisciplinary Sepsis Group, Balearic Islands Health Research Institute (IdISBa), Son Espases University Hospital S Building, Carretera de Valldemossa 79 07120 Palma de Mallorca Spain
| | - Nicolás Pazos-Pérez
- Department of Physical and Inorganic Chemistry and EMaS, Universitat Rovira i Virgili Carrer de Marcel.lí Domingo s/n 43007 Tarragona Spain
| | - Ramón A Álvarez-Puebla
- Department of Physical and Inorganic Chemistry and EMaS, Universitat Rovira i Virgili Carrer de Marcel.lí Domingo s/n 43007 Tarragona Spain
- ICREA Passeig Lluís Companys 23 08010 Barcelona Spain
| | - Roberto de la Rica
- Multidisciplinary Sepsis Group, Balearic Islands Health Research Institute (IdISBa), Son Espases University Hospital S Building, Carretera de Valldemossa 79 07120 Palma de Mallorca Spain
- Department of Chemistry, University of the Balearic Islands Carretera de Vallemossa km 7.5 07021 Palma de Mallorca Spain
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Katoh A, Maejima K, Hiruta Y, Citterio D. All-printed semiquantitative paper-based analytical devices relying on QR code array readout. Analyst 2020; 145:6071-6078. [DOI: 10.1039/d0an00955e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Colorimetric assay enabling user independent semiquantitative result readout through an array of sequentially unmasked QR codes.
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Affiliation(s)
- Aya Katoh
- Department of Applied Chemistry
- Keio University
- Yokohama 223-8522
- Japan
| | - Kento Maejima
- Department of Applied Chemistry
- Keio University
- Yokohama 223-8522
- Japan
| | - Yuki Hiruta
- Department of Applied Chemistry
- Keio University
- Yokohama 223-8522
- Japan
| | - Daniel Citterio
- Department of Applied Chemistry
- Keio University
- Yokohama 223-8522
- Japan
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Jung Y, Heo Y, Lee JJ, Deering A, Bae E. Smartphone-based lateral flow imaging system for detection of food-borne bacteria E.coli O157:H7. J Microbiol Methods 2020; 168:105800. [DOI: 10.1016/j.mimet.2019.105800] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 12/02/2019] [Accepted: 12/02/2019] [Indexed: 10/25/2022]
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34
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Nelis JLD, Bura L, Zhao Y, Burkin KM, Rafferty K, Elliott CT, Campbell K. The Efficiency of Color Space Channels to Quantify Color and Color Intensity Change in Liquids, pH Strips, and Lateral Flow Assays with Smartphones. SENSORS 2019; 19:s19235104. [PMID: 31766483 PMCID: PMC6928750 DOI: 10.3390/s19235104] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 11/14/2019] [Accepted: 11/19/2019] [Indexed: 01/26/2023]
Abstract
Bottom-up, end-user based feed, and food analysis through smartphone quantification of lateral flow assays (LFA) has the potential to cause a paradigm shift in testing capabilities. However, most developed devices do not test the presence of and implications of inter-phone variation. Much discussion remains regarding optimum color space for smartphone colorimetric analyses and, an in-depth comparison of color space performance is missing. Moreover, a light-shielding box is often used to avoid variations caused by background illumination while the use of such a bulky add-on may be avoidable through image background correction. Here, quantification performance of individual channels of RGB, HSV, and LAB color space and ΔRGB was determined for color and color intensity variation using pH strips, filter paper with dropped nanoparticles, and colored solutions. LAB and HSV color space channels never outperformed the best RGB channels in any test. Background correction avoided measurement variation if no direct sunlight was used and functioned more efficiently outside a light-shielding box (prediction errors < 5%/35% for color/color intensity change). The system was validated using various phones for quantification of major allergens (i.e., gluten in buffer, bovine milk in goat milk and goat cheese), and, pH in soil extracts with commercial pH strips and LFA. Inter-phone variation was significant for LFA quantification but low using pH strips (prediction errors < 10% for all six phones compared). Thus, assays based on color change hold the strongest promise for end-user adapted smartphone diagnostics.
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Affiliation(s)
- Joost Laurus Dinant Nelis
- Institute for Global Food Security, School of Biological Sciences, Queen’s University of Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK; (Y.Z.); (C.T.E.)
- Correspondence: (J.L.D.N.); (K.C.)
| | - Laszlo Bura
- Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy;
| | - Yunfeng Zhao
- Institute for Global Food Security, School of Biological Sciences, Queen’s University of Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK; (Y.Z.); (C.T.E.)
- School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, 125 Stranmillis Road, Belfast BT9 5AH, UK;
| | - Konstantin M. Burkin
- Faculty of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye Gory, GSP-1, Moscow 119991, Russia;
| | - Karen Rafferty
- School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, 125 Stranmillis Road, Belfast BT9 5AH, UK;
| | - Christopher T. Elliott
- Institute for Global Food Security, School of Biological Sciences, Queen’s University of Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK; (Y.Z.); (C.T.E.)
| | - Katrina Campbell
- Institute for Global Food Security, School of Biological Sciences, Queen’s University of Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, UK; (Y.Z.); (C.T.E.)
- Correspondence: (J.L.D.N.); (K.C.)
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35
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Malekjahani A, Sindhwani S, Syed AM, Chan WCW. Engineering Steps for Mobile Point-of-Care Diagnostic Devices. Acc Chem Res 2019; 52:2406-2414. [PMID: 31430118 DOI: 10.1021/acs.accounts.9b00200] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Mobile phone technology is a perfect companion for point-of-care diagnostics as they come equipped with advanced processors, high resolution cameras, and network connectivity. Despite several academic pursuits, only a few mobile phone diagnostics have been tested in the field, commercialized or achieved regulatory approval. This review will address the challenges associated with developing mobile diagnostics and suggest strategies to overcome them. We aim to provide a resource for researchers to accelerate the development of new diagnostics. Our Account includes an overview of published mobile phone diagnostics and highlights lessons learned from their approach to diagnostic development. Also, we have included recommendations from regulatory and public health agencies, such as the U.S. Food and Drug Administration and World Health Organization, to further guide researchers. We believe that the development of mobile phone point-of-care diagnostics takes place in four distinct steps: (1) Needs and Value Assessment, (2) Technology Development, (3) Preclinical Verification, and (4) Clinical Validation and Field Trials. During each step, we outline developmental strategies to help researchers avoid potential challenges. (1) Researchers commonly develop devices to maximize technical parameters such as sensitivity and time which do not necessarily translate to increased clinical impact. Researchers must focus on assessing specific diagnostic needs and the value which a potential device would offer. (2) Often, researchers claim they have developed devices for feasible implementation at the point-of-care, yet they rely on laboratory resources. Researchers must develop equipment-free devices which are agnostic to any mobile phone. (3) Another challenge researchers face is decreased performance during field evaluations relative to initial laboratory verification. Researchers must ensure that they simulate the field conditions during laboratory verification to achieve successful translation. (4) Finally, proper field testing of devices must be performed in conditions which match that of the final intended use. The future of mobile phone point-of-care diagnostic devices is bright and has the potential to radically change how patients are diagnosed. Before we reach this point, researchers must take a step backward and focus on the first-principles of basic research. The widespread adoption and rapid scaling of these devices can only be achieved once the fundamentals have been considered. The insights and strategies provided here will help researchers avoid pitfalls, streamline development and make better decisions during the development of new diagnostics. Further, we believe this Account can help push the field of mobile diagnostics toward increased productivity, leading to more approved devices and ultimately helping curb the burden of disease worldwide.
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Affiliation(s)
- Ayden Malekjahani
- Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, 164 College St, Toronto, ON M5S 3G9, Canada
| | - Shrey Sindhwani
- Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, 164 College St, Toronto, ON M5S 3G9, Canada
| | - Abdullah Muhammad Syed
- Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, 164 College St, Toronto, ON M5S 3G9, Canada
| | - Warren C. W. Chan
- Institute of Biomaterials and Biomedical Engineering (IBBME), University of Toronto, 164 College St, Toronto, ON M5S 3G9, Canada
- Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St, Toronto, ON M5S 3E5, Canada
- Department of Chemistry, University of Toronto, 80 St. George, Toronto, ON M5S 3H6, Canada
- Faculty of Applied Science and Engineering, University of Toronto, Toronto, ON M5S 1A4, Canada
- Donnelly Center for Cellular and Biomolecular Research, University of Toronto, 160 College St, Toronto, ON M5S 3E1, Canada
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Lim H, Jafry AT, Lee J. Fabrication, Flow Control, and Applications of Microfluidic Paper-Based Analytical Devices. Molecules 2019; 24:E2869. [PMID: 31394856 PMCID: PMC6721703 DOI: 10.3390/molecules24162869] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 11/20/2022] Open
Abstract
Paper-based microfluidic devices have advanced significantly in recent years as they are affordable, automated with capillary action, portable, and biodegradable diagnostic platforms for a variety of health, environmental, and food quality applications. In terms of commercialization, however, paper-based microfluidics still have to overcome significant challenges to become an authentic point-of-care testing format with the advanced capabilities of analyte purification, multiplex analysis, quantification, and detection with high sensitivity and selectivity. Moreover, fluid flow manipulation for multistep integration, which involves valving and flow velocity control, is also a critical parameter to achieve high-performance devices. Considering these limitations, the aim of this review is to (i) comprehensively analyze the fabrication techniques of microfluidic paper-based analytical devices, (ii) provide a theoretical background and various methods for fluid flow manipulation, and iii) highlight the recent detection techniques developed for various applications, including their advantages and disadvantages.
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Affiliation(s)
- Hosub Lim
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Korea
| | - Ali Turab Jafry
- Faculty of Mechanical Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi 23640, Pakistan.
| | - Jinkee Lee
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Korea.
- Institute of Quantum Biophysics, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Korea.
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