Article
Chemistry, Analytical
Swati Mohanty, Gajendranath Chowdary, Shiv Govind Singh
Summary: This paper presents a portable, label-free chemiresistive sensor for the selective detection of lead (Pb) ions in water. The sensor exhibits high selectivity and can be analyzed quickly using a smartphone interface. The results show that the sensor can successfully detect the presence of lead ions even at a concentration as low as 100 pico Molar (pM). In addition, a machine learning algorithm is used to enhance data analysis and assist in classification.
MICROCHEMICAL JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Sohan Dudala, Satish Kumar Dubey, Arshad Javed, Anasuya Ganguly, Suman Kapur, Sanket Goel
Summary: This study developed a portable and cost-effective chemiluminescence quantification platform for the detection and quantification of creatinine in blood serum. The platform utilizes a camera sensor and a raspberry-pi single board computer to capture and analyze chemiluminescence signals. The system proved effective in detecting creatinine, a primary indicator of renal health.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Environmental
Jie Cao, Yingying Liu, Shiquan Xiong, Qiao Cao, Shihao Xu, Changlong Jiang
Summary: A new probe solution and test paper have been developed for visual detection of ammonium, which can perform colorimetric change for high-concentration ammonium and ratiometric fluorescence response for low-concentration ammonium. It has great application potential for on-site detection of ammonium in environmental samples.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Analytical
Meng Wu, Ting Liu, Chenhui Yin, Xinxin Jiang, Qijun Sun, Lei Gao, Na Niu, Ligang Chen, Huixin Gang
Summary: In this study, a smartphone-assisted RGB-dependent TC-PBQ ratiometric sensing platform was introduced for rapid recognition. The red-emitting mercaptopropionic acid-capped CdTe quantum dots can be quenched by TC-PBQ, while the blue-emitting carbon dots as the reference signal remain unchanged. The sensing platform has a limit of detection of 59 nM in aqueous solution. By constructing an analysis model with the system RGB value, the smartphone-assisted sensor-coated fluorescent test paper can complete the qualitative and quantitative visual detection of TC-PBQ (LOD is 93 nM). The applicability of smartphone-dependent RGB analysis significantly simplifies and speeds up the operation process, providing a new analytical method for real-time analysis of TC-PBQ in real samples.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jingjing Liu, Yuanjin Zhan, Bin Qiu, Zhenyu Lin, Longhua Guo
Summary: The development of an instrument-free, on-site, real-time, sensitive, and visualized fluoride-ion (F-) content rapid detection strategy is crucial to ensuring the health of the population. A smartphone sensing platform based on a ratiometric fluorescent probe was developed for the detection of F-. The platform features low cost, portability, easy operation, and good stability, selectivity, and repeatability, providing a powerful tool for visual quantitative detection in various fields.
Article
Nanoscience & Nanotechnology
Xingzhen Li, Lei Pan, Fan Yang, Liang Yang
Summary: In this study, a portable smartphone platform based on ratiometric fluorescent nanoprobes was designed for the rapid, real-time, and sensitive detection of copper ions in tea and tea beverages. The method showed high sensitivity, good selectivity, and strong anti-interference ability. The combination of the fluorescent nanoprobes and smartphones allowed for visual analysis and provided a convenient method for on-site and visual inspection of tea and tea beverages.
ACS APPLIED NANO MATERIALS
(2022)
Article
Biophysics
Qiangqiang Fu, Tao Qi, Ze Wu, Yongjian He, Shujuan Guan, Shihua Luo, Qi Zhang, Wenfeng Luo, Wei Xiao, Bo Situ, Lei Zheng
Summary: This study presents a portable and affordable smartphone-based Hb analyzer for quick anemia testing, especially suitable for high-risk patients in areas with limited medical resources.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Applied
Junning Ma, Yue Guan, Fuguo Xing, Yan Wang, Xu Li, Qiang Yu, Xiaohua Yu
Summary: To detect aflatoxin B1 (AFB1) in foodstuffs on-site, we developed a smartphone-based chemiluminescence detection method using both labelled and label-free modes. The labelled mode achieved a detection limit of 0.04 ng/mL and a linear range of 1-100 ng/mL through double streptavidin-biotin mediated signal amplification. To simplify the system, a label-free mode was fabricated using split aptamer and split DNAzyme, which achieved a satisfactory detection limit of 0.33 ng/mL in the same linear range. Both systems showed excellent recovery rates in AFB1-spiked maize and peanut kernel samples. The integration of these systems into a smartphone-based portable device allowed for comparable AFB1 detection ability to a commercial microplate reader. These systems have great potential for on-site AFB1 detection in the food supply chain.
Article
Chemistry, Multidisciplinary
Zhe Jiao, Zongning Guo, Xuelin Huang, Jialing Yang, Jianxiang Huang, Yong Liu, Guozhen Liu, Pengfei Zhang, Chao Song, Ben Zhong Tang
Summary: The study presents a portable 3D-printed fluorescent sensing platform for smartphone detection of organophosphorus residues in vegetables. By utilizing thiol-activated fluorescence and gray value analysis, a linear relationship between different concentrations of organophosphorus residues can be achieved.
Article
Chemistry, Analytical
Hyun Tae Kim, Enjian Jin, Min-Ho Lee
Summary: In this study, a portable chemiluminescence-based lateral flow assay platform was developed for the detection of cortisol in human serum. The platform showed high sensitivity and accuracy for measuring cortisol levels and could be a cost-effective alternative to optical devices.
Article
Chemistry, Analytical
Zhihao Yi, Yashuang Ren, Yang Li, Feng Long, Anna Zhu
Summary: A portable and reusable optical fiber chemiluminescence biosensing platform (OFCBP) was developed for rapid and on-site detection of Aflatoxin B1 (AFB1) using optical fiber as biorecognition probe and chemiluminescence signal transducer. The OFCBP demonstrated ultrasensitive quantification of AFB1 with a linear detection range of 0.67 - 100 ng/mL and a limit of detection of 0.075 ng/mL. The robustness of the biosensor surface allowed multiple AFB1 bioassays with little activity loss. This OFCBP system offers a reliable and convenient method for rapid on-site detection of various targets in different fields.
MICROCHEMICAL JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Yolanda Alacid, Maria Jose Martinez-Tome, Rocio Esquembre, M. Antonia Herrero, C. Reyes Mateo
Summary: In this study, alkaline phosphatase (ALP) was incorporated into a three-dimensional polymeric network through a green protocol to obtain transparent hydrogels (ALP@AETA). The immobilized enzyme retained its activity, slightly increased its thermal stability, and could be stored as a xerogel at room temperature. The ALP@AETA xerogel showed promise as a disposable biosensor for detecting ALP inhibitors.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Environmental
Xueyan Liu, Zhuo Chen, Rongsheng Gao, Chengyou Kan, Jianhong Xu
Summary: Technological advances have enabled the development of a portable and simplified colorimetric method for Fe3+ sensing using a smartphone as a detector. The study successfully prepared a fluorescent and colorimetric sensor for Fe3+ using rhodamine-grafted cellulose filter paper, and developed a smartphone app for convenient and on-site quantitative detection of Fe3+ in environmental water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Analytical
Chaonan He, Xiaorong Liu, Mengmeng Yu, Zhuang Qiu, Tong Huang, Weichang Xie, Haoxin Cheng, Yifei Yang, Xian Hao, Xiaolei Wang
Summary: A portable platform for quantitative detection of viral DNA based on fluorescence resonance energy transfer (FRET) principle is constructed using upconversion nanoparticles (UCNPs) and graphene oxide nanosheets (GOs). The sensitivity and detection limit are improved by modifying GOs with magnetic nanoparticles to prepare magnetic graphene oxide nanosheets (MGOs). A carrier chip based on photonic crystals (PCs) is introduced to achieve visual solid-phase detection and amplify the luminescence intensity. With the 3D printed accessory and smartphone program, this portable detection provides a high-quality viral detection strategy and clinical diagnosis method.
Article
Chemistry, Analytical
Priya Yadav, Lalita Yadav, Harshita Laddha, Madhu Agarwal, Ragini Gupta
Summary: Ions are important for biological processes, but high levels can pose health risks. Researchers have developed smartphone-based techniques for continuous monitoring, providing a cost-effective and user-friendly way to detect and monitor ions in various samples.
TRENDS IN ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
