Automatic quantification of living cells via a non-invasive achromatic colorimetric sensor through machine learning-assisted image analysis using a smartphone

Jung, Do Hyeon; Kim, Yunchul; Cho, Hui Hun; Lee, Byoungsang; Suh, Su‐Jeong; Heo, Jun Hyuk; Lee, Jung Heon

doi:10.1016/j.cej.2022.138281

Cited by 8 publications

(4 citation statements)

References 64 publications

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“…SO 2 sensitive CP was selected from several candidates such as metal nanoparticles, 47 chromophores, 5 fluorescent and colloidal crystals, 48 which were commonly used as optical materials in many studies. Carbon‐based materials, such as carbon dots have been recently studied for catalysis, 49 optoelectronics, 50 and anti‐counterfeiting applications 51 based on various advantages such as tunable photoluminescence (PL), high quantum yield, low toxicity, and biocompatibility 52–54 .…”

Section: Resultsmentioning

confidence: 99%

“…In order to overcome this, many low‐power, high‐efficiency color analysis devices have recently been developed, and a digital colorimetric sensor combining them with colorimetric sensors enables significantly high sensitivity and quantifiability 1,2 . Accordingly, digital colorimetric sensor extends the use of colorimetric sensors for a wide range of applications including optoelectronic nose, 3 DNA and protein detection, 4 live cell quantification, 5 and gas monitoring 6–8 . In particular, since most energy systems use a variety of gases on a large scale, a real‐time gas monitoring technology is essential to implement a high‐efficiency green energy system and safety management 9–11 …”

Section: Introductionmentioning

confidence: 99%

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Digital colorimetric sensing for real‐time gas monitoring for smart green energy system

Cho

Dutta

Kwak

et al. 2023

EcoMat

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In this study, we demonstrate that a digital colorimetric sensor platform can transform a conventional energy system, such as gas‐insulated switchgear (GIS) into a smart green energy system. Our sensor platform consists of a colorimetric sensor film (CSF), an array of silicon photodiodes, and a low‐power‐driven fiber optical photodiode with a wireless communication protocol integrated into an information network. The photodiode measures the transmitted light of the color‐variable CSF when exposed to sulfur dioxide (SO2) gas, a decomposition by‐product of the sulfur hexafluoride (SF6) gas in GIS. We report the electrical photocurrent measurement through the CSF can measure the concentration of SO2 gas via remote and real‐time monitoring and shows a comparable behavior to UV–Vis absorption measurement. The limit of detection of the sensor, 0.78 ppm is sufficient to analyze the GIS insulation deterioration allowing green energy systems.image

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Digital colorimetric sensing for real‐time gas monitoring for smart green energy system

Cho

Dutta

Kwak

et al. 2023

EcoMat

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“…AuNPs are advantageous as colorimetric transducers for water pollutant detection as they exhibit relatively low cost, low toxicity, high stability, facile processability, and unique optical properties. In general, colorimetric sensors do not require bulky and expensive analysis instruments such as Fourier transform infrared spectroscopy or Raman spectroscopy. − From that point of view, metal nanomaterials, including AuNPs, have been commonly used as sensing probes in the food, pharmaceutical, environmental, and biological fields due to their cost effectiveness . For example, research has shown that arsenic(V) can be detected inexpensively ($0.03 per test) using a colorimetric dipstick method .…”

Section: Advantages Of Aunps As Colorimetric Transducers For Water Po...mentioning

confidence: 99%

Gold Nanoparticles as Exquisite Colorimetric Transducers for Water Pollutant Detection

Cho

Jung

Heo

et al. 2023

ACS Appl. Mater. Interfaces

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Gold nanoparticles (AuNPs) are useful nanomaterials as transducers for colorimetric sensors because of their high extinction coefficient and ability to change color depending on aggregation status. Therefore, over the past few decades, AuNP-based colorimetric sensors have been widely applied in several environmental and biological applications, including the detection of water pollutants. According to various studies, water pollutants are classified into heavy metals or cationic metal ions, toxins, and pesticides. Notably, many researchers have been interested in AuNP that detect water pollutants with high sensitivity and selectivity, while offering no adverse environmental issues in terms of AuNP use. This review provides a representative overview of AuNP-based colorimetric sensors for detecting several water pollutants. In particular, we emphasize the advantages of AuNP as colorimetric transducers for water pollutant detection in terms of their low toxicity, high stability, facile processability, and unique optical properties. Next, we discuss the status quo and future prospects of AuNP-based colorimetric sensors for the detection of water pollutants. We believe that this review will promote research and development of AuNP as next-generation colorimetric transducers for water pollutant detection.

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“…Colorimetric sensors have long been the focus of research studies due to their ability to perform simple, rapid, portable, low-cost, real-time, and nondestructive detection of analytes without complex instrumentation. Thus, colorimetric sensors are becoming widely used for safety and quality monitoring in a variety of industrial processes, such as bioanalytical chemistry, manufacturing, environmental, agriculture, warehousing, food safety, etc. − Colorimetric sensors aim to detect subtle changes by converting the relevant chemical or physical properties (i.e., temperature, pH value, or molecules) of molecular or ionic species into visible color changes that can be observed by the naked eye. Many efforts have therefore gone into the development of colorimetric sensor systems.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Sensor Based on Ag-Fe NTs for H₂S Sensing

Huang

Tian

et al. 2022

ACS Omega

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Meat waste is widely associated with spoilage caused by microbial growth and metabolism. Volatile compounds produced by microbial growth such as volatile sulfides could directly indicate the freshness of meat during distribution and storage. Herein, silver−iron nanotriangles (Ag-Fe NTs) for hydrogen sulfide (H 2 S) detection were developed via one-pot facile reflux reactions. The Ag-Fe NTs were integrated into food packaging systems for the rapid, real-time, and nondestructive detection of the freshness of chilled broiler poultry. The principle of color development is that an increase in the volatile sulfide content leads to a change in the absorption wavelength caused by the etching of the Ag-Fe NTs, resulting in a color change (yellow to brown). The minimum H 2 S concentrations detected by the naked eye and UV−vis spectrophotometer were 4 and 2 mg/m 3 , respectively. This label is economical and practical and can monitor the spoilage of chilled broiler meat products in real-time.

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Automatic quantification of living cells via a non-invasive achromatic colorimetric sensor through machine learning-assisted image analysis using a smartphone

Cited by 8 publications

References 64 publications

Digital colorimetric sensing for real‐time gas monitoring for smart green energy system

Digital colorimetric sensing for real‐time gas monitoring for smart green energy system

Gold Nanoparticles as Exquisite Colorimetric Transducers for Water Pollutant Detection

Colorimetric Sensor Based on Ag-Fe NTs for H₂S Sensing

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Automatic quantification of living cells via a non-invasive achromatic colorimetric sensor through machine learning-assisted image analysis using a smartphone

Cited by 8 publications

References 64 publications

Digital colorimetric sensing for real‐time gas monitoring for smart green energy system

Digital colorimetric sensing for real‐time gas monitoring for smart green energy system

Gold Nanoparticles as Exquisite Colorimetric Transducers for Water Pollutant Detection

Colorimetric Sensor Based on Ag-Fe NTs for H2S Sensing

Contact Info

Product

Resources

About

Colorimetric Sensor Based on Ag-Fe NTs for H₂S Sensing