Nanoporous Silica-Dye Microspheres for Enhanced Colorimetric Detection of Cyclohexanone

Li, Zheng

doi:10.3390/chemosensors6030034

Cited by 12 publications

(6 citation statements)

References 52 publications

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“…The presence of kanamycin resulted in the separation of the aptamer sequence from its complementary strand, which consequently uncovered the pores and led to the release of Rhodamine B. Therefore, the fluorescence intensity increased significantly, and the relative fluorescence intensity exhibited a linearity range between 24.75 nM and 137.15 nM of kanamycin and a detection limit of 7.5 nM [152].…”

Section: Fluorescent Sensingmentioning

confidence: 99%

Mesoporous Silica Platforms with Potential Applications in Release and Adsorption of Active Agents

et al. 2020

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In recent years, researchers focused their attention on mesoporous silica nanoparticles (MSNs) owing to the considerable advancements of the characterization methods, especially electron microscopy methods, which allowed for a clear visualization of the pore structure and the materials encapsulated within the pores, along with the X-ray diffraction (small angles) methods and specific surface area determination by Brunauer–Emmett–Teller (BET) technique. Mesoporous silica gained important consideration in biomedical applications thanks to its tunable pore size, high surface area, surface functionalization possibility, chemical stability, and pore nature. Specifically, the nature of the pores allows for the encapsulation and release of anti-cancer drugs into tumor tissues, which makes MSN ideal candidates as drug delivery carriers in cancer treatment. Moreover, the inner and outer surfaces of the MSN provide a platform for further functionalization approaches that could enhance the adsorption of the drug within the silica network and the selective targeting and controlled release to the desired site. Additionally, stimuli-responsive mesoporous silica systems are being used as mediators in cancer therapy, and through the release of the therapeutic agents hosted inside the pores under the action of specific triggering factors, it can selectively deliver them into tumor tissues. Another important application of the mesoporous silica nanomaterials is related to its ability to extract different hazardous species from aqueous media, some of these agents being antibiotics, pesticides, or anti-tumor agents. The purpose of this paper is to analyze the methods of MSN synthesis and related characteristics, the available surface functionalization strategies, and the most important applications of MSN in adsorption as well as release studies. Owing to the increasing antibiotic resistance, the need for developing materials for antibiotic removal from wastewaters is important and mesoporous materials already proved remarkable performances in environmental applications, including removal or even degradation of hazardous agents such as antibiotics and pesticides.

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Section: Fluorescent Sensingmentioning

confidence: 99%

Mesoporous Silica Platforms with Potential Applications in Release and Adsorption of Active Agents

et al. 2020

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“…Thanks to the pretty good results, this device has the potential to further progress for easy-touse and low-cost sensing applications. A colorimetric sensor is developed for the sensitive gas detection of cyclohexanone, a volatile marker of some explosives, such as RDX (1,3,5-trinitro-1,3,5-triazinane) and HMX (1,3,5,7-tetranitro-1,3,5,7-tetrazocane) [99]. It consists of silica-dye composite microspheres prepared using ultrasonic and aerosol−gel synthesis, comprising the hydrolysis of ultrasonically sprayed organosiloxanes at 150 °C , with the adding of the ketone-responsive indicator dye, pararosaniline.…”

Section: Int J Environ Res Public Health 2020 17 Xmentioning

confidence: 99%

Disposable and Low-Cost Colorimetric Sensors for Environmental Analysis

Alberti

Zanoni

Magnaghi

et al. 2020

IJERPH

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Environmental contamination affects human health and reduces the quality of life. Therefore, the monitoring of water and air quality is important, ensuring that all areas are acquiescent with the current legislation. Colorimetric sensors deliver quick, naked-eye detection, low-cost, and adequate determination of environmental analytes. In particular, disposable sensors are cheap and easy-to-use devices for single-shot measurements. Due to increasing requests for in situ analysis or resource-limited zones, disposable sensors’ development has increased. This review provides a brief insight into low-cost and disposable colorimetric sensors currently used for environmental analysis. The advantages and disadvantages of different colorimetric devices for environmental analysis are discussed.

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“…These devices can also provide qualitative or quantitative results and data at the point of care without the need for specialized equipment or power sources. Several paper-based devices have been developed for various applications, such as for water analysis [1][2][3][4], biomedical applications [5,6], food analysis [7][8][9][10], soil analysis [11] and many other miscellaneous applications [12][13][14][15]. The field of paper-based microfluidics is expected to continue garnering greater attention as more applications are sought after or the performance improved for the ones already developed [16].…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Determination of Nitrate after Reduction to Nitrite in a Paper-Based Dip Strip

Charbaji

Heidari-Bafroui

Rahmani

et al. 2021

The 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry

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Paper-based microfluidic technology is a relatively new field of research that provides low-cost platforms and sensors for point-of-care diagnostics. While the majority of research in this field has been for biomedical applications, more and more paper-based devices and platforms are being designed and developed for environmental applications, such as water quality monitoring and assessment. One such application is the detection of nitrate in water samples. Colorimetric detection of nitrate by paper-based devices using the Griess assay requires the reduction of nitrate to nitrite before undergoing the reaction. In this paper, we measured the performance of a paper-based dip strip for detecting nitrate and nitrite by calculating its limit of detection and limit of quantification. We also calculated the reduction efficiency of vanadium (III) chloride in the dip strip for detecting nitrate. Our results show that the reduction time of nitrate via vanadium (III) chloride is much longer than that when using zinc microparticles. Our results also show that the performance of the dip strip using vanadium (III) chloride for nitrate detection is not as good as more intricate paper-based devices that have a separate reaction zone with zinc microparticles. The limits of detection and quantification calculated were 3.352 and 7.437 ppm, and the nitrate reduction efficiency varied over the range of nitrate concentrations tested.

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Nanoporous Silica-Dye Microspheres for Enhanced Colorimetric Detection of Cyclohexanone

Cited by 12 publications

References 52 publications

Mesoporous Silica Platforms with Potential Applications in Release and Adsorption of Active Agents

Mesoporous Silica Platforms with Potential Applications in Release and Adsorption of Active Agents

Disposable and Low-Cost Colorimetric Sensors for Environmental Analysis

Colorimetric Determination of Nitrate after Reduction to Nitrite in a Paper-Based Dip Strip

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