Optical sensor for pH monitoring using a layer-by-layer deposition technique emphasizing enhanced stability and re-usability

Raoufi, Nahid; Surre, F.; Rajarajan, Muttukrishnan; Sun, Tao; Grattan, K. T. V.

doi:10.1016/j.snb.2014.01.080

Cited by 10 publications

(3 citation statements)

References 40 publications

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“…This precision was attained while maintaining BY and PAH solution concentrations at 0.25 mM and 2.5 mM, respectively. In another study [106], they focused on improving the stability and re-usability of optical pH sensors by employing a LbL deposition technique. The team compared three stabilization methods: heat treatment, and the application of PAH/SiO 2 and APTMS/SiO 2 bilayers.…”

Section: Optical Sensorsmentioning

confidence: 99%

Advancements in Polymer-Assisted Layer-by-Layer Fabrication of Wearable Sensors for Health Monitoring

Jin,

Shi,

Sun

et al. 2024

Sensors

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Recent advancements in polymer-assisted layer-by-layer (LbL) fabrication have revolutionized the development of wearable sensors for health monitoring. LbL self-assembly has emerged as a powerful and versatile technique for creating conformal, flexible, and multi-functional films on various substrates, making it particularly suitable for fabricating wearable sensors. The incorporation of polymers, both natural and synthetic, has played a crucial role in enhancing the performance, stability, and biocompatibility of these sensors. This review provides a comprehensive overview of the principles of LbL self-assembly, the role of polymers in sensor fabrication, and the various types of LbL-fabricated wearable sensors for physical, chemical, and biological sensing. The applications of these sensors in continuous health monitoring, disease diagnosis, and management are discussed in detail, highlighting their potential to revolutionize personalized healthcare. Despite significant progress, challenges related to long-term stability, biocompatibility, data acquisition, and large-scale manufacturing are still to be addressed, providing insights into future research directions. With continued advancements in polymer-assisted LbL fabrication and related fields, wearable sensors are poised to improve the quality of life for individuals worldwide.

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Section: Optical Sensorsmentioning

confidence: 99%

Advancements in Polymer-Assisted Layer-by-Layer Fabrication of Wearable Sensors for Health Monitoring

Jin,

Shi,

Sun

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

“…This sequence is repeated until the desired number of bilayers is reached. Using results from previous studies, the films were fabricated with a PAH cap layer [18,19,24,27]. This final layer has been demonstrated to protect and extend functionality of the film as a pH sensor when immersed in high pH values up to 8.7.…”

Section: Film Assemblymentioning

confidence: 99%

“…However, few of these films have been studied at high temperatures, up to 100 • C, where degradation of the dye or of the film can occur. [14,18,19]. Little information exists about the large area morphology at temperatures other than room temperature.…”

Section: Introductionmentioning

confidence: 99%

Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations

Topasna

2019

Coatings

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There are numerous applications for thin films based chemical pH sensors, in such areas as biomedical, military, environmental, food, and consumer products. pH sensitive films fabricated through the ionic self-assembled monolayers technique were made of polyelectrolyte polyallylamine hydrochloride and the water-soluble organic dye molecule Direct Yellow 4. The films were monitored in various environmental conditions and for selected periods, at temperatures varying between −13.7 and 46.2 °C. Absorbance measurements and atomic force microscopy performed before and after thermal treatment indicate that for optimized thickness and composition the films maintain their functionality and are not affected by long-term exposure at these temperatures.

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Nanostructured Polymer Composites for Water Remediation

Akharame

Oputu

Pereao

et al. 2019

Nanostructured Materials for Treating Aquatic Pollution

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Optical sensor for pH monitoring using a layer-by-layer deposition technique emphasizing enhanced stability and re-usability

Cited by 10 publications

References 40 publications

Advancements in Polymer-Assisted Layer-by-Layer Fabrication of Wearable Sensors for Health Monitoring

Advancements in Polymer-Assisted Layer-by-Layer Fabrication of Wearable Sensors for Health Monitoring

Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations

Nanostructured Polymer Composites for Water Remediation

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