Janus particles and motors: unrivaled devices for mastering (bio)sensing

Jurado‐Sánchez, Beatriz; Campuzano, Susana; Pingarrón, José M.; Escarpa, Alberto

doi:10.1007/s00604-021-05053-z

Cited by 19 publications

(16 citation statements)

References 101 publications

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“…The above advantages (or possible advantages) of catalytic micromotors as sensors are currently explored by research groups worldwide and were highlighted in a good number of papers. The present (focused and thorough) overview of the catalytic micromotors used to detect and quantify analytes of interest complements several recent reviews about sensing with micromotors [28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 88%

Analyte Sensing with Catalytic Micromotors

Popescu

Gáspár

2022

Biosensors

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Catalytic micromotors can be used to detect molecules of interest in several ways. The straightforward approach is to use such motors as sensors of their “fuel” (i.e., of the species consumed for self-propulsion). Another way is in the detection of species which are not fuel but still modulate the catalytic processes facilitating self-propulsion. Both of these require analysis of the motion of the micromotors because the speed (or the diffusion coefficient) of the micromotors is the analytical signal. Alternatively, catalytic micromotors can be used as the means to enhance mass transport, and thus increase the probability of specific recognition events in the sample. This latter approach is based on “classic” (e.g., electrochemical) analytical signals and does not require an analysis of the motion of the micromotors. Together with a discussion of the current limitations faced by sensing concepts based on the speed (or diffusion coefficient) of catalytic micromotors, we review the findings of the studies devoted to the analytical performances of catalytic micromotor sensors. We conclude that the qualitative (rather than quantitative) analysis of small samples, in resource poor environments, is the most promising niche for the catalytic micromotors in analytical chemistry.

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Section: Introductionmentioning

confidence: 88%

Analyte Sensing with Catalytic Micromotors

Popescu

Gáspár

2022

Biosensors

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“…Unique JPs performed a sensitive detection and proper removal of lead (II) ions as well as being convenient for easy manipulation and magnetic field application for washing, solvent exchange and stirring which are the key elements of an enhanced sensitivity and fast detection for environmental and waste‐water applications. Nature‐derived biopolymers such as alginate, cellulose and chitosan were overviewed to be used for biosensing and electrochemical detection purposes as processed into JPs and their recent application potentials for biological applications were discussed [27]. In another study, alginate polymers were used to fabricate complex structures, not as a particle but fibers, that had Janus morphologies to be utilized as controlled delivery vehicles [28].…”

Section: Bio‐based Polymers To Fabricate Janus Structuresmentioning

confidence: 99%

Potential use of Janus structures in food applications

Subaşı

Xiao

Capanoglu

2021

eFood

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Janus surfaces present technological opportunities both for research and industry in which different chemical, physical and/or structural components need to coexist for a single purpose such as chemistry, textile and material science. Varying inorganic and organic (polymer-based) materials are conventionally used however, utilizing nature-derived polymers to fabricate Janus structures is a recent and attractive trend which makes them more applicable for bio-based treatments with environmental concerns. Particularly, promising applications of Janus structures as being surfactants, drug delivery and micro/nano encapsulation vehicles for biomedical purposes successfully forward the interest on Janus concept to the food related practices. Producing Janus structures from nature-derived and food grade polymers such as alginate, cellulose, chitosan, lipid nanocrystals, zein and some plant-proteins and their usage stronger emulsions with higher stabilities, biosensing or antimicrobial practices as well as bioactive delivery and release control might be considered as a new era for food processing industry.

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“…These tiny devices benefit from the synergy between their motion attributes and their unique size, shape and structuredependent physicochemical proper ties at the micro and nanoscale. Furthermore, they show superior per formance compared to passive matter (for example, conventional static micro and nanomaterials) in all areas, including water remediation [18][19][20][21][22][23][24][25] . The active motion of micro and nanomotors drives the movement of the surrounding fluid, improving the mass transfer of chemical reac tions, which are limited to passive diffusion in static approaches.…”

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confidence: 99%

Smart micro- and nanorobots for water purification

2023

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Less than 1% of Earth’s freshwater reserves is accessible. Industrialization, population growth and climate change are further exacerbating clean water shortage. Current water-remediation treatments fail to remove most pollutants completely or release toxic by-products into the environment. The use of self-propelled programmable micro- and nanoscale synthetic robots is a promising alternative way to improve water monitoring and remediation by overcoming diffusion-limited reactions and promoting interactions with target pollutants, including nano- and microplastics, persistent organic pollutants, heavy metals, oils and pathogenic microorganisms. This Review introduces the evolution of passive micro- and nanomaterials through active micro- and nanomotors and into advanced intelligent micro- and nanorobots in terms of motion ability, multifunctionality, adaptive response, swarming and mutual communication. After describing removal and degradation strategies, we present the most relevant improvements in water treatment, highlighting the design aspects necessary to improve remediation efficiency for specific contaminants. Finally, open challenges and future directions are discussed for the real-world application of smart micro- and nanorobots.

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Janus particles and motors: unrivaled devices for mastering (bio)sensing

Cited by 19 publications

References 101 publications

Analyte Sensing with Catalytic Micromotors

Analyte Sensing with Catalytic Micromotors

Potential use of Janus structures in food applications

Smart micro- and nanorobots for water purification

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