Autonomous Formation and Annealing of Colloidal Crystals Induced by Light‐Powered Oscillations of Active Particles

Altemose, Alicia; Harris, Aaron J.; Sen, Ayusman

doi:10.1002/syst.201900061

Cited by 8 publications

(3 citation statements)

References 36 publications

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“…From the context of potential applications, the minimalist design approach needs to be streamlined towards making the nano structures robust and cost effective with adaptable functionalities under harsh conditions. 6,53,56,[203][204][205][206][207][208][209][210] Notably, so far, the catalytic activity of the minimal systems has been restricted in mimicking a very limited set of evolved enzymes (i.e. hydrolase, peroxidase, aldolase, and laccase), while other enzymes, specifically isoenzymes and stereoselective enzymes, need more attention.…”

Section: Discussionmentioning

confidence: 99%

Systems chemistry of peptide-assemblies for biochemical transformations

et al. 2022

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Section: Discussionmentioning

confidence: 99%

Systems chemistry of peptide-assemblies for biochemical transformations

et al. 2022

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“…studied the collective behaviors of Ag 3 PO 4 micromotors made of an amorphous morphology. [ 4c,15 ] Moreover, Rojas et al. investigated the influence of amorphous, cubic and pyramidal shapes of Ag 3 PO 4 on their motion efficiencies, resulting in overall low motion performances.…”

Section: Introductionmentioning

confidence: 99%

Self‐Degradable Photoactive Micromotors for Inactivation of Resistant Bacteria

Yuan,

Suárez‐García,

De Corato

et al. 2024

Advanced Optical Materials

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Pathogenic bacteria pose a significant threat to human health, and their removal from food and water supplies is crucial in preventing the spread of waterborne and foodborne diseases. Recently, silver‐based photocatalytic micromotors have emerged as promising candidates for inactivating pathogenic microbes due to their high antibacterial activity. In this study, the synthesis of photoactive Ag3PO4 micromotors with a well‐defined tetrapod‐like structure (TAMs) is presented using a simple precipitation method. These TAMs autonomously move and release Ag ions/nanoparticles (NPs) through a photodegradation process when exposed to light, which enhances their antimicrobial activity against Gram‐negative (Escherichia coli) and Gram‐positive (Staphylococcus aureus) bacterial strains. Interestingly, different motion modes are observed under different manipulated light wavelengths and fuels. Furthermore, the self‐degradation of TAMs is accelerated in the presence of negatively charged bacteria, which results in higher removal rates of both bacteria, E. Coli and S. aureus. The findings introduce a new concept of self‐degradable micromotors based on photocatalytic components, which hold great potential for their use in antimicrobial applications. This work offers significant implications for materials chemistry, especially in designing and developing the next generation of light‐driven antimicrobial agents.

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“…As will be eluded to later, our proposed strategy is based on the well-known principle of coupled oscillators and is preceded by pioneering studies of synchronized oscillators, ranging from mechanically coupled metronomes and crystal cavities and electrochemically coupled mercury hearts − to chemically coupled BZ solutions and gels, cardiac cells, and neurons . The particular micromotors we are interested in originated from the Sen group, who demonstrated that microparticles of silver (Ag), silver chloride (AgCl), or silver phosphate (Ag 3 PO 4 ), in the presence of certain chemicals and under illumination, form beating clusters that synchronize with each other. − These Ag-based oscillators could potentially serve as a prototype of coordinated microbots, yet their functionalities are unfortunately limited by a lack of understanding of their unique dynamics and interactions, an issue that we aim to address.…”

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confidence: 99%

Coordinating an Ensemble of Chemical Micromotors via Spontaneous Synchronization

et al. 2020

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Spatiotemporal coordination of a nanorobot ensemble is critical for their operation in complex environments, such as tissue removal or drug delivery. Current strategies of achieving this task, however, rely heavily on sophisticated, external manipulation. We here present an alternative, biomimetic strategy by which oscillating Ag Janus micromotors spontaneously synchronize their dynamics as chemically coupled oscillators. By quantitatively tracking the kinetics at both an individual and cluster level, we find that synchronization emerges as the oscillating entities are increasingly coupled as they approach each other. In addition, the synchronized beating of a cluster of these oscillating colloids was found to be dominated by substrate electroosmosis, revealed with the help of an acoustic trapping technique. This quantitative, systematic study of synchronizing micromotors could facilitate the design of biomimetic nanorobots that spontaneously communicate and organize at micro- and nanoscales. It also serves as a model system for nonlinear active matter.

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Autonomous Formation and Annealing of Colloidal Crystals Induced by Light‐Powered Oscillations of Active Particles

Cited by 8 publications

References 36 publications

Systems chemistry of peptide-assemblies for biochemical transformations

Systems chemistry of peptide-assemblies for biochemical transformations

Self‐Degradable Photoactive Micromotors for Inactivation of Resistant Bacteria

Coordinating an Ensemble of Chemical Micromotors via Spontaneous Synchronization

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