6 research outputs found
Deforestation for pastures in Central America: the last fifteen years
Micromotors are an
emerging class of micromachines that could find
potential applications in biomedicine, environmental remediation,
and microscale self-assembly. Understanding their propulsion mechanisms
holds the key to their future development. This is especially true
for a popular category of micromotors that are driven by asymmetric
surface photochemical reactions. Many of these micromotors release
ionic species and are propelled via a mechanism termed “ionic
self-diffusiophoresis”. However, exactly how it operates remains
vague. To address this fundamental yet important issue, we have developed
a dielectric-AgCl Janus micromotor that clearly moves away from the
AgCl side when exposed to UV or strong visible light. Taking advantage
of numerical simulations and acoustic levitation techniques, we have
provided tentative explanations for its speed decay over time as well
as its directionality. In addition, photoactive AgCl micromotors demonstrate
interesting gravitactic behaviors that hint at three-dimensional transport
or sensing applications. The current work presents a well-controlled
and easily fabricated model system to understand chemically powered
micromotors, highlighting the usefulness of acoustic levitation for
studying active matter free from the effect of boundaries
Photochemically Powered AgCl Janus Micromotors as a Model System to Understand Ionic Self-Diffusiophoresis
Micromotors are an
emerging class of micromachines that could find
potential applications in biomedicine, environmental remediation,
and microscale self-assembly. Understanding their propulsion mechanisms
holds the key to their future development. This is especially true
for a popular category of micromotors that are driven by asymmetric
surface photochemical reactions. Many of these micromotors release
ionic species and are propelled via a mechanism termed “ionic
self-diffusiophoresis”. However, exactly how it operates remains
vague. To address this fundamental yet important issue, we have developed
a dielectric-AgCl Janus micromotor that clearly moves away from the
AgCl side when exposed to UV or strong visible light. Taking advantage
of numerical simulations and acoustic levitation techniques, we have
provided tentative explanations for its speed decay over time as well
as its directionality. In addition, photoactive AgCl micromotors demonstrate
interesting gravitactic behaviors that hint at three-dimensional transport
or sensing applications. The current work presents a well-controlled
and easily fabricated model system to understand chemically powered
micromotors, highlighting the usefulness of acoustic levitation for
studying active matter free from the effect of boundaries
Photochemically Powered AgCl Janus Micromotors as a Model System to Understand Ionic Self-Diffusiophoresis
Micromotors are an
emerging class of micromachines that could find
potential applications in biomedicine, environmental remediation,
and microscale self-assembly. Understanding their propulsion mechanisms
holds the key to their future development. This is especially true
for a popular category of micromotors that are driven by asymmetric
surface photochemical reactions. Many of these micromotors release
ionic species and are propelled via a mechanism termed “ionic
self-diffusiophoresis”. However, exactly how it operates remains
vague. To address this fundamental yet important issue, we have developed
a dielectric-AgCl Janus micromotor that clearly moves away from the
AgCl side when exposed to UV or strong visible light. Taking advantage
of numerical simulations and acoustic levitation techniques, we have
provided tentative explanations for its speed decay over time as well
as its directionality. In addition, photoactive AgCl micromotors demonstrate
interesting gravitactic behaviors that hint at three-dimensional transport
or sensing applications. The current work presents a well-controlled
and easily fabricated model system to understand chemically powered
micromotors, highlighting the usefulness of acoustic levitation for
studying active matter free from the effect of boundaries
Photochemically Powered AgCl Janus Micromotors as a Model System to Understand Ionic Self-Diffusiophoresis
Micromotors are an
emerging class of micromachines that could find
potential applications in biomedicine, environmental remediation,
and microscale self-assembly. Understanding their propulsion mechanisms
holds the key to their future development. This is especially true
for a popular category of micromotors that are driven by asymmetric
surface photochemical reactions. Many of these micromotors release
ionic species and are propelled via a mechanism termed “ionic
self-diffusiophoresis”. However, exactly how it operates remains
vague. To address this fundamental yet important issue, we have developed
a dielectric-AgCl Janus micromotor that clearly moves away from the
AgCl side when exposed to UV or strong visible light. Taking advantage
of numerical simulations and acoustic levitation techniques, we have
provided tentative explanations for its speed decay over time as well
as its directionality. In addition, photoactive AgCl micromotors demonstrate
interesting gravitactic behaviors that hint at three-dimensional transport
or sensing applications. The current work presents a well-controlled
and easily fabricated model system to understand chemically powered
micromotors, highlighting the usefulness of acoustic levitation for
studying active matter free from the effect of boundaries
Photochemically Powered AgCl Janus Micromotors as a Model System to Understand Ionic Self-Diffusiophoresis
Micromotors are an
emerging class of micromachines that could find
potential applications in biomedicine, environmental remediation,
and microscale self-assembly. Understanding their propulsion mechanisms
holds the key to their future development. This is especially true
for a popular category of micromotors that are driven by asymmetric
surface photochemical reactions. Many of these micromotors release
ionic species and are propelled via a mechanism termed “ionic
self-diffusiophoresis”. However, exactly how it operates remains
vague. To address this fundamental yet important issue, we have developed
a dielectric-AgCl Janus micromotor that clearly moves away from the
AgCl side when exposed to UV or strong visible light. Taking advantage
of numerical simulations and acoustic levitation techniques, we have
provided tentative explanations for its speed decay over time as well
as its directionality. In addition, photoactive AgCl micromotors demonstrate
interesting gravitactic behaviors that hint at three-dimensional transport
or sensing applications. The current work presents a well-controlled
and easily fabricated model system to understand chemically powered
micromotors, highlighting the usefulness of acoustic levitation for
studying active matter free from the effect of boundaries
Photochemically Powered AgCl Janus Micromotors as a Model System to Understand Ionic Self-Diffusiophoresis
Micromotors are an
emerging class of micromachines that could find
potential applications in biomedicine, environmental remediation,
and microscale self-assembly. Understanding their propulsion mechanisms
holds the key to their future development. This is especially true
for a popular category of micromotors that are driven by asymmetric
surface photochemical reactions. Many of these micromotors release
ionic species and are propelled via a mechanism termed “ionic
self-diffusiophoresis”. However, exactly how it operates remains
vague. To address this fundamental yet important issue, we have developed
a dielectric-AgCl Janus micromotor that clearly moves away from the
AgCl side when exposed to UV or strong visible light. Taking advantage
of numerical simulations and acoustic levitation techniques, we have
provided tentative explanations for its speed decay over time as well
as its directionality. In addition, photoactive AgCl micromotors demonstrate
interesting gravitactic behaviors that hint at three-dimensional transport
or sensing applications. The current work presents a well-controlled
and easily fabricated model system to understand chemically powered
micromotors, highlighting the usefulness of acoustic levitation for
studying active matter free from the effect of boundaries