Related Experiment Video
Updated: Dec 19, 2025
06:50
Preparation and 3D Tracking of Catalytic Swimming Devices
Published on: July 1, 2016
7.9K
Core@Satellite Janus Nanomotors with pH-Responsive Multi-phoretic Propulsion
Yi Xing1, Mengyun Zhou1, Tailin Xu1
1Beijing Key Laboratory for Bioengineering and Sensing Technology, Department of Chemistry & Biological Engineering, University of Science & Technology Beijing, Beijing, 100083, China.
Angewandte Chemie (International Ed. in English)
|June 8, 2020
Summary
We developed Janus mesoporous silica-platinum-gold nanomotors that switch propulsion modes in response to pH changes. These nanomotors exhibit multi-phoretic movement for advanced biomedical applications.
Area of Science:
- Nanotechnology
- Materials Science
- Physical Chemistry
Background:
- Janus nanomotors offer tunable propulsion mechanisms.
- Controlling nanomotor behavior in response to stimuli is crucial for applications.
Purpose of the Study:
- To develop novel nanomotors with switchable propulsion modes.
- To investigate pH-responsive multi-phoretic propulsion in core@satellite Janus mesoporous silica-Pt@Au nanomotors (JMPA).
Main Methods:
- Synthesis of core@satellite Janus mesoporous silica-Pt@Au nanomotors.
- Characterization of nanomotor structure and properties.
- Investigation of propulsion mechanisms including self-diffusiophoresis, self-electrophoresis, and self-thermophoresis under varying conditions (H2O2 concentration, pH, laser irradiation).
Main Results:
- JMPA nanomotors demonstrated pH-responsive multi-phoretic propulsion.
- Propulsion mode switched from self-diffusiophoresis to self-electrophoresis upon pH-induced AuNP aggregation.
- Laser irradiation induced self-thermophoresis due to thermal gradients generated by aggregated AuNPs.
Conclusions:
- The JMPA nanomotors exhibit stimuli-responsive switching of propulsion modes.
- This multi-phoretic capability holds significant promise for developing advanced nanomachines in biomedical fields.
More Related Videos
Related Concept Videos
01:13Motor Units
7.2K
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Motor units come in different sizes, with smaller units...
7.2K
00:46Motor Units
61.5K
A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
61.5K
01:16Cell Motility through Blebbing
2.3K
Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
Blebbing Through the Matrix
In multicellular...
2.3K
01:15Torque Free Motion
722
The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
722
01:22Indirect Motor Pathways
2.9K
The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
2.9K
01:24Microtubules in Cell Motility
4.4K
Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
4.4K