Invention Description
Neuromodulation provides a powerful way to study and control neural activity, but many existing techniques require invasive implants, wired connections, or external power sources. These limitations can restrict movement and make it difficult to stimulate deeper brain regions in freely moving subjects. Conventional light-based approaches also face challenges with limited tissue penetration. There is a need for a minimally invasive, wireless method that can effectively reach and modulate neural activity in deeper tissues.
Researchers at Arizona State University have developed a seedless, one-pot synthesis method for producing urchin-shaped gold nanoparticles (GNPs) with tunable near-infrared (NIR) absorption. GNP shape, stability, and growth, can be controlled to achieve strong NIR absorption vital for deep tissue penetration. Optimized molecular weights promote anisotropic growth and stability. These GNPs efficiently convert laser irradiation into localized heat, enabling advanced applications such as tumor therapy and deep-brain stimulation at greater tissue depths. Combined with a wireless, battery-free device, the GNPs allows neuromodulation in freely behaving subjects without tethered equipment. In vitro, ex vivo, and in vivo studies demonstrated effective neural modulation, measurable behavioral responses, and promising safety and performance.
This novel, wireless, battery-free system enables deep-tissue photothermal neuromodulation using optimized urchin-shaped gold nanoparticles.
Potential Applications
- Deep-tissue photothermal therapies for cancer and neurological disorders
- Neuroscience applications requiring wireless deep brain stimulation
- Development of wearable and implantable neuromodulation devices
- Biomedical imaging and diagnostics
- Integrated platforms for real-time neural activity control and monitoring
- Nanoparticle-based therapeutic developments
Benefits and Advantages
- Wireless and battery-free operation eliminates tethering limitations
- Deep-tissue neuromodulation with optimized NIR-responsive urchin-shaped gold nanoparticles
- Minimally invasive with high photothermal efficiency and confirmed safety
- Enables real-time behavioral modulation in freely moving subjects
- Seedless, one-pot synthesis simplifies production and scalability
- Enhanced nanoparticle stability and anisotropic growth through optimized capping agents
- Efficient localized heating suitable for targeted photothermal therapies
- Scalable platform supporting clinical translation of GNP-mediated treatments