Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.241
Publication date: 7th February 2022
Our team works on developing ultrathin optoelectronic devices for biomedical implants that can stimulate biophysical processes. All of these devices rely on near infrared irradiation in the tissue transparency window to actuate nanoscale organic semiconductor components. Our motivation is to provide a minimalistic wireless implant which can perform the duty of standard implantable electrodes, but without invasive wiring. The devices we fabricate are not only wireless, but also 100-1000 times thinner than most existing technologies. Making implants have as small as possible mechanical footprint improves the efficacy of bioelectronic medical treatments by minimizing the risk for inflammation and making surgical implantation less invasive.
Organic semiconductor thin films can afford charging of electrolytic double layers or faradaic reactions. The magnitude of these two effects will depend on the thermodynamics of the materials used in the devices, in particular the nature of the cathodic and anodic components of the device, as well as the capacitance. Through judicious selection of materials one can obtain high photovoltages which can either drive efficient charging of double layer capacitors or faradaic reactions. The former is used to generate displacement currents which can capacitively couple with the cell membrane potential of nearby cells – this can be used to stimulate action potentials. Our experiment and model converge to create a detailed picture of how such devices, known as organic electrolytic photocapacitors, work to affect the gating of ion channels. This device can mimic biphasic current-pulse neurostimulation and thus transduces an optical signal into directly-evoked action potentials in neurons. On the other hand, the other block of our research efforts is directed at devices which, when stimulated with light, perform faradaic chemistry. We focus on the delivery of controlled amounts of reactive oxygen species (mostly peroxide). We aim to study the effects of photoelectrochemically-generated peroxides on physiological processes, with the hope of developing novel therapeutic approaches to neurodegenerative diseases.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.