Core Insights - Researchers at Ulsan National Institute of Science and Technology have developed a fully biodegradable artificial synapse made from natural materials, which can extend memory retention time to nearly 100 minutes, addressing issues related to electronic waste and paving the way for sustainable neuromorphic technology [1][2]. Group 1: Performance and Structure - The artificial synapse features a layered structure resembling a mini "sandwich," with two ionic active layers sandwiching an ionic bonding layer made from cellulose acetate derived from plant stems, along with materials sourced from shells and legumes [1]. - This device operates with low energy consumption, requiring only 0.85 femtojoules per signal transmission, significantly lower than the 2.4 to 24 femtojoules needed by natural brain synapses [1]. Group 2: Biodegradability and Environmental Impact - The ionic active layer and bonding layer of the device can naturally decompose in soil within approximately 16 days, using environmentally safe materials that do not leave harmful residues after decomposition [2]. - The development addresses multiple challenges in artificial synapses, including ultra-low power consumption, stability, durability, and biodegradability, marking a significant advancement in creating neuromorphic devices that can safely interact with the environment and eventually dissolve [2]. Group 3: Application Potential - A simple robotic system demonstrated the device's application potential, where it can amplify signals in response to heat, triggering a mechanical hand to withdraw from a hot object, simulating human reflex behavior [2]. - This suggests future possibilities for developing environmentally friendly robots that can learn, respond to environmental stimuli, and harmlessly disappear after completing their tasks [2].