  The basic units in our brain are neurons and each neuron has more than 1000
synapse connections. Synapse is the basic structure for information transfer in
an ever-changing manner, and short-term plasticity allows synapses to perform
critical computational functions in neural circuits. Therefore the major
challenge for the hardware implementation of neuromorphic computation is to
develop artificial synapse. Here, in-plane oxide-based artificial synapse
network coupled by proton neurotransmitters are self-assembled on glass
substrates at room-temperature. A strong lateral modulation is observed due to
the proton migration in the nanogranular phosphorus-doped SiO2 electrolyte
films. Functional roles of short-term plasticity, including paired-pulse
facilitation, dynamic filtering and spatiotemporally correlated signal
processing are mimicked. Such in-plane oxide-based protonic/electronic hybrid
synapse network proposed here are interesting for building future neuromorphic
systems.
