There are a few interesting resources about this[1]. The concept of "microelectromechanical neural network application" [2] is super interesting. We've been hearing about memristors for a while, but has anyone seen them being widely deployed anywhere?

[1] http://www.physnews.com/nano-physics-news/cluster1837307157/

[2] https://aip.scitation.org/doi/full/10.1063/1.5038038