Chang Gung University

Ming-Jer Jeng

Wu-Shiung Feng

Liann-Be Chang

Mu-Yi Hua

Rung-Ywan Tsai

Hsiao-Chien Chen

Yu-Lin Lee

Shi-Liang Chen

A chemically-modified graphene includes a graphene layer and a plurality of functional groups that are grafted to the graphene layer and each of which is represented by &#x2014;CO&#x2014;R&#x2014;COOH, wherein R is an optionally substituted C-Calkylene group or an optionally substituted C-Calkenylene group. A method for producing a chemically-modified grapheme includes subjecting a cyclic anhydride and graphite to a Friedel-Crafts reaction in the presence of a Lewis acid.

Chemically-modified graphene and method for producing the same

An EMP protection circuit with a counter has a surge protection circuit capable of suppressing EMP, and also use an extra counting circuit for sensing light emission or variation of magnetic force of the surge protection circuit to count the action times of the surge protection circuit, thereby warning that the surge protection circuit has reached its time-limit of use and has to be replaced. In this way, various kinds of electronic products can be more perfectly protected to avoid higher loss.

Electro-magnetic pulse protection circuit with a counter

Growing community of inventors

Taipei, Taiwan

Ming-Jer Jeng