Also explored were the photophysical properties and conduction characteristics governing the devices fabricated using these nanomaterials.
explored 不是形容词，而是过去分词。这个句子是被动句，也是倒装句，因主语太长，为避免头重脚轻，照顾句子匀称而倒装。正常语序是：
The photophysical properties and conduction characteristics governing the devices fabricated using these nanomaterials were also explored.
