Efficient ethanol solvothermal synthesis of high-performance nitrogen-doped carbon quantum dots from lignin for metal ion nanosensing and cell imaging

Zhanzhao Pang, Yujie Fu, Hailong Yu, Shiwei Liu, Shitao Yu, Yuxiang Liu, Qiong Wu, Yue Liu, Genkuo Nie, Huanfei Xu, Shuangxi Nie, Shuangquan Yao