title: Mini-Sized Carbon Nitride Nanosheets with Double Excitation- and pH-Dependent Fluorescence Behaviors for Two-Photon Cell Imaging.
abstract: Synthesis of mini-sized carbon nitride nanosheets (CNNSs) by traditional methods remains a challenge. Herein, size-tunable and uniform mini-sized CNNSs are synthesized by hydrothermal carbonization of a single polyethyleneimine (PEI) precursor. The as-obtained mini-sized CNNSs possess uniform size, good hydrophilicity and abundant nitrogen active sites, which not only exhibit double excitation- and pH-dependent fluorescence behaviors, but also two-photon excitation fluorescence. áThe resulting CNNSs display low toxicity and can be efficiently delivered into live cells for two-photon fluorescence imaging, offering great potential as fluorescence probes in biochemical applications.
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, NanjingTech, 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Liu
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, NanjingTech, 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Duoduo
authors.initials: D
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, NanjingTech, 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Li
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, NanjingTech, 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Minrui
authors.initials: M
authors.lastname: Weng
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, NanjingTech, 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Chengwu
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, NanjingTech, 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Shiyu
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, NanjingTech, 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Jixin
authors.initials: J
authors.lastname: Zhu
authors.affiliation: Department of Civil Engineering, University of Hong Kong, Porkfulam Road, Hong Kong, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Feng
authors.affiliation: Department of Civil Engineering, University of Hong Kong, Porkfulam Road, Hong Kong, China.
authors.forename: Kaimin
authors.initials: K
authors.lastname: Shih
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, NanjingTech, 30 South Puzhu Road, Nanjing, 211816, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
keywords: carbon nitride nanosheets; carbonization; fluorescence; nanostructures; polyethyleneimine