Details

Autor(en) / Beteiligte

• Liu, Kai‐Kai
• Song, Shi‐Yu
• Sui, Lai‐Zhi
• Wu, Si‐Xuan
• Jing, Peng‐Tao
• Wang, Ruo‐Qiu
• Li, Qing‐Yi
• Wu, Guo‐Rong
• Zhang, Zhen‐Zhong
• Yuan, Kai‐Jun
• Shan, Chong‐Xin

Titel

Efficient Red/Near‐Infrared‐Emissive Carbon Nanodots with Multiphoton Excited Upconversion Fluorescence

Ist Teil von

• Advanced science, 2019-09, Vol.6 (17), p.1900766-n/a

Ort / Verlag

Germany: John Wiley & Sons, Inc

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Red/near‐infrared (NIR) emissive carbon nanodots (CNDs) with photoluminescence (PL) quantum yield (QY) of 57% are prepared via an in situ solvent‐free carbonization strategy for the first time. 1‐Photon and 2‐photon cellular imaging is demonstrated by using the CNDs as red/NIR fluorescence agent due to the high PL QY and low biotoxicity. Further study shows that the red/NIR CNDs exhibit multiphoton excited (MPE) upconversion fluorescence under excitation of 800–2000 nm, which involves three NIR windows (NIR‐I, 650–950 nm; NIR‐II, 1100–1350; NIR‐III, 1600–1870 nm). 2‐Photon, 3‐photon, and 4‐photon excited fluorescence of the CNDs under excitation of different wavelengths is achieved. This study develops an in situ solvent‐free carbonization method for efficient red/NIR emissive CNDs with MPE upconversion fluorescence, which may push forward the application of the CNDs in bioimaging. Red/near‐infrared (NIR) emissive carbon nanodots (CNDs) with photoluminescence quantum yield of 57% are demonstrated via an in situ solvent‐free strategy. 1‐Photon and 2‐photon cellular imaging is demonstrated. Furthermore, multiphoton excited red/NIR fluorescence of the CNDs is achieved.