'Thermal substitution' for preparing ternary BCN nanosheets with enhanced and controllable nonlinear optical performance. Issue 10 (22nd February 2017)

• Record Type: Journal Article
• Authors: Ma, Fukun; Wang, Mengxia; Shao, Yongliang; Wang, Lijuan; Wu, Yongzhong; Wang, Zhengping; Hao, Xiaopeng
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 10(2017)
• Page Start: 2559
• Page End: 2565
• Publication Date: 2017-02-22
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc00131b
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A novel 'thermal substitution' method is used to prepare BCN nanosheets and the as-obtained nanosheets show controllable NLO properties. Abstract : Boron carbon nitride (BCN) nanosheets have gained increased attention as a novel semiconductor because of their controllable band-gap and environmentally-friendly properties. This study presents a facile 'thermal substitution' method for preparing BCN nanosheets through substitutional C doping into hexagonal boron nitride nanosheets (BNNSs) at 850 °C. 'Thermal substitution' is an effective method used to tune the band-gap of BCN nanosheets by adjusting the amount of carbon atoms incorporated. After irradiation by laser pulses at 1064 and 532 nm, the as-obtained BCN nanosheets exhibit excellent nonlinear optical (NLO) performance. The NLO absorption properties of the nanosheets shift from saturable absorption to reverse saturable absorption. The corresponding NLO performance can be adjusted by controlling the carbon content in the BCN nanosheets. The developed BCN nanosheets can be utilised as a new and advanced NLO material for sensitive optical components and laser protection.