Photoacoustic identification of laser-induced microbubbles as light scattering centers for optical limiting in a liquid suspension of graphene nanosheets

doi:10.1039/c9nr10516f

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Photoacoustic identification of laser-induced microbubbles as light scattering centers for optical limiting in a liquid suspension of graphene nanosheets
	Zhang, Qiuhui ; Qiu, Yi ; Lin, Feng ; Niu, Chao ; Zhou, Xufeng ; Liu, Zhaoping ; Alam, Md Kamrul ; Dai, Shenyu ; Zhang, Wei ; Hu, Jonathan
刊名	NANOSCALE
	2020
卷号	12 期号:13 页码:7109-7115
关键词	ABSORPTION OXIDE DISPERSIONS NONLINEARITY DIFFRACTION MECHANISMS EMISSION BEHAVIOR PLASMA POWER
DOI	10.1039/c9nr10516f
英文摘要	Liquid suspensions of carbon nanotubes, graphene and transition metal dichalcogenides have exhibited excellent performance in optical limiting. However, the underlying mechanism has remained elusive and is generally ascribed to their superior nonlinear optical properties such as nonlinear absorption or nonlinear scattering. Using graphene as an example, we show that photo-thermal microbubbles are responsible for optical limiting as strong light scattering centers: graphene sheets absorb incident light and become heated up above the boiling point of water, resulting in vapor and microbubble generation. This conclusion is based on the direct observation of bubbles above the laser beam as well as a strong correlation between laser-induced ultrasound and optical limiting. In situ Raman scattering of graphene further confirms that the temperature of graphene under laser pulses rises above the boiling point of water but still remains too low to vaporize graphene and create graphene plasma bubbles. Photo-thermal bubble scattering is not a nonlinear optical process and requires very low laser intensity. This understanding helps us to design more efficient optical limiting materials and understand the intrinsic nonlinear optical properties of nanomaterials.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19808]
专题	2020专题
作者单位	1.Bao, JM (corresponding author), Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China. 2.Bao, JM (corresponding author), Univ Houston, Mat Sci & Engn, Houston, TX 77204 USA.
推荐引用方式 GB/T 7714	Zhang, Qiuhui,Qiu, Yi,Lin, Feng,et al. Photoacoustic identification of laser-induced microbubbles as light scattering centers for optical limiting in a liquid suspension of graphene nanosheets[J]. NANOSCALE,2020,12(13):7109-7115.
APA	Zhang, Qiuhui.,Qiu, Yi.,Lin, Feng.,Niu, Chao.,Zhou, Xufeng.,...&Bao, Jiming.(2020).Photoacoustic identification of laser-induced microbubbles as light scattering centers for optical limiting in a liquid suspension of graphene nanosheets.NANOSCALE,12(13),7109-7115.
MLA	Zhang, Qiuhui,et al."Photoacoustic identification of laser-induced microbubbles as light scattering centers for optical limiting in a liquid suspension of graphene nanosheets".NANOSCALE 12.13(2020):7109-7115.