此外,这类碳点因良好的光声特性,可应用于光声成像超分辨方面。中以双方团队通过进一步合作,将另外一类两色可逆转换碳点(绿光和红光的最高发光效率为80%,ACS Appl. Mater. Interfaces, 2018, 10,16005)应用到了光声超分辨成像中,提出了一种基于多个亚像素吸收器的分离和定位的扩展分辨率成像概念,该技术提高了光声成像超分辨率。相关工作以“Autoencoder based blind source separation for photoacoustic resolution enhancement”为题发表在Scientific Reports (2020, 10, 21414)杂志。上述相关研究工作已经申请中国发明专利,并得到了国家自然科学基金和中国科学院国际人才计划-外国专家特聘研究员计划项目等资助。
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NPG Asia Materials Editorial Summary
Nanomaterials: Tiny dots achieve high-resolution imaging
Graphene nanoparticles useful for high-resolution spectroscopy and imaging have been fabricated by scientists in China and Israel. Quantum dots are nanoparticles of semiconductor that can trap electrons and their positively charged counterparts, ‘holes’. The light emitted when the electron and hole combine is notable for its high spectral purity, i.e., its very narrow range of frequencies, or colors. Zheng Xie from the Technical Institute of Physics and Chemistry in Beijing, Zeev Zalevsky from Bar-Ilan University, Ramat-Gan, and their colleagues used a simple one-pot method to synthesize graphene quantum dots that emit ultranarrow frequency light in two different shades of red. The team proposed unique configurations for using those nanoparticles for spatial and spectral superresolved sensing specifically for field called nanoscopy, to create images at a resolution beyond that achievable with a microscope.
NPG Asia Materials 编辑提要: 纳米材料:小点实现高分辨成像
中国和以色列的科学家已经制备出可用于高分辨光谱和成像的石墨烯纳米颗粒。量子点属于半导体纳米粒子,可以捕获电子和带正电的对应物“空穴”。当电子和空穴结合时发出的光以其高光谱纯度而著名,即具有非常窄的频率或颜色范围。来自北京的理化技术研究所谢政和来自拉马特甘的巴伊兰大学Zeev Zalevsky及其同事,采用一种简单的一锅法合成了两种石墨烯量子点,这两种量子点发射出不同峰形和强度的超窄带红光。该团队提出了独特的策略将这些纳米颗粒用于空间和光谱超分辨传感,特别是用于称为纳米显微领域,以创建超过显微镜所能达到分辨率的图像。