Helix Shape Power-Dependent Properties of Single Upconversion Nanoparticles

Liao, Jiayan1; Jin, Dayong1,2; Chen, Chaohao1; Li, Yiming3; Zhou, Jiajia1

2020-04-16

10.1021/acs.jpclett.9b03838

Journal of Physical Chemistry Letters   影响因子和分区

1948-7185

Nonblinking, nonbleaching, and superbright single upconversion nanoparticles have been recently discovered with nonlinear power-dependent properties and can be switchable under dual-beam excitations, which are ideal for super-resolution microscopy, single-molecule tracking, and digital assays. Here, we report that the brightness of Nd3+-Yb3+-Er3+-doped nanoparticles displays a pair of unusual double helix shapes as the function of power densities of 976 and 808 nm excitations. We systemically analyze the power-dependent emission spectra, lifetimes, and power-intensity double-log slopes of single upconversion nanoparticles, which reveal that the dynamic roles of Nd3+ ions in the tridoped nanosystem with underlining electron population pathways are power dependent. That is, at high power 808 nm excitation, Nd3+ ions can directly emit upconverted luminescence, with their conventional role of sensitization saturated in the Nd-3 -> Yb-3+( )-> Er3+ energy transfer systems. Moreover, we confirm that the universal helix shape phenomena commonly exist in a set of eight batches of core-shell nanoparticles regardless of the doping concentrations of Nd3+, Yb3+, and Er3+ ions in the sensitization shell, migration shell, and active core, though the crossing nodes occur at different excitation power ranges. This study emphasizes the important role of power-dependent properties in both improving the upconversion emission efficiency and the design of nonlinear responsive probes for imaging and sensing.

SCI ; EI

英语

NI论文

其他

China Scholarship Council Scholarships[201508530231]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical

WOS:000526353000015

AMER CHEMICAL SOC

20202008667892

Energy transfer ; Nanosystems ; Core shell nanoparticles ; Silica nanoparticles ; Emission spectroscopy

Nanotechnology:761 ; Solid State Physics:933 ; Materials Science:951

Web of Science

1.Univ Technol Sydney, Fac Sci, IBMD, Ultimo, NSW, Australia
2.Southern Univ Sci & Technol, UTS SUStech Joint Res Ctr Biomed Mat & Devices, Dept Biomed Engn, Shenzhen, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Dept Biomed Engn, Shenzhen 518055, Peoples R China

Liao, Jiayan,Jin, Dayong,Chen, Chaohao,et al. Helix Shape Power-Dependent Properties of Single Upconversion Nanoparticles[J]. Journal of Physical Chemistry Letters,2020,11(8):2883-2890.

Liao, Jiayan,Jin, Dayong,Chen, Chaohao,Li, Yiming,&Zhou, Jiajia.(2020).Helix Shape Power-Dependent Properties of Single Upconversion Nanoparticles.Journal of Physical Chemistry Letters,11(8),2883-2890.

Liao, Jiayan,et al."Helix Shape Power-Dependent Properties of Single Upconversion Nanoparticles".Journal of Physical Chemistry Letters 11.8(2020):2883-2890.