Temperature and pressure behavior of the emission bands from Mn-, Cu-, and Eu-doped ZnS nanocrystals

The Mn-, Cu- and Eu-doped ZnS nanocrystals (NC) were analyzed for temeperature and pressure dependence of photoluminescence. The thermal quenching behavior of characteristic emission bands reflected nature of different transition mechanisms. The energies of Mn-orange and Eu-green emissions were observed to be weakly dependent on temperature. The results show strong interaction between excited state of Eu2+ ions and conduction band of ZnS which was responsible for positive pressure coefficient.published_or_final_versio

基于判断矩阵的观测量粗差发现和定位相关性分析

Author name used in this publication: 岑敏仪Author name used in this publication: 顾利亚Author name used in this publication: 丁晓利, DING Xiao-liTitle in Traditional Chinese: 基于判斷矩陣的觀測量粗差發現和定位相關性分析Journal title in Traditional Chinese: 測繪學報2004-2005 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

星载SAR复数图像的配准

Author name used in this publication: 刘国祥Author name used in this publication: 丁晓利, DING Xiao-liAuthor name used in this publication: 陈永奇Author name used in this publication: 章国宝Title in Traditional Chinese: 星載SAR複數圖像的配准Journal title in Traditional Chinese: 測繪學報2000-2001 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

使用InSAR建立DEM的试验研究

Author name used in this publication: 刘国祥Author name used in this publication: 丁晓利, DING Xiao-liAuthor name used in this publication: 陈永奇Author name used in this publication: 李志伟, LI Zhi-weiTitle in Traditional Chinese: 使用InSAR建立DEM的試驗研究Journal title in Traditional Chinese: 測繪學報Author name used in this publication: LI Zhi-lin2001-2002 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

Loess plateau storage of northeastern Tibetan plateau-derived Yellow River sediment

Marine accumulations of terrigenous sediment are widely assumed to accurately record climatic- and tectonic-controlled mountain denudation and play an important role in understanding late Cenozoic mountain uplift and global cooling. Underpinning this is the assumption that the majority of sediment eroded from hinterland orogenic belts is transported to and ultimately stored in marine basins with little lag between erosion and deposition. Here we use a detailed and multi-technique sedimentary provenance dataset from the Yellow River to show that substantial amounts of sediment eroded from Northeast Tibet and carried by the river’s upper reach are stored in the Chinese Loess Plateau and the western Mu Us desert. This finding revises our understanding of the origin of the Chinese Loess Plateau and provides a potential solution for mismatches between late Cenozoic terrestrial sedimentation and marine geochemistry records, as well as between global CO2 and erosion records

Fabrication and photoluminescent properties of Tb3+ doped carbon nanodots

Abstract Carbon nanodots (CNDs) doped with Tb ions were synthesized using different synthetic routes: hydrothermal treatment of a solution containing carbon source (sodium dextran sulfate) and TbCl3; mixing of CNDs and TbCl3 solutions; freezing-induced loading of Tb and carbon-containing source into pores of CaCO3 microparticles followed by hydrothermal treatment. Binding of Tb ions to CNDs (Tb-CND coupling) was confirmed using size-exclusion chromatography and manifested itself through a decrease of the Tb photoluminescence lifetime signal. The shortest Tb photoluminescence lifetime was observed for samples obtained by hydrothermal synthesis of CaCO3 microparticles where Tb and carbon source were loaded into pores via the freezing-induced process. The same system displays an increase of Tb photoluminescence via energy transfer with excitation at 320–340 nm. Based on the obtained results, freezing-induced loading of cations into CNDs using porous CaCO3 microparticles as reactors is proposed to be a versatile route for the introduction of active components into CNDs. The obtained CNDs with long-lived emission may be used for time-resolved imaging and visualization in living biological samples where time-resolved and long-lived luminescence microscopy is required

Growth of Comb-like ZnO Nanostructures for Dye-sensitized Solar Cells Applications

Dye-sensitized solar cells (DSSCs) were fabricated by using well-crystallized ZnO nanocombs directly grown onto the fluorine-doped tin oxide (FTO) via noncatalytic thermal evaporation process. The thin films of as-grown ZnO nanocombs were used as photoanode materials to fabricate the DSSCs, which exhibited an overall light to electricity conversion efficiency of 0.68% with a fill factor of 34%, short-circuit current of 3.14 mA/cm2, and open-circuit voltage of 0.671 V. To the best of our knowledge, this is first report in which thin film of ZnO nanocombs was used as photoanode materials to fabricate the DSSCs