scholarly journals Morphology control and optical properties of CdSe nanorods by surface ligands-=SUP=-*-=/SUP=-

2019 ◽  
Vol 45 (16) ◽  
pp. 23
Author(s):  
Zhiyuan Lin ◽  
Jinhua Li ◽  
Ke Feng ◽  
Yue Wang ◽  
Xueying Chu ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Optical Materials ◽  
Crystal Surface ◽  
Crystal Face ◽  
Absorption And Emission ◽  
Surface Ligands ◽  
Optical Stability ◽  
Cdse Nanorod ◽  
Cdse Nanorods ◽  
Effect Of Surface

In this paper, CdSe nanorods were prepared via solvothermal synthesis, the effect of surface ligands on the morphology of nanorods was investigated under the premise by tuning the percentage of surface ligands in the precursors. Experimental results show that the absorption and emission spectrum of CdSe nanorod with different aspect ratio varying from 4:1 to 2:1 have a red-shift, and the aspect ratio gradually decreases as the percentage of tetradecylphosphoric acid (TDPA) in the precursor increases. In addition, the CdSe optical stability improves as the percentage of TDPA increases. It is also shown that the crystal surface, which is not covered by TDPA, has an increased surface energy, which results in rapid growth of the crystal face and the formation of a rod-like structure. As a result, the effects of anisotropic absorption and emission, along the long axis properties can find many applications in the fields of optics, optical materials.

Effect of surface chemistry on bio-conjugation and bio-recognition abilities of 2D germanene materials

Nanoscale ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 1893-1903
Author(s):  
Wei Li Ang ◽  
Jiri Sturala ◽  
Nikolas Antonatos ◽  
Zdeněk Sofer ◽  
Alessandra Bonanni
Keyword(s):  
Surface Chemistry ◽  
Strong Influence ◽  
Intrinsic Fluorescence ◽  
Surface Ligands ◽  
Chemically Modified ◽  
Recognition Efficiency ◽  
Effect Of Surface

The surface ligands on chemically modified germanenes have strong influence on the intrinsic fluorescence, on the bio-conjugation ability and the bio-recognition efficiency of the material towards the detection of a specific analyte.

Porous Hydroxyapatite with Tailored Crystal Surface Prepared by Hydrothermal Method

2005 ◽  
Vol 284-286 ◽  
pp. 353-356 ◽  
Author(s):  
Koji Ioku ◽  
Giichiro Kawachi ◽  
Nakamichi Yamasaki ◽  
Hirotaka Fujimori ◽  
Seishi Goto
Keyword(s):  
Aspect Ratio ◽  
Vapor Pressure ◽  
Hydrothermal Method ◽  
Saturated Vapor Pressure ◽  
Crystal Surface ◽  
Saturated Vapor ◽  
Pure Water ◽  
Porous Hydroxyapatite ◽  
Exposure Method ◽  
The Mean

Porous plates of hydroxyapatite (Ca10(PO4)6(OH)2; HA) with about 0.5 to 5 mm in thickness and porous HA granules of about 40 µm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105 °C under saturated vapor pressure of pure water. Porous HA plates with about 75 % porosity prepared at 120 °C were composed of rod-shaped crystals of about 20 µm in length. Porous HA granules prepared at 160 °C were also composed of rod-shaped crystals of about 20 µm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 to 0.5 µm in size. Both of materials were nonstoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.

scholarly journals Effect of surface ligands on gold nanocatalysts for CO2 reduction

2020 ◽  
Vol 11 (45) ◽  
pp. 12298-12306
Author(s):  
Hongyu Shang ◽  
Spencer K. Wallentine ◽  
Daniel M. Hofmann ◽  
Quansong Zhu ◽  
Catherine J. Murphy ◽  
...  
Keyword(s):  
Metal Ions ◽  
Au Nanoparticles ◽  
Co2 Reduction ◽  
Permeable Membrane ◽  
Surface Ligands ◽  
Minimal Loss ◽  
Effect Of Surface

Dodecanethiol on Au nanoparticles significantly enhances selectivity and stability with minimal loss in activity by acting as a CO2-permeable membrane, which blocks the deposition of metal ions that are otherwise responsible for rapid deactivation.

Hydrothermal Preparation of Porous Hydroxyapatite with Tailored Crystal Surface

2005 ◽  
Vol 288-289 ◽  
pp. 521-524 ◽  
Author(s):  
Alin Iuga ◽  
Giichiro Kawachi ◽  
Nakamichi Yamasaki ◽  
M. Toda ◽  
Hirotaka Fujimori ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Vapor Pressure ◽  
Saturated Vapor Pressure ◽  
Crystal Surface ◽  
Saturated Vapor ◽  
Pure Water ◽  
Hydrothermal Preparation ◽  
Porous Hydroxyapatite ◽  
Exposure Method ◽  
The Mean

Porous sheets of hydroxyapatite (Ca10(PO)4(OH)2; HA) with about 50 µm to 1 mm in thickness and porous HA granules of about 50 µm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105 °C under saturated vapor pressure of pure water. Porous HA sheets with about 75 % porosity prepared at 120 °C were composed of rod-shaped crystals of about 30 µm in length. Porous HA granules prepared at 160 °C were also composed of rod-shaped crystals of about 20 µm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 µm in size. Both of materials were nonstoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.

The surface chemistry of iron oxide nanocrystals: surface reduction of γ-Fe2O3 to Fe3O4 by redox-active catechol surface ligands

2018 ◽  
Vol 6 (2) ◽  
pp. 326-333 ◽  
Author(s):  
P. Daniel ◽  
S. I. Shylin ◽  
H. Lu ◽  
M. N. Tahir ◽  
M. Panthöfer ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Surface Chemistry ◽  
Surface Functionalization ◽  
Surface Ligands ◽  
Surface Reduction ◽  
Redox Active ◽  
Structural And Magnetic Properties ◽  
Effect Of Surface

The effect of surface functionalization on the structural and magnetic properties of catechol-functionalized iron oxide magnetic (γ-Fe2O3) nanocrystals was investigated.

Morphology Control and Optical Properties of CdSe Nanorods by Surface Ligands

2019 ◽  
Vol 45 (8) ◽  
pp. 814-819
Author(s):  
Zhiyuan Lin ◽  
Jinhua Li ◽  
Ke Feng ◽  
Yue Wang ◽  
Xueying Chu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Morphology Control ◽  
Surface Ligands ◽  
Cdse Nanorods

A novel hot-tamping process for producing an improved quality of coke

2019 ◽  
Vol 116 (6) ◽  
pp. 637
Author(s):  
Keliang Pang ◽  
Dongjie Liu ◽  
Ji Wu ◽  
Cai Liang ◽  
Jiliang Ma ◽  
...  
Keyword(s):  
Pore Structure ◽  
Small Volume ◽  
Crystal Surface ◽  
Microcrystalline Structure ◽  
Thermal Strength ◽  
Crystal Face ◽  
Carbon Structure ◽  
Coke Reactivity ◽  
Graphitization Degree

To produce superior quality of coke as compared to traditional cokemaking technologies, a novel hot-tamping technique has been developed. The quality of produced coke was assessed based on the reactivity, pore structure and microcrystalline structure. The results confirmed that the hot tamping coking process produced cokes with superior qualities as compared to traditional cokemaking and cold tamping coking. The hot-tamping cokes have good gloss, compact carbon structure, strong thermal strength and small volume of medium and small pores. This will reduce the coke reactivity by 3–4% when compared with traditional cokemaking process. The hot tamping cokes have the smallest spacing of the crystal face layers with the highest stacking height, diameter, crystal surface size, and graphitization degree that was hardly observed for the cokes from traditional cokemaking and cold tamping coking.

Effect of Surface Ligands and Device Configurations on Performance of PbS Colloidal Quantum Dot Solar Cells

2019 ◽  
Vol 40 (2) ◽  
pp. 215-223
Author(s):  
高文辉 GAO Wen-hui ◽  
翟光美 ZHAI Guang-mei ◽  
张彩峰 ZHANG Cai-feng ◽  
邵智猛 SHAO Zhi-meng ◽  
郑露露 ZHENG Lu-lu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Surface Ligands ◽  
Quantum Dot Solar Cells ◽  
Colloidal Quantum Dot ◽  
Effect Of Surface
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