scholarly journals Colloidal lead iodide nanorings

Nanoscale ◽  
2018 ◽  
Vol 10 (45) ◽  
pp. 21197-21208 ◽  
Author(s):  
Eugen Klein ◽  
Leonard Heymann ◽  
Ana B. Hungria ◽  
Rostyslav Lesyuk ◽  
Christian Klinke
Keyword(s):  
Formation Process ◽  
Optical Measurements ◽  
Synthesis And Characterization ◽  
Lead Iodide ◽  
Ring Structures ◽  
Colloidal Lead ◽  
20 Nm

We present the synthesis and characterization of PbI2 nanorings prepared via a direct colloidal route. The ring structures are obtained by etching as prepared PbI2 nanosheets with trioctylphosphine and possess thicknesses between 20 nm and 85 nm and lateral dimensions of up to 10 μm. The formation process was analyzed and discussed as well as the electrical and optical measurements.

Synthesis and Characterization of Methylammonium Lead Iodide Perovskite and its Application in Planar Hetero-junction Devices

2018 ◽  
Vol 33 (6) ◽  
pp. 065012 ◽  
Author(s):  
Aditi Upadhyaya ◽  
Chandra Mohan Singh Negi ◽  
Anjali Yadav ◽  
Saral K Gupta ◽  
Ajay Singh Verma
Keyword(s):  
Synthesis And Characterization ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide

Synthesis and Characterization of FePt Nanoparticle/Single Walled Carbon Nanotube Composites

2009 ◽  
Vol 620-622 ◽  
pp. 505-508 ◽  
Author(s):  
Yan Wang ◽  
Lian Gao ◽  
Jing Sun ◽  
Yang Qiao Liu
Keyword(s):  
Carbon Nanotube ◽  
Synthesis And Characterization ◽  
Fept Nanoparticles ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Nanotube Composites ◽  
Potential Applications ◽  
Carbon Nanotube Composites ◽  
20 Nm

We report the synthesis and characterization of FePt nanoparticles (NPs)/single walled carbon nanotube (SWNTs) nanocomposites, which might have important potential applications to orient CNTs and the development of new catalysts. The crystallite size of FePt NPs is about 2.5-4 nm and the Fe atom content ranges from 50% to 65%. HiPCO SWNTs have been decorated with FePt nanoparticles under mild conditions without any pretreatment. When the bundle size of HiPCO SWNTs is about 20 nm, FePt NPs mostly attach on the sidewalls of SWNTs. The loading of FePt nanoparticles on the SWNTs bundles can be conveniently controlled by adjusting the initial amount of FePt NPs. The nanocomposite showed magnetic properties in a magnetic field. TEM, HRTEM, and EDS spectra were performed to observe the nanostructure of these nanocomposites.

Synthesis and Characterization of Stabilized Tetragonal Nano Zirconia by Precipitation Method

2019 ◽  
Vol 56 ◽  
pp. 142-151
Author(s):  
Hassan Shokry ◽  
Marwa Elkady ◽  
Hesham Hamad
Keyword(s):  
Phase Transformation ◽  
Crystallite Size ◽  
Calcination Temperature ◽  
Average Crystallite Size ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Calcination Temperatures ◽  
Ft Ir ◽  
20 Nm

Nano sized ZrO2 nanopowder was synthesized by precipitation method. Phase transformation was investigated as a function of calcination temperature by XRD, SEM , and FT-IR. It is indicated that the thermal anneling from 400 to 800 °C resulted in increasing the average crystallite size from 12 to 20 nm. As the calcination temperature increased, the crystallite size and the agglomeration were increased. The increase in the monoclinic content and grain growth are caused by the calcination temperatures even calcination at 800 °C.

scholarly journals Electrical characterization of single nanometer-wide Si fins in dense arrays

2018 ◽  
Vol 9 ◽  
pp. 1863-1867 ◽  
Author(s):  
Steven Folkersma ◽  
Janusz Bogdanowicz ◽  
Andreas Schulze ◽  
Paola Favia ◽  
Dirch H Petersen ◽  
...  
Keyword(s):  
High Precision ◽  
Formation Process ◽  
Electrical Contact ◽  
Electrical Characterization ◽  
Critical Dimension ◽  
Electrical Measurement ◽  
Contact Formation ◽  
Dense Arrays ◽  
20 Nm

This paper demonstrates the development of a methodology using the micro four-point probe (μ4PP) technique to electrically characterize single nanometer-wide fins arranged in dense arrays. We show that through the concept of carefully controlling the electrical contact formation process, the electrical measurement can be confined to one individual fin although the used measurement electrodes physically contact more than one fin. We demonstrate that we can precisely measure the resistance of individual ca. 20 nm wide fins and that we can correlate the measured variations in fin resistance with variations in their nanometric width. Due to the demonstrated high precision of the technique, this opens the prospect for the use of μ4PP in electrical critical dimension metrology.

Synthesis and Characterization of Cux(In, Ga)ySez Nanoparticles by Colloidal Route

2004 ◽  
Vol 836 ◽  
Author(s):  
Ki-Hyun Kim ◽  
Young-Gab Chun ◽  
Byung-Ok Park ◽  
Kyung-Hoon Yoon
Keyword(s):  
Solar Cells ◽  
Inert Atmosphere ◽  
Synthesis And Characterization ◽  
Stoichiometric Ratio ◽  
Spherical Nanoparticles ◽  
Reaction Condition ◽  
Tube Type ◽  
20 Nm ◽  
Cigs Nanoparticles

ABSTRACTThe quarternary CIGS nanoparticles for absorber layer of solar cells have been synthesized with various mole ratios by colloidal route. The CIGS nanoparticles were prepared by reacting CuI, InI3, GaI3 in pyridine with Na2Se in methanol at 0°C under inert atmosphere. For Cu0.9In0.8Ga0.3Se2 and Cu0.9In0.7Ga0.4Se2 stoichiometric ratios, tube-type nanofibers were obtained with the widths in the range of 20–50 nm and lengths of 0.1–3 μm from reaction at 0°C for 20 min. For Cu1.1In0.68Ga0.23Se1.91, and Cu0.9In0.68Ga0.23Se1.91 ratios, spherical nanoparticles were obtained from the same reaction condition. As compared to particles from Cu0.9In0.68Ga0.23Se1.91 ratio, more uniform and smaller nanoparticles with diameter in the range of 5–20 nm were obtained from the Cu1.1In0.68Ga0.23Se1.91 stoichiometric ratio. The morphology change of the CIGS particles seems to be closely related to the ratio of Cu/(In, Ga).

scholarly journals Synthesis and Characterization of Neodymium Oxide in Silica Matrix by Solgel Protocol Method

2008 ◽  
Vol 2008 ◽  
pp. 1-4 ◽  
Author(s):  
Surender Duhan ◽  
Paveen Aghamkar ◽  
M. Singh
Keyword(s):  
Rare Earth ◽  
Ftir Spectroscopy ◽  
Structural Changes ◽  
Neodymium Oxide ◽  
Silica Matrix ◽  
Synthesis And Characterization ◽  
Thermal Treatments ◽  
Average Size ◽  
20 Nm

Formation of nanocrystalline rare earth was prepared by solgel route, using tetra-ethoxysilane and Nd (NO3)3 as precursor materials and HCl as a catalyst. The prepared samples were submitted to thermal treatments at temperature 500∘C (5 hours) and 800∘C (10 hours). Structural changes were investigated by XRD, FTIR spectroscopy, and SEM. At 800∘C (10 hours) resulted in the formation of cubic Nd2O3 nanocrystallites with average size ∼ 20 nm.

scholarly journals Sonochemical synthesis and characterization of lead iodide hydroxide micro/nanostructures

2014 ◽  
Vol 21 (1) ◽  
pp. 234-241 ◽  
Author(s):  
Farnosh Tavakoli ◽  
Masoud Salavati-Niasari ◽  
Fatemeh Mohandes
Keyword(s):  
Synthesis And Characterization ◽  
Lead Iodide ◽  
Sonochemical Synthesis
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