Results 161 to 170 of about 118,063 (307)

Investment in diamonds

, 2010
This bachelor thesis deals with new investment commodity - diamonds. Especially in the Czech capital market diamonds are not known and widely used investment. But this is a new conservative investment with growing value.
Dvořáková, Lucie
core  

Origin identification of rough diamonds using impurity composition from polished diamonds

Among the typomorphic features of rough diamonds, only the defect-impurity composition is preserved after their processing into jewelry diamonds. In this study, 60 samples from three different deposits of the Yakutian diamond province were examined.
M. A. Fedotova, M. A. Ivanov, S. P. Leontyev, D. G. Everstova   +3 more
core   +1 more source

Active Phase of Nickel Electrocatalysts Driving Alkaline Hydrogen Evolution

Advanced Materials, EarlyView.
Using depth‐resolved and operando spectroscopic measurements coupled with electrochemical mass spectrometry, the authors uncover the critical role of sub‐surface oxidised species in increasing the activity and durability of Ni‐based cathodes for hydrogen evolution.
Yifeng Wang, Eleanor Ender, Santosh Kumar, Cindy Tseng, Guangmeimei Yang, Boxi Ye, Caiwu Liang, Youli Yu, Norton West, Inderjeet Chauhan, Jun H. Ng, Sid Halder, Sang Gu Ji, Georg Held, Mary P. Ryan, Katie L. Moore, Alex S. Walton, Reshma R. Rao   +17 more
wiley   +1 more source

Olivine and Fe-isotopes in kimberlites indicate an iron-rich substrate for CLIPPIR and other sub-lithospheric diamonds. [PDF]

Nat Commun
Howarth GH, Giuliani A, Tau MM, Cai R, Liu J.   +4 more
europepmc   +1 more source

Beyond Nanoporosity: A CO2‐Conditioned Glassy Matrix Contributes to the Brittle‐to‐Ductile Transition of Nanocellular Polyetherimide

Advanced Materials, EarlyView.
The mechanical performance of nanocellular polyetherimide cannot be explained by nanoporosity alone. It is shown that CO2 saturation and desorption leave a distinct mechanical signature in the glassy matrix before foaming. This matrix contribution provides a new route to understand and optimize the brittle to ductile transition in nanocellular polymers.
Félix Lizalde‐Arroyo, Frederik Van Loock, Victoria Bernardo, Tuuli Peltola, René Bes, Alberto Tena, Miguel Ángel Rodríguez‐Pérez, Judith Martín‐de León   +7 more
wiley   +1 more source

Trace element systematics constrain the origin of fluids that form gem-quality diamonds. [PDF]

Commun Earth Environ
Rakipov A, Woodland AB, Nestola F, Galiè M, Pamato MG, Novella D, Day MC, Erhardt T, Müller W.   +8 more
europepmc   +1 more source

Diamonds and diamond sorting

, 1984
Eleazer Bromberg, Francis Sullivan
openaire   +1 more source

Ion Concentration and Voltage Imaging With Fluorescent Nanodiamonds

Advanced Materials, EarlyView.
We demonstrate reversible switching between the fluorescent NV0 and the dark NV+ state, in sub‐30 nm FNDs via surface oxidation and hydrogenation, respectively. In an electrochemical cell, we show that the fluorescence from hydrogenated particles enables all‐optical imaging of voltages and ion concentrations at the micrometer scale.
Patrick Voorhoeve, Alessandro Mameli, Hiroshi Abe, Takeshi Ohshima, Qiang Sun, Anita Quigley, Rob Kapsa, Nikolai Dontschuk, Philipp Reineck   +8 more
wiley   +1 more source

Diamonds as an investment option

, 2013
This paper aims to explore the diamonds investment industry and how diamonds fare as a hedge against inflation. Firstly, an examination of the various efforts undertaken by certain organizations in improving the diamonds investment industry is carried ...
Shun, Herman Han-Ming, Tan, Candice Hui Ting, Yang, Chomel Yuqi   +2 more
core  

Spectrally Programmable Spin‐Polarized Photocurrents in WSe2–NiPS3 Magnetic van der Waals Heterostructures

Advanced Materials, EarlyView.
Heterostructure photodiode devices of p‐type WSe2 with n‐type NiPS3 constructs spectrally protected spin‐polarized photocurrents. The energy of the excitation photon serves as an independent control parameter for spin‐selective photocurrent generation. ABSTRACT Efficient generation and control of spin‐polarized currents in semiconductors remain central
Rajesh Kumar Yadav, Michal Poplinger, Adi Levi, Adi Harchol, Nirman Chakraborty, Thomas Brumme, Thomas Heine, Efrat Lifshitz, Doron Naveh   +8 more
wiley   +1 more source