Results 201 to 210 of about 197,633 (265)

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

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Atomic absorption spectroscopy

Journal of the American Oil Chemists' Society, 1968
AbstractAtomic absorption spectrophotometry has been used for the rapid determination of various metallic and nonmetallic elements in crude and refined vegetable oils and in animal fats, many present in levels of parts per million. Various types of crude and refined vegetable oils were analyzed for Ca, Cu, Fe, Mg, Mn, P and Zn.
B, Piccolo, R T, O'Connor
openaire   +2 more sources

Atomic absorption with ultracold atoms

Spectrochimica Acta Part B: Atomic Spectroscopy, 1999
Abstract Recent advances in laser-atom cooling techniques and diode-laser technology now allow one to conduct an idealised atomic absorption experiment comprising a sample of ultracold, quasi-stationary absorbing atoms and a source of near-monochromatic resonant light.
Hannaford, P., McLean, R. J.
openaire   +2 more sources

Atomic Absorption Spectrophotometry

Medicine, Science and the Law, 1973
Historically flame emission spectroscopy was developed first. Routine analysis showed the advantage of measuring absorption over emission for many metals. Instrumentation requirements are:— 1. Pressure regulators and flowmeters with the sources of gases; 2. Atomizer; 3.
openaire   +2 more sources

Determination of scandium by atomic absorption

Talanta, 1968
A comprehensive study has been made of the determination of scandium by atomic absorption. In addition to the instrumental variables such as flame-height, slitwidth and lamp current, a number of solution variables have been studied including the effect of anions (chloride, sulfate, nitrate, and fluoride), organic solvents, and other metals on the ...
O H, Kriege, G G, Welcher
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Atomic Absorption, Theory*

1999
The theory of atomic absorption spectroscopy is presented, covering atom production, atomic absorption and emission line shapes, and methods for calibration and for dealing with interferences. © 1999 Elsevier Ltd All rights reserved.
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Correction for background absorption in atomic absorption spectrometry with carbon atomizers

Analytica Chimica Acta, 1973
Abstract In atomic absorption, analytical errors arise in the pretreatment steps with carbon atomizers. A procedure is described wherein the entire sample is decomposed and atomized. The products are swept into an absorption tube where atomic absorption and molecular absorption measurements are made.
J.W. Robinson, G.D. Hindman, P.J. Slevin
openaire   +1 more source

Electrothermal Atomization for Atomic Absorption Analysis

Applied Spectroscopy, 1968
Some years ago, flame methods of spectrochemical analysis were very popular. In recent years atomic absorption in flames has been extensively applied to the analysis of both industrial and geologic materials. Now the application of electrically heated tubes for evaporation and atomization of samples promises to provide the basis for even greater ...
Ray Woodriff, Ronald W. Stone, Andrew M. Held   +2 more
openaire   +1 more source

Communication. Background atomic absorption in graphite furnace atomic absorption spectrometry

Journal of Analytical Atomic Spectrometry, 1986
Mesures de l'absorption du Mg (utilise comme modifiant de matrice sous forme de nitrate de magnesium) aux longueurs d'onde du Mn (279,5), du Pb (283,3), de Sn (286,4) et de Ga (287,4). Interference spectrale de fortes concentrations de Mg dans la zone 270-300 sous forme d'un effet d'absorption du ...
Lindesay R. Macdonald, Thomas C. O'Haver, Barbara J. Ottaway, John M. Ottaway   +3 more
openaire   +1 more source