Results 111 to 120 of about 1,320,406 (342)

Acetonitrile Ion Suppression in Atmospheric Pressure Ionization Mass Spectrometry

Journal of the American Society for Mass Spectrometry, 2016
Efforts to analyze trace levels of cyclic peroxides by liquid chromatography/mass spectrometry gave evidence that acetonitrile suppressed ion formation.
K. Colizza, Keira E. Mahoney, Alexander Yevdokimov, James L. Smith, J. Oxley   +4 more
semanticscholar   +1 more source

Facet‐Specific PbS Quantum Dot Passivation Using Halide Perovskites for SWIR Photodetectors

Advanced Materials Interfaces, EarlyView.
PbS quantum dots (QDs) are emerging as powerful short‐wave infrared photodetectors, yet the passivation mechanism of large QDs by perovskites ‐ critical for their stability ‐ remains unexplained. Here, we unveil the ligand structure of CH3NH3PbI3 (MAPI)‐passivated 4‐nm PbS QDs using FTIR, XPS, SEM, NMR, and DFT.
L. Paillardet, M. Gromova, D. Liu, A. S. Vasenko, O. V. Prezhdo, S. Alarab, G. De Paëpe, G. Lefevre, S. Charlot, O. Gourhant, B. Mortini, P. Reiss, J.‐M. Verilhac, D. Aldakov   +13 more
wiley   +1 more source

Ionization of polyisobutylene derivatives by atmospheric pressure photoionization (APPI)

, 2015
In my experiment, different polyisobutylene derivatives were studied. These derivatives are the following: olefin telechelic, chloride telechelic, hydroxyl telechelic and chloride terminated polyisbulylene (PIB).
El-shaddai Adamu, Daudu
core  

Computation of electron precipitation atmospheric ionization : updated model CRAC-EPII [PDF]

, 2017
A new model of the CRAC family, CRAC:EPII (Cosmic Ray Atmospheric Cascade: Electron Precipitation Induced Ionization) is presented. The model allows one to calculate atmospheric ionization induced by precipitating electrons.
Artamonov, Anton, Kovaltsov, Genady, Usoskin, Ilya, Mishev, Alexander, Mironova, Irina   +4 more
core  

Correlations between experimental and theoretical adiabatic ionization energies for organic compounds and rate constants for atmospheric reactions with hydroxyl radicals

, 2010
Adiabatic ionization energy (AIE) calculations were performed at the AM1, PM3, PM6, PDDG, HF/QZVP, and B3LYP/QZVP levels of theory on 722 atmospherically relevant organic compounds with available experimental rate constants for atmospheric reactions with
Sierra Rayne, Kaya Forest
core   +2 more sources

An Ultra‐Reliable and Highly Sensitive Flexible Piezoelectric Pressure Sensor Based on Vertically Aligned Gallium Nitride Microrod Arrays on Graphene

Advanced Materials Interfaces, EarlyView.
A flexible and highly reliable piezoelectric pressure sensor based on GaN p–n homojunction microrod arrays on graphene is demonstrated. The sensor exhibits high sensitivity, rapid response, excellent cyclic durability, and stable performance after thermal aging and PBS immersion, highlighting its potential for harsh‐environment and biomedical pressure ...
Asad Ali, Han Ik Kim, Seokje Lee, Imhwan Kim, Hongseok Oh, Gyu‐Chul Yi   +5 more
wiley   +1 more source

Benchmarking Coaxial and Angular Optical Emission Spectroscopy With Recommendations for Reliable Compositional In Situ Monitoring During Laser Powder Bed Fusion

Advanced Materials Technologies, EarlyView.
ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel, Bastian Jülich, Anna Rosa Ziefuss, Florian Eibl, Stephan Barcikowski   +4 more
wiley   +1 more source

Configuration, optimization and evaluation of a novel instrumental platform for automated SPE-LC-MS/MS analysis of drugs in whole blood [PDF]

, 2013
The thesis describes the configuration, optimization and evaluation of a novel instrumental platform for fully automated SPE-LC-MS/MS analysis of small molecules, such as drugs, in whole blood. The immunosuppressant Cyclosporine A was chosen as a model
Yu, Qianqian
core  

Atmospheric-pressure ionization and fragmentation of peptides by solution-cathode glow discharge

Chemical Science, 2016
Ionization and tunable fragmentation of peptides at atmospheric pressure was achieved by means of a solution-cathode glow discharge ionization source.
A. J. Schwartz, J. Shelley, Courtney L. Walton, K. Williams, G. Hieftje   +4 more
semanticscholar   +1 more source

Turning Water Into a Tool: From Degradation Pathways to Functional Engineering in Halide Perovskites

Advanced Materials Technologies, EarlyView.
Water exhibits a threshold‐dependent dual role in lead halide perovskites, acting either as a degradation trigger or as a powerful tool for defect passivation, recrystallization, and structural engineering. This review discusses how controlled water‐mediated interactions govern stability, dimensionality, and optoelectronic performance, providing ...
Raphaella T. S. Gonçalves, Gabriela O. Gera, Aryane Tofanello, Jose A. Souza, Andre L. M. Freitas   +4 more
wiley   +1 more source