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5 days ago · Although the main emphasis of our study has been on the use of plasma source mass spectrometry, methods in-volving flame atomic absorption spectrometry, and gas chromatography (following derivatiza-tion) with microwave induced plasma atomic emission detection are also under development.
2 days ago · Ångström-scale terahertz time-domain spectroscopy is demonstrated in a lightwave-driven scanning tunnelling microscope. Employing a metal surface as a reference, local terahertz near-fields are ...
1 day ago · Transient absorption (TA) spectroscopy measurements were conducted under 600-nm excitation to investigate the photophysical details of the r-CQDs and the nir-CQDs in DMSO. As illustrated in Fig. 4A , the r-CQDs exhibited a photobleaching (PB) signal around 620 nm, corresponding to the surface-related core state, and a corresponding photoinduced absorption at 720 nm (fig. S19).
19 hours ago · There are different methods for Hg 2+ detection reported, like electrochemical sensing [4, 5], polymeric methods , inductive coupled plasma atomic spectroscopy and atomic absorption spectroscopy . Most of these methods need complex instrumentation or have limitations regarding sensitivity and selectivity, so their application towards onsite sensing is limited.
19 hours ago · Using an atomic absorption spectrophotometer (AAS) (Shimadzu Scientific Instrument Inc., Columbia, MD, USA), the amount of manganese in yeast cells was measured. An adapted version of Demirci and Pometto’s methodology was utilized to prepare samples for atomic absorption spectroscopy (AAS). After the yeast sample was centrifuged for 15 min at ...
1 day ago · In situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) further validated excellent interaction between Co active centers and O intermediates. Furthermore, the self-made rechargeable zinc-air battery demonstrated remarkable discharge peak power density (≈253 mW cm ‒2 ), energy density (≈819 mAh g ‒1 ), and cyclic stability exceeding 110 h.
4 days ago · There has been much effort to improve excited-state lifetimes in photosensitizers based on earth-abundant first-row transition metals. Copper(I) complexes have gained significant attention in this field, and in most cases, sterically driven approaches are used to optimize their lifetimes. This study presents a series of three-coordinate copper(I) complexes (Cu1–Cu3) where the excited-state lifetime is extended by triplet–triplet energy transfer. The heteroleptic compounds feature a ...
