Results 1 to 10 of about 1,706,590 (302)

Impact of Surface Trap States on Electron and Energy Transfer in CdSe Quantum Dots Studied by Femtosecond Transient Absorption Spectroscopy [PDF]

Nanomaterials, 2023
The presence of surface trap states (STSs) is one of the key factors to affect the electronic and optical properties of quantum dots (QDs), however, the exact mechanism of how STSs influence QDs remains unclear. Herein, we demonstrated the impact of STSs
Hongbin Dou, Chunze Yuan, Ruixue Zhu, Lin Li, Jihao Zhang, Tsu-Chien Weng   +5 more
doaj   +2 more sources

Cavity-enhanced detection of transient absorption signals [PDF]

EPJ Web of Conferences, 2020
We present a simple, high-duty-cycle, cavity-enhanced optical absorption measurement technique based on delay-limited Pound-Drever-Hall (PDH) sideband locking.
Rodrigues-Machado Fernanda C., Pestre Pauline, Scanlon Liam, Enger Shirin A., Sankey Jack C., Childress Lilian I.   +5 more
doaj   +1 more source

Multiphoton Resonance in Attosecond Transient Absorption

Photonics, 2022
We present the theory and simulation of attosecond transient absorption in helium atoms under the single-active-electron approximation. This study investigates the attosecond dynamics of intrinsic atomic states that interact with a field comprising ...
Jinxing Xue, Meng Wang, Cangtao Zhou, Shuangchen Ruan   +3 more
doaj   +1 more source

Photophysical Properties of Some Naphthalimide Derivatives

Engineering Proceedings, 2022
Naphthalimide derivatives possess many interesting properties such as strong emission, high quantum efficiency, good photostability, thermal stability, etc.
Radu Ionut Tigoianu, Anton Airinei, Florentina Georgescu, Alina Nicolescu, Calin Deleanu   +4 more
doaj   +1 more source

Synthesis and Characterizations of 5,5′‐Bibenzo[rst]pentaphene with Axial Chirality and Symmetry‐Breaking Charge Transfer

Advanced Science, 2022
Exploration of novel biaryls consisting of two polycyclic aromatic hydrocarbon (PAH) units can be an important strategy toward further developments of organic materials with unique properties.
Xiushang Xu, Suman Gunasekaran, Scott Renken, Lorenzo Ripani, Dieter Schollmeyer, Woojae Kim, Massimo Marcaccio, Andrew Musser, Akimitsu Narita   +8 more
doaj   +1 more source

Acoustic Vibration Modes of Gold–Silver Core–Shell Nanoparticles

Chemosensors, 2022
Bimetallic Au/Ag core–shell cuboid nanoparticles (NPs) exhibit a complex plasmonic response dominated by a dipolar longitudinal mode and higher-order transverse modes in the near-UV, which may be exploited for a range of applications.
Tadele Orbula Otomalo, Lorenzo Di Mario, Cyrille Hamon, Doru Constantin, Francesco Toschi, Khanh-Van Do, Vincent Juvé, Pascal Ruello, Patrick O’Keeffe, Daniele Catone, Alessandra Paladini, Bruno Palpant   +11 more
doaj   +1 more source

"TRANSIENT ABSORPTION OF GOLD NANOPARTICLES OF VARIOUS DIAMETERS "

Eurasian Physical Technical Journal, 2022
The transient absorption of gold nanoparticles with an average diameter of 13±5 and 48±16 nm upon photoexcitation by nanosecond laser pulses has been studied.
N.Kh. Ibrayev, E.V. Seliverstova, A.E. Kanapina   +2 more
doaj   +1 more source

Femtosecond Spectroscopy on a Dibenzophenazine‐Cored Macrocycle Exhibiting Thermally Activated Delayed Fluorescence

ChemistryOpen, 2023
The photophysics of a thermally activated delayed fluorescence (TADF) emitting macrocycle consisting of two dibenzo[a,j]phenazine acceptor moieties bridged by two N,N,N’,N’‐tetraphenylene‐1,4‐diamine donor units was scrutinized in solution by steady ...
Dr. Kristoffer A. Thom, Oliver Nolden, Dr. Oliver Weingart, Dr. Saika Izumi, Prof. Dr. Satoshi Minakata, Prof. Dr. Youhei Takeda, Prof. Dr. Peter Gilch   +6 more
doaj   +1 more source

Small-Polaron Hopping and Low-Temperature (45–225 K) Photo-Induced Transient Absorption in Magnesium-Doped Lithium Niobate

Crystals, 2020
A strongly temperature-dependent photo-induced transient absorption is measured in 6.5 mol% magnesium-doped lithium niobate at temperatures ranging from 45 K to 225 K.
Simon Messerschmidt, Andreas Krampf, Laura Vittadello, Mirco Imlau, Tobias Nörenberg, Lukas M. Eng, David Emin   +6 more
doaj   +1 more source

Room-Temperature Transient Absorption in KDP Crystal Under Exposure to Nanosecond Laser at 355 nm

IEEE Photonics Journal, 2018
Defects in high-purity optical materials produced by high-power laser irradiation have attracted much attention, which could modify material properties and cause degradation or even laser damage of optical components.
F. Geng, Q. Xu, F. R. Wang, H. D. Xia, J. B. Wen, J. Huang, X. D. Jiang   +6 more
doaj   +1 more source