Results 1 to 10 of about 611,497 (214)

Gigantic blue shift of two-photon–induced photoluminescence of interpenetrated metal–organic framework (MOF) [PDF]

open access: yesNanophotonics, 2023
As an important means of modern science and technology, multiphoton fluorescence plays an essential role in high-resolution imaging, photochemistry, micro- and nano-processing and clinical diagnosis.
Chen Zhihui   +8 more
doaj   +2 more sources

Quantum Dot-Induced Blue Shift of Surface Plasmon Spectroscopy [PDF]

open access: yesNanomaterials, 2022
We experimentally demonstrate the spectral blue shift of surface plasmon resonance through the resonant coupling between quantum dots (QDs) and surface plasmons, surprisingly in contrast to the conventionally observed red shift of plasmon spectroscopy ...
Than Thi Nguyen   +4 more
doaj   +2 more sources

Coexistence of the Band Filling Effect and Trap-State Filling in the Size-Dependent Photoluminescence Blue Shift of MAPbBr3 Nanoparticles [PDF]

open access: yesNanomaterials
The size-dependent photoluminescence (PL) blue shift in organometal halide perovskite nanoparticles has traditionally been attributed to quantum confinement effects (QCEs), irrespective of nanoparticle size.
Jing Sun   +4 more
doaj   +2 more sources

High Hydrogen Ion Concentration Causes a Blue Shift in Gold Nanoparticles

open access: yesCrystals, 2021
In this research, our team used a rare electrochemical method to obtain gold nanoparticles (GNPs). The growth solution has been added with nitric acid in order to observe the effect of GNPs. The solution also included cetyltrimethylammonium bromide (CTAB)
Po-Yen Lin   +2 more
doaj   +3 more sources

Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. [PDF]

open access: yesPLoS ONE, 2014
The song of Antarctic blue whales (Balaenoptera musculus intermedia) comprises repeated, stereotyped, low-frequency calls. Measurements of these calls from recordings spanning many years have revealed a long-term linear decline as well as an intra-annual
Brian S Miller   +3 more
doaj   +2 more sources

Quntitative structure activity relationship (QSAR) of UV-visible spectrum of some different chalkons [PDF]

open access: yesشیمی کاربردی روز, 2013
  The UV-visible spectrum of some different chalkons with both electron with-drawing and electron-donating groups have been investigated. The results showed that electron with-drawing groups cause Blue-Shift and electron-donating groups cause Red-Shift.
Salman Rahmani, Ali Amoozadeh
doaj   +1 more source

Fabrication of Self-Assembling Carbon Nanotube Forest Fishnet Metamaterials

open access: yesNanomaterials, 2022
The investigation of the preparation of polystyrene (PS) nanosphere monolayers for the fabrication of carbon nanotube (CNT) forest fishnet metamaterial structures is studied in this paper, as a cheap alternative for top-down patterning methods.
Adam Pander   +3 more
doaj   +1 more source

Discovery of Stishovite in the Prismatine-Bearing Granulite from Waldheim, Germany: A Possible Role of Supercritical Fluids of Ultrahigh-Pressure Origin

open access: yesGeosciences, 2022
For the first time in the sixty years since the synthesis of stishovite, we report unambiguous evidence of stishovite formed in the deep Earth. A minimum pressure of about 7.5 GPa at 1000 °C is necessary for the formation of stishovite, corresponding to ...
Rainer Thomas   +3 more
doaj   +1 more source

Relation between Halogen Bond Strength and IR and NMR Spectroscopic Markers

open access: yesMolecules, 2023
The relationship between the strength of a halogen bond (XB) and various IR and NMR spectroscopic quantities is assessed through DFT calculations. Three different Lewis acids place a Br or I atom on a phenyl ring; each is paired with a collection of N ...
Akhtam Amonov, Steve Scheiner
doaj   +1 more source

Dynamic Responses of Cylindrical Whispering Gallery Mode Revealed by Axial Liquid Disturbance

open access: yesIEEE Photonics Journal, 2020
Cylindrical whispering gallery mode (WGM) microresonators have achieved much attention in the sensing field due to high sensitivity, compatibility and integration. The excitation of spiral modes in such a resonator is unavoidable, causing the axial field
Hongchun Zhao, Yue Wang, Yihui Wu
doaj   +1 more source

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