Blue and red shifted temperature dependence of implicit phonon shifts in Graphene [PDF]
Mater.Res.Express 4 (2017) 075038, 2017 We have calculated the implicit shift for various modes of frequency in a pure graphene sheet. Thermal expansion and Gr\"uneisen parameter which are required for implicit shift calculation have already been studied and reported. For this calculation, phonon frequencies are obtained using force constants derived from dynamical matrix calculated using ...
Sarita Mann, V K Jindal
arxiv +5 more sources
Dispersion blue-shift in an aperiodic Bragg reflection waveguide [PDF]
Optics Communications 365 (2016) 225-230, 2015 A particular feature of an aperiodic design of cladding of Bragg reflection waveguides to demonstrate a dispersion blue-shift is elucidated. It is made on the basis of a comparative study of dispersion characteristics of both periodic and aperiodic configurations of Bragg mirrors in the waveguide system, wherein for the aperiodic configuration three ...
Volodymyr I. Fesenko, Vladimir R. Tuz
arxiv +5 more sources
Importance of water and intramolecular interaction governs substantial blue shift of Csp2–H stretching frequency in complexes between chalcogenoaldehydes and water [PDF]
RSC Adv, 2022 Nguyen Thi Thanh Cuc +4 more
openalex +3 more sources
Fabrication of Self-Assembling Carbon Nanotube Forest Fishnet Metamaterials
Nanomaterials, 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
Quntitative structure activity relationship (QSAR) of UV-visible spectrum of some different chalkons [PDF]
شیمی کاربردی روز, 2013 Â 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
Geosciences, 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
Dynamic Responses of Cylindrical Whispering Gallery Mode Revealed by Axial Liquid Disturbance
IEEE 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
High Hydrogen Ion Concentration Causes a Blue Shift in Gold Nanoparticles
Crystals, 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 +1 more source
Understanding blue shift of the longitudinal surface plasmon resonance during growth of gold nanorods [PDF]
Nano Express 2 (2021) 010009, 2021 We have investigated in detail the growth dynamics of gold nanorods with various aspect ratios in different surrounding environments. Surprisingly, a blue shift in the temporal evolution of colloidal gold nanorods in aqueous medium has been observed during the growth of nanorods by UV visible absorption spectroscopy.
arxiv +1 more source
Relation between Halogen Bond Strength and IR and NMR Spectroscopic Markers
Molecules, 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