2014/04/28 by D. A. Eurov, D. A. Kurdyukov, E. Yu. Stovpiaga +11
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advanced Fiber Optic Sensors #Chemistry #Composite material #Dispersity #Elastic modulus #Laser #Materials science #Mesoporous Materials and Catalysis #Mesoporous material #Mesoporous silica #Metallurgy #Nickel #Optics #Oscillation (cell signaling) #Photonic Crystals and Applications #Physics #Picosecond #SPHERES #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/0022-3727/47/33/335303
7 pages, 3 figures, 1 table
arxiv created 2014/04/28 · openalex publication_date 2014/07/18 · arxiv updated 2015/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use the picosecond acoustic pump-probe technique to study the elastic properties of monodisperse mesoporous silica spheres filled with nickel and deposited in the form of opal-like films on silica substrates. The picosecond pump-probe optical transmission signal shows harmonic oscillations corresponding to the lower energy radial Lamb mode in the vibrational spectrum of the spheres. These oscillations, with a frequency of several gigahertz last for several nanoseconds in the spheres with diameter 1050 nm, showing high homogeneity of the sphere parameters. By analysis of the oscillation spectrum of films with different sphere diameters and nickel content we obtain the elastic moduli of the mesoporous silica spheres.