Time-Resolved X-ray Diffraction Investigation of the Modified Phonon Dispersion in InSb Nanowires

Jurgilaitis, A.; Enquist, Henrik; Andreasson, Björn Pererik; Persson, Ann; Borg, Bertil; Caroff, Philippe; Dick, Kimberly A.; Harb, Maher; Linke, Heiner; Nüske, Ralf; Wernersson, Lars‐Erik; Larsson, Jörgen

doi:10.1021/nl403596b

Cited by 16 publications

(14 citation statements)

References 36 publications

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“…In contrast, for proteins, the data analysis aims to extract only largescale changes of global conformation, mainly because of the inherently limited spatial resolution of TRXL. Although a variety of large systems, such as metal nanoparticles (13,14), nanowires (15), metal thin films (16), and DNAs (17), have also been studied using time-resolved X-ray diffraction, only studies on small molecules and proteins are covered in this review (see Figure 1).…”

Section: Trxssmentioning

confidence: 99%

Ultrafast X-Ray Crystallography and Liquidography

Oang

Kim

et al. 2017

Annu. Rev. Phys. Chem.

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Time-resolved X-ray diffraction provides direct information on three-dimensional structures of reacting molecules and thus can be used to elucidate structural dynamics of chemical and biological reactions. In this review, we discuss time-resolved X-ray diffraction on small molecules and proteins with particular emphasis on its application to crystalline (crystallography) and liquid-solution (liquidography) samples. Time-resolved X-ray diffraction has been used to study picosecond and slower dynamics at synchrotrons and can now access even femtosecond dynamics with the recent arrival of X-ray free-electron lasers.

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Section: Trxssmentioning

confidence: 99%

Ultrafast X-Ray Crystallography and Liquidography

Oang

Kim

et al. 2017

Annu. Rev. Phys. Chem.

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“…In fact, there are experimental reports focusing on the changes in the phonon group velocity. 55,56 Kwon et al 2 showed that silicon and germanium nanostructures have certain critical values of thickness where the phonon transport phenomena drastically change into the confinement regime. Cuffe et al 55 observed phonon dispersion modification in sub-30-nm-thick Si nanofilms.…”

Section: Resultsmentioning

confidence: 99%

“…Cuffe et al 55 observed phonon dispersion modification in sub-30-nm-thick Si nanofilms. Jurgilaitis et al 56 measured phonon dispersion in 50-nm-thick InSb nanowires using time-resolved XRD and found that the speed of sound is only 74% of that in the bulk counterpart. They also found that the elastic constant was reduced by 35% compared to the bulk value.…”

Section: Resultsmentioning

confidence: 99%

Effect of phonon confinement on the thermal conductivity of In0.53Ga0.47As nanofilms

Kim

Kılıç

et al. 2018

Journal of Applied Physics

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Over the past few decades, significant progress has been made to manipulate thermal transport in solids. Most of the effort has focused on reducing the phonon mean free path through boundary scattering. Herein, we demonstrate that the phonon confinement effect can also be used as a tool for managing thermal transport in solids. We measured the thermal conductivities of 10-70-nm-thick In 0.53 Ga 0.47 As nanofilms and found that the thermal conductivities decrease as the film thickness decreases. However, the reasons for this reduction differ for films with different thicknesses. The thermal conductivity of the 30-and 70-nm-thick In 0.53 Ga 0.47 As nanofilms decreases because of severe phonon boundary scattering. Our analysis indicates that phonon confinement occurs in the 10-and 20-nm-thick In 0.53 Ga 0.47 As nanofilms, which modifies phonon dispersion leading to changes in the phonon group velocity and the Debye temperature. These experimental and theoretical results could help to elucidate the phonon confinement effect in nanomaterials as well as establish a platform for understanding nanoscale thermal physics.

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“…Ultrafast phenomena in materials can be excited by optical pulses with durations of femtoseconds to picoseconds, an excellent match for the characteristic timescales of processes relevant to materials processing and fundamental physical phenomena. Time-resolved x-ray diffraction methods enable the study of the physics of condensed matter systems, including ultrafast laser-induced lattice dynamics of oxide materials, [1][2][3][4] semiconductor lattice dynamics, 5,6 and the metal-insulator transition in VO 2 . 7 Several physical mechanisms result in the coupling of optical excitation to structural phenomena.…”

Section: Introductionmentioning

confidence: 99%

Spatially confined low-power optically pumped ultrafast synchrotron x-ray nanodiffraction

Park

Zhang

Chen

et al. 2015

Review of Scientific Instruments

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The combination of ultrafast optical excitation and time-resolved synchrotron x-ray nanodiffraction provides unique insight into the photoinduced dynamics of materials, with the spatial resolution required to probe individual nanostructures or small volumes within heterogeneous materials. Optically excited x-ray nanobeam experiments are challenging because the high total optical power required for experimentally relevant optical fluences leads to mechanical instability due to heating. For a given fluence, tightly focusing the optical excitation reduces the average optical power by more than three orders of magnitude and thus ensures sufficient thermal stability for x-ray nanobeam studies. Delivering optical pulses via a scannable fiber-coupled optical objective provides a well-defined excitation geometry during rotation and translation of the sample and allows the selective excitation of isolated areas within the sample. Experimental studies of the photoinduced lattice dynamics of a 35 nm BiFeO3 thin film on a SrTiO3 substrate demonstrate the potential to excite and probe nanoscale volumes.

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Time-Resolved X-ray Diffraction Investigation of the Modified Phonon Dispersion in InSb Nanowires

Cited by 16 publications

References 36 publications

Ultrafast X-Ray Crystallography and Liquidography

Ultrafast X-Ray Crystallography and Liquidography

Effect of phonon confinement on the thermal conductivity of In0.53Ga0.47As nanofilms

Spatially confined low-power optically pumped ultrafast synchrotron x-ray nanodiffraction

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