Splitting of X-ray diffraction peak in (Ge:SiO2)/SiO2 multilayers

Li, J; Wu, Xiaohong; Hu, Dafeng; Yang, Yimin; Qiu, Teng; Jin, Shangtai

doi:10.1016/j.ssc.2004.04.026

Cited by 30 publications

(14 citation statements)

References 15 publications

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“…Considering the literature reports on the stress-induced peak splitting for non ice systems [19][20][21][22][23][24][25] and for ice VII, 16 it is reasonable to suggest that the peak splitting observed in our study is a result of strain created during water-to-ice transformation. Indeed, stresses could be expected when growing ice crystals met at the interface with each other or a container wall, because water-to-ice transformation is accompanied by an approximately 10% volume increase.…”

Section: Resultssupporting

confidence: 52%

Synchrotron X-ray Diffraction Investigation of the Anomalous Behavior of Ice During Freezing of Aqueous Systems

et al. 2009

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Simple aqueous systems, i.e., phosphate-glycine buffers and pure water, were studied at subambient temperatures by X-ray difractometry using a high-intensity synchrotron radiation source at the Advanced Photon Source of Argonne National Laboratory. Complex X-ray diffraction (XRD) patterns, with two or more poorly resolved peaks in place of each of the four diagnostic peaks of hexagonal ice, 100, 002, 101, and 102, referred as "splitting", were observed in the majority of cases. The splitting of up to 0.05 A (d-spacing) was detected for 100, 002, and 101 peaks, whereas 102 peak was less affected. Deformation of the lattice of hexagonal ice, probably due to local stress created on the ice/ice or ice/container interface during water-to-ice transformation, is proposed as a possible mechanism for the observed splitting of XRD peaks. Using molecular modeling, it was estimated that the observed shifts in the peak positions are equivalent to applying a hydrostatic pressure of 2-3 kbars. The splitting can be used to quantify stresses during freezing, which could improve our understanding of the role of water-to-ice transformation on the destabilization of proteins and other biological systems.

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Section: Resultssupporting

confidence: 52%

Synchrotron X-ray Diffraction Investigation of the Anomalous Behavior of Ice During Freezing of Aqueous Systems

et al. 2009

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“…The XRD peak splitting commonly corresponds to the existence of stresses, as reported in various studies, such as ice freezing and multilayered film. 31,32 According to the method reported by Varshney et al, the stress value is~200 MPa. 33 In the current situation, the frame-like structure covered by a thin Au film may create an unusual stress because the thick frame may serve as a support to pin the deformation of the central Au layer.…”

Section: Stress In Au Nanoframesmentioning

confidence: 99%

Gold nanorings synthesized via a stress-driven collapse and etching mechanism

Fang

Tian

et al. 2016

NPG Asia Mater

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Toroidal Au or Ag nanostructures are of particular interest due to their unique optical responses and superior catalytic applications. However, the fabrication of ring-like Au or Ag nanostructures is limited to either electron beam lithography or template techniques, thus hampering their applications. Here, we present a new stress-driven structure collapse and etching mechanism to synthesize Au nanorings via a direct one-pot solution-based chemical reaction. The nanoparticle-mediated recrystallization process contributes to the formation of Au nanoframes, which contain unusual stress, thus promoting the breakup of the nanoframes and finally converting them into Au nanorings. The Au nanorings with tunable hole sizes exhibit interesting localized surface plasmon features owing to the coupling of bonding and antibonding modes on the inner and outer surfaces of the nanorings. This facile approach may open the door for the preparation of toroidal nanostructures in other compositions for numerous applications.

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“…This residual strain may also indicate onset of amorphization of the NaAlH 4 crystalline phase by microwave irradiation. Doublet peaks or splitting of the peaks [15] in the NaAlH 4 phase are a common phenomenon observed among the microwave treated samples from Batch 2. This could be attributed to residual stress in the crystallographic structure of NaAlH 4 due to atom vibrations influenced by microwave irradiation.…”

Section: Resultsmentioning

confidence: 99%