High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 11

$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 1$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 1

... PZN -x% PT: single crystal (S) or powder (P) P: 5 ...

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$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 2$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 2

... surface X- ray 44.65o ~43.0-44.0o 42 43 44 45 46 47 2 [010]W [100] L PZN- 4 .5% PT b) b) Fractured surface Intensity (arb units) X- ray X- ray 44. 62 42 43 44 45 o 46 47 2 Figure 5. 1 (0 02) XRD profiles of ... 44.94 ~43 .5- 44.8 42 43 o o 44 45 2 Figure 5. 4 Intensity (arb units) e) PZN- 9%PT Intensity (arb units) 45 2 2 46 47 42 44 .50 o 44.94o 44 .28 o 43 44 45 46 47 2 (a), (c) and (e) (0 02) XRD profiles ... one-sided shoulder extending from the main (0 02) R peak, its intensity typically decreasing continuously with decreasing 2 value in the mapping; (2) in addition to the extended spreading in the ω = 0°...

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$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 3$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 3

... consisted of highly distorted R phase owing to the soft elastic constants of R The distorted R phases are microscopic in size, of a wide range of lattice parameters and are stressed in intense ... to the poling treatment 5. 4 (a) Summary of main observations The cause for the occurrence of the extremely broad lower 2θ peak adjacent to the main (002)R peak in standard XRD profiles of (001)-orientated ... avoid a non-R phase or overpoling phenomenon as a result of E-field induced phase transformation in relaxor single crystals [1, 16, 90, 91] A different result was obtained when poling was applied...

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$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 4$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 4

... annealing at 600 °C for h and the position shifted further to 2θ ≈ 44 . 05 (Figure 5. 9) 69 as-polished 300oC (1h) ~44 .68 o R Intensity (arb units) 40 0oC (1h) 600oC (5h) ~44 . 05 ~43 .50 41 42 43 ... annealing treatments The heating and cooling rates used were 1 .5 ºC/min Figure 5. 9 shows the (002) XRD profiles of the differently annealed PZN- 4 .5% PT samples and the (002) XRD profile of the ... 41 42 43 o o 44 45 46 47 2θ Figure 5. 9 (002) XRD profiles of as-polished (solid curve) and differently annealed (dashed curves) PZN- 4 .5% PT showing the effects of the different annealing treatments...

$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 5$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 5

... RSM To explain how domain size may affect the (002) diffraction profiles, we begin with diffractions arising from untilted T microdomains By microscale domains, we mean here coarse domains of which ... micro/nanodomains T5 T6 T ω = 0° Figure 6.2 (002) diffraction intensity weighted distributions arising from (a) T microdomains, (b) interference effect of T nanodomains and (c) combined effect of (a) and ... 6.10a-b) reveals an extinction at P/A= 45 , while the remaining domains exhibited the optical extinction at P/A= 0° This suggests that the (R+T) two phases coexisted in unpoled PZN- 9%PT at room temperature...

$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 6$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 6

... projection of the coexistence of R micro- and nanotwins onto (002) RSM 112 coexistence of R micro- and nanotwin domains on (002) RSM 7.3 Evidence of rhombohedral micro/nanotwins in PZN- 4 .5% PT at ... domains, a result of the large diffraction width associated with the fine domain structure and the extreme compliant nature of the R phase The diffraction pattern indicating possible coexistence ... diffraction may indicate the occurrence of a new M phase Table 6. 1 gives the relationships between the m axes and the pc axes of the various M phases and the O phase Judging from the nature of...

$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 7$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 7

... and (b) PZN- 7% PT, and (c) and (d) PZN- 8%PT single crystals 1 27 sample of PZN- 7% PT and PZN- 8%PT, respectively, but of the same wafers as in Figures 8.1(a) and (c) These peaks lie in two different ... Ruling out both MB and MC phases being the viable phase, the peak(s) at 2θ ≈ 44-90- 45. 0° must arise from the (100)T domains We may thus conclude that “LT” phase in PZN- 8%PT (and hence PZN- 7% PT ... (R+T) phase mixture 8.3 Nature of rhomboedral and tetragonal micro-/nanotwin mixture in PZN( 7- 8)%PT at room temperature In the previous section, it has been shown that the (R+T) mixture exist in PZN- (7- 8)%PT...

$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 8$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 8

... (b) 85 ºC P/A= 0º P/A= 45 (c) 1 05 ºC P/A= 0º P/A= 45 (d) 1 45 ºC P/A= 0º P/A= 45 (e) 1 65 ºC P/A= 0º P/A= 45 (f) 1 68 ºC C P/A= 45 T C T P/A= 45 [100] 200 µm [010] Figure 8. 11 ZFH domain structures ... of (001)T twin diffractions in as-grown PZN- 6%PT single crystal may be due to the higher residual stress and/ or the presence of a much higher portion of T nanotwin domains in this crystal ... (Figure 8. 11a), indicating that the room temperature phase is the R phase The R phase remained till 85 ºC before the first sign of phase transformation (Figure 8. 11b) Gradual change in the extinction...

$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 9$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 9

... of the depolarization and R-T phase transformation events in poled PZN- PT single crystals PZN- 4 .5% PT and PZN- 7%PT single crystals, of [100]L×[010]W×[001]T in orientation and 6L×2W×0.35T mm3 in ... tilting of the R diffraction out of the ω = 0° plane indicates that both crystals existed in a strained state as the result of poling induced stresses This finding is supported by the work Liu and ... residual strain The effect of poling on the domain switching in PZN- 9% PT is shown in Figure 9. 4 It shows that both the (R+T) phases coexisted prior to the E-field application Upon increasing the E-field...

$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 10$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 10

... emergence of R-T phase transformation in PZN- PT single crystals, giving TR-T(L) ≅ TDP ≅1 05- 110 °C for PZN- 4 .5% PT and ≅90 -100 °C for PZN- 7%PT These results, including the upper bound values of TR-T, ... (b) 110 ºC, and (c) 1 15 ºC The intensity contours are in log scale T# indicates the vague T diffractions TNT denotes the T at ∆ω ≠ 0º 172 o ε' (x1 0 ) (a) 100 C ε' (x1 04) o (b) 1 05 C ε' (x1 04) ... 4 .5 ≅ 155 ≅1 05 ≅1 05 107 100 ≅120 ≅1 35 ≅1 65 ≅ 95 ≅90 ≅92 ≅1 15 ≅1 15 ≅1 05 [c] [d] [a] Determined from the ε’-temperature plot of [001]-poled crystals TR-T(L) is the temperature corresponding to the...

$High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 11$

High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 11

... crystal domains in single crystal relaxor ferroelectric, J Appl Phys., 87, p 8 159 -8164 2000 70 Yin, J and W Cao Domain configurations in domain engineered 0. 955 Pb(Zn1/3Nb2/3)O3-0.045PbTiO3 single crystals ... (001)T domains in PZN( 6-8)%PT crystals, which are shadowed by the R domains upon fracturing (b) To investigate the effects of temperature and E-field on the R and T micro- and nanotwin domains in ... detected in selected samples, suggesting that the R phase exist in a mixture of micro and nanotwins in PZN- (4. 5- 8)%PT single crystals at room condition (d) In addition to the R diffractions,...

$Báo cáo khoa học: An X-ray diffraction study of model membrane raft structures doc$

Báo cáo khoa học: An X-ray diffraction study of model membrane raft structures doc

... FEBS 4693 Membrane raft structure P J Quinn and C Wolf Fig Cartoons of the molecular composition of the different structures proposed for the lipid matrix model of membrane raft structure and their ... remodelling of lipid anchors is a recognized process in raft function [40,41] suggests that the conﬁguration of the raft anchors is a likely candidate The lipid matrix model of the membrane raft structure ... parent membrane of this order would be between and 30 nm in diameter This is at odds with the size of vesicles isolated as detergent-resistant membranes Estimates of the size of detergent-resistant...

Báo cáo y học: "A pilot study of rizatriptan and visually-induced motion sickness in migraineu"

... comparable study of visually-induced motion sickness We were especially interested in replicating and extending research by Drummond and Granston that showed that visually-induced motion sickness in ... herein extends this line of research by combining a visual motion sickness- inducing stimulus with pain and pre-treatment with rizatriptan In this study, rizatriptan does not appear to reduce visually-induced ... groups Motion sickness was not different between those subjects with a history of visually-induced motion sickness vs those subjects without a history of visually-induced motion sickness using the...

báo cáo khoa học: "Quantitative analysis of nanoparticle internalization in mammalian cells by high resolution X-ray microscopy" pps

... this article as: Chen et al.: Quantitative analysis of nanoparticle internalization in mammalian cells by high resolution X-ray microscopy Journal of Nanobiotechnology 2011 9:14 Submit your next ... uptake microanalysis by EMT cells after co-culturing with 500 μM naked AuNPs for 48 h The size distribution in A) was obtained by analyzing individual cells such as that in B) Bars in B: 10 μm ... required staining Figure shows that even without staining this imaging method can readily explore in detail the dissimilarities in the internalization of different AuNPs by different cell lines Specifically,...

X ray crystallographic study of yeast dcp1 and dcp2 proteins insights into the mechanism and regulation of eukaryotic mRNA decapping

... out by the Dcp1- Dcp2 holoenzyme Dcp2 is a Nudix pyrophosphatase and Dcp1 stimulates the activity of Dcp2 The crystal structures of yeast Dcp1 and Dcp2 proteins are presented in this study The structure ... function and regulation of the decapping proteins Dcp1 and Dcp2 Yet several questions still remain open regarding the decapping complex: 1) What is the structure of the Dcp1 protein and is the prediction ... both yeast and human Dcp2 proteins, the efficiency of decapping is in correlation with the length of the substrate It is hypothesized that the special separation of the RNA binding site and the decapping...

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