GIWAXS - Revision history

KevinYager at 16:08, 24 January 2015

2015-01-24T16:08:34Z

KevinYager at 16:02, 24 January 2015

2015-01-24T16:02:37Z

KevinYager at 19:25, 3 December 2014

2014-12-03T19:25:23Z

KevinYager at 13:30, 16 October 2014

2014-10-16T13:30:20Z

KevinYager: /* Tungsten-Nickel alloy */

2014-10-14T21:32:35Z

‎Tungsten-Nickel alloy

KevinYager: /* Rubrene */

2014-10-14T21:32:28Z

‎Rubrene

KevinYager: /* Rubrene: */

2014-10-14T21:32:21Z

‎Rubrene:

KevinYager: /* Example Data */

2014-10-14T21:32:08Z

‎Example Data

KevinYager at 21:12, 14 October 2014

2014-10-14T21:12:55Z

KevinYager at 21:12, 14 October 2014

2014-10-14T21:12:19Z

@@ Line 1: / Line 1: @@
 '''Grazing-Incidence Wide-Angle X-ray Scattering''' ('''GIWAXS''') is a structural measurement technique wherein wide-angle [[scattering]] is collected; i.e. large values of the [[momentum transfer]]. Because of the [[Fourier transform|inverse nature]] of [[reciprocal-space]], these large values of ''[[q]]'' [[Q value|correspond]] to small distances; [[WAXS]] generically probes molecular length-scales. It is thus the wide-angle analogue of [[GISAXS]].
-There is no unambiguous delineation between [[WAXS]] and [[SAXS]]; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> ([[realspace]] distances from 6 nm to Angstroms).
+There is no [[Definitional_boundaries#Angle_ranges|unambiguous delineation]] between [[WAXS]] and [[SAXS]]; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> ([[realspace]] distances from 6 nm to Angstroms).
 ==Example Data==

← Older revision		Revision as of 16:02, 24 January 2015
Line 1:		Line 1:
−	'''Grazing-Incidence Wide-Angle X-ray Scattering''' ('''GIWAXS''') is a structural measurement technique wherein wide-angle [[scattering]] is collected; i.e. large values of the [[momentum transfer]]. Because of the [[Fourier transform\|inverse nature]] of [[reciprocal-space]], these large values of ''q'' [[Q value\|correspond]] to small distances; [[WAXS]] generically probes molecular length-scales. It is thus the wide-angle analogue of [[GISAXS]].	+	'''Grazing-Incidence Wide-Angle X-ray Scattering''' ('''GIWAXS''') is a structural measurement technique wherein wide-angle [[scattering]] is collected; i.e. large values of the [[momentum transfer]]. Because of the [[Fourier transform\|inverse nature]] of [[reciprocal-space]], these large values of ''[[q]]'' [[Q value\|correspond]] to small distances; [[WAXS]] generically probes molecular length-scales. It is thus the wide-angle analogue of [[GISAXS]].

	There is no unambiguous delineation between [[WAXS]] and [[SAXS]]; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> ([[realspace]] distances from 6 nm to Angstroms).		There is no unambiguous delineation between [[WAXS]] and [[SAXS]]; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> ([[realspace]] distances from 6 nm to Angstroms).

← Older revision		Revision as of 19:25, 3 December 2014
Line 1:		Line 1:
−	'''Grazing-Incidence Wide-Angle X-ray Scattering''' ('''GIWAXS''') is a structural measurement technique wherein wide-angle [[scattering]] is collected; i.e. large values of the [[momentum transfer]]. Because of the [[Fourier transform\|inverse nature]] of [[reciprocal-space]], these large values of ''q'' [[Q value\|correspond]] to small distances; [[WAXS]] generically probes molecular length-scales.	+	'''Grazing-Incidence Wide-Angle X-ray Scattering''' ('''GIWAXS''') is a structural measurement technique wherein wide-angle [[scattering]] is collected; i.e. large values of the [[momentum transfer]]. Because of the [[Fourier transform\|inverse nature]] of [[reciprocal-space]], these large values of ''q'' [[Q value\|correspond]] to small distances; [[WAXS]] generically probes molecular length-scales. It is thus the wide-angle analogue of [[GISAXS]].

	There is no unambiguous delineation between [[WAXS]] and [[SAXS]]; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> ([[realspace]] distances from 6 nm to Angstroms).		There is no unambiguous delineation between [[WAXS]] and [[SAXS]]; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> ([[realspace]] distances from 6 nm to Angstroms).

@@ Line 1: / Line 1: @@
 '''Grazing-Incidence Wide-Angle X-ray Scattering''' ('''GIWAXS''') is a structural measurement technique wherein wide-angle [[scattering]] is collected; i.e. large values of the [[momentum transfer]]. Because of the [[Fourier transform|inverse nature]] of [[reciprocal-space]], these large values of ''q'' [[Q value|correspond]] to small distances; [[WAXS]] generically probes molecular length-scales.
-There is no unambiguous delineation between WAXS and SAXS; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> ([[realspace]] distances from 6 nm to Angstroms).
+There is no unambiguous delineation between [[WAXS]] and [[SAXS]]; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> ([[realspace]] distances from 6 nm to Angstroms).
 ==Example Data==

@@ Line 15: / Line 15: @@
 ===Tungsten-Nickel alloy===
 The many bright rings arise from the well-defined atomic [[unit cell]. The peaks appear at large ''q'' (a.k.a. large angle), because they arise from small (atomic) distance-scales. The peaks are sharp, indicative of large grains; in fact they appear somewhat speckled, indicative of a well-ordered material.
 [[Image:TungstenNickel.png|300px]]

@@ Line 19: / Line 19: @@
 ===Rubrene===
 Notice the well-defined peaks through the WAXS. These diffraction peaks appear as spots (as opposed to rings) because the material is well-oriented with respect to the substrate. Instead of ordering in an isotropic manner, this sample has a very well-defined crystallographic orientation with respect to the substrate (because of epitaxial substrate growth).
 [[Image:Rubrene GIWAXS example.png|300px]]
 ==See Also==
 * [[GISAXS]]

@@ Line 4: / Line 4: @@
 ==Example Data==
+===P3HT===
-* Different representations of data from a [[P3HT]] thin film
+Different representations of data from a [[P3HT]] thin film. The fairly broad rings are consistent with the small grain sizes (~20 nm) in this material. The P3HT lamellar-stacking peaks (100, 200, 300) are concentrated along the vertical, due to the preferentially 'edge-on' orientation of this material, with respect to the substrate.
 {|
 |-
@@ Line 13: / Line 13: @@
 |}
-* A Tungsten-Nickel alloy:
+===Tungsten-Nickel alloy===
+The many bright rings arise from the well-defined atomic [[unit cell]. The peaks appear at large ''q'' (a.k.a. large angle), because they arise from small (atomic) distance-scales. The peaks are sharp, indicative of large grains; in fact they appear somewhat speckled, indicative of a well-ordered material.
 [[Image:TungstenNickel.png|300px]]
-* A thin film of rubrene:
+===Rubrene:===
 [[Image:Rubrene GIWAXS example.png|300px]]
 ==See Also==
 * [[GISAXS]]

@@ Line 3: / Line 3: @@
 There is no unambiguous delineation between WAXS and SAXS; generally speaking, WAXS corresponds to angles from approximately 1° to 45°, or ''q''-values from 0.1 Å<sup>−1</sup> to 5 Å<sup>−1</sup> (6 nm to Angstroms).
 {|
 |-
 | [[Image:P3ht calibration01.png|thumb|200px|Raw detector image.]]
@@ Line 10: / Line 12: @@
 | [[Image:P3ht calibration03.png|thumb|200px|Data converted to ''q''-space, taking into account the [[Ewald sphere]] (notice the '[[GI missing wedge|missing wedge]]' near the [[specular axis|q<sub>z</sub> axis]]).]]
 |}
 ==See Also==
 * [[GISAXS]]