SAXS - Revision history

KevinYager: /* Applications */

2015-09-11T19:46:20Z

‎Applications

KevinYager: /* Disadvantages */

2015-09-11T19:44:40Z

‎Disadvantages

KevinYager: /* See Also */

2015-07-25T14:59:08Z

‎See Also

KevinYager: /* Characteristics */

2015-07-25T14:58:04Z

‎Characteristics

KevinYager: /* Advantages */

2015-07-25T13:08:07Z

‎Advantages

KevinYager: /* Applications */

2015-07-25T12:56:11Z

‎Applications

KevinYager at 12:53, 25 July 2015

2015-07-25T12:53:46Z

KevinYager at 12:44, 25 July 2015

2015-07-25T12:44:57Z

KevinYager: Created page with "AgBH). The Scattering_features#Rings|r..."

2015-07-25T12:42:00Z

New page

[[Image:Standard-AgBH-gisaxs th000 spot3 60sec SAXS.png|thumb|200px|right|Example scattering pattern (for [[Material:Silver behenate|AgBH]]). The [[Scattering_features#Rings|rings]] of scattering at well-defined angles arise from scattering off of the lamellar order in the sample.]]

'''Small-angle x-ray scattering''' ('''SAXS''') is a method to analyze the nanoscale structure of a sample by measuring the intensity of [[x-ray]]s [[scattering|scattered]] as a function of angle.

The classic, stereotypical, application of SAXS is to study the size and shape of particles dispersed in solution (including [[BioSAXS|biological macromolecules]]). In these cases, one typically reduces the 2D area [[detector]] image into a 1D curve (I vs. [[q]]), where the slope of the curve (and/or oscillations within it) encode information about the structure. SAXS can also be used to measure ordered nanoscale systems (e.g. nanoscale [[superlattice]]s), where one observes sharp peaks in the scattering data.

@@ Line 25: / Line 25: @@
 * Soft matter: polymers, colloids
 * [[Liquid crystal]]s
-* [[Block-copolymers]]
+* [[Lattices of nano-objects]]
-* Nanoscale [[superlattices]]
+** [[Block-copolymers]]
 * Nanocomposites, metals, minerals, etc.

@@ Line 17: / Line 17: @@
 ===Disadvantages===
-* Low information content: data fitting is an ill-posed problem, meaning that it is possible to be misled in data analysis.
+* Low information content: data fitting is an [[Fourier_transform#Phase_problem|ill-posed problem]], meaning that it is possible to be misled in data analysis.
 * Complex [[Tutorial:What to do with data|data analysis]].
 * Complex/expensive instrumentation.

← Older revision		Revision as of 14:59, 25 July 2015
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	*** [[GTSAXS\|Grazing-incidence Transmission SAXS]] ([[GTSAXS]]))		*** [[GTSAXS\|Grazing-incidence Transmission SAXS]] ([[GTSAXS]]))
	** Rotational SAXS ([[CD-SAXS]]), for reconstructing [[reciprocal-space]]		** Rotational SAXS ([[CD-SAXS]]), for reconstructing [[reciprocal-space]]
		+	* Small-angle [[neutron]] scattering ([[SANS]])

@@ Line 14: / Line 14: @@
 * Small sample size possible ([[x-ray focusing]])
 * [[In-situ]] experiments possible
 ===Disadvantages===

@@ Line 9: / Line 9: @@
 ===Advantages===
 * Accurate
 * Non-destructive ([[Radiation damage|to a point]])
 * Rapid (depending on x-ray source; [[synchrotron]] vs. [[labscale]])

@@ Line 20: / Line 20: @@
 ===Applications===
-* [[BioSAXS|Biological samples]]: proteins or other biomacromolecules in solution, protein aggregation, virus assembly/clustering, etc.
+* [[BioSAXS|Biological samples]]: proteins or other biomacromolecules in solution, [[Kratky plot|macromolecule conformation]], protein aggregation, virus assembly/clustering, etc.
 * Soft matter: polymers, colloids
-* Liquid crystals
+* [[Liquid crystal]]s
 * [[Block-copolymers]]
 * Nanoscale [[superlattices]]

@@ Line 1: / Line 1: @@
-[[Image:Standard-AgBH-gisaxs th000 spot3 60sec SAXS.png|thumb|200px|right|Example scattering pattern (for [[Material:Silver behenate|AgBH]]). The [[Scattering_features#Rings|rings]] of scattering at well-defined angles arise from scattering off of the lamellar order in the sample.]]
+[[Image:Standard-AgBH-gisaxs th000 spot3 60sec SAXS.png|thumb|200px|right|Example SAXS pattern (for [[Material:Silver behenate|AgBH]]). The [[Scattering_features#Rings|rings]] of scattering at well-defined angles arise from scattering off of the lamellar order in the sample.]]
 '''Small-angle x-ray scattering''' ('''SAXS''') is a method to analyze the nanoscale structure of a sample by measuring the intensity of [[x-ray]]s [[scattering|scattered]] as a function of angle.
 The classic, stereotypical, application of SAXS is to study the size and shape of particles dispersed in solution (including [[BioSAXS|biological macromolecules]]). In these cases, one typically reduces the 2D area [[detector]] image into a 1D curve (I vs. [[q]]), where the slope of the curve (and/or oscillations within it) encode information about the structure. SAXS can also be used to measure ordered nanoscale systems (e.g. nanoscale [[superlattice]]s), where one observes sharp peaks in the scattering data. A variety of new techniques have been developed specifically for measurement of ordered nanostructures ([[GISAXS]], [[CD-SAXS]], [[GTSAXS]], etc.).
 ==See Also==

← Older revision		Revision as of 12:44, 25 July 2015
Line 3:		Line 3:
	'''Small-angle x-ray scattering''' ('''SAXS''') is a method to analyze the nanoscale structure of a sample by measuring the intensity of [[x-ray]]s [[scattering\|scattered]] as a function of angle.		'''Small-angle x-ray scattering''' ('''SAXS''') is a method to analyze the nanoscale structure of a sample by measuring the intensity of [[x-ray]]s [[scattering\|scattered]] as a function of angle.

−	The classic, stereotypical, application of SAXS is to study the size and shape of particles dispersed in solution (including [[BioSAXS\|biological macromolecules]]). In these cases, one typically reduces the 2D area [[detector]] image into a 1D curve (I vs. [[q]]), where the slope of the curve (and/or oscillations within it) encode information about the structure. SAXS can also be used to measure ordered nanoscale systems (e.g. nanoscale [[superlattice]]s), where one observes sharp peaks in the scattering data.	+	The classic, stereotypical, application of SAXS is to study the size and shape of particles dispersed in solution (including [[BioSAXS\|biological macromolecules]]). In these cases, one typically reduces the 2D area [[detector]] image into a 1D curve (I vs. [[q]]), where the slope of the curve (and/or oscillations within it) encode information about the structure. SAXS can also be used to measure ordered nanoscale systems (e.g. nanoscale [[superlattice]]s), where one observes sharp peaks in the scattering data. A variety of new techniques have been developed specifically for measurement of ordered nanostructures ([[GISAXS]], [[CD-SAXS]], [[GTSAXS]], etc.).
		+
		+	==See Also==
		+	* SAXS variants
		+	** [[GISAXS\|Grazing-incidence SAXS]] ([[GISAXS]]), useful for measuring thin-films.
		+	*** [[GTSAXS\|Grazing-incidence Transmission SAXS]] ([[GTSAXS]]))
		+	** Rotational SAXS ([[CD-SAXS]]), for reconstructing [[reciprocal-space]]