The document announces summer open houses at the Penn State Materials Characterization Lab to showcase various materials characterization techniques. It provides a schedule listing the technique demonstrated each day along with the time and building location. The open houses will cover techniques such as thermal analysis, electron microscopy, X-ray diffraction, focused ion beam, and small angle X-ray scattering. A map shows the locations of the main buildings where the lab's instruments are located. The lab offers services like user training, instrument operation by staff, and online booking of instruments.
Summary of operating principles of Surface Enhanced Raman Spectroscopy (SERS) instrumentation technique. Review of experimentation and results obtained using SERS in three scientific journals.
Perovskite: introduction, classification, structure of perovskite, method to synthesis, characterization by XRD and UV- vis spectroscopy , lambert beer's law, material properties and advantage and application.
This includes what is Quantum Dots and their properties ,types of synthesis methods of nano materials such as top down, bottom up etc.It includes few things about Carbon Quantum Dots.
Summary of operating principles of Surface Enhanced Raman Spectroscopy (SERS) instrumentation technique. Review of experimentation and results obtained using SERS in three scientific journals.
Perovskite: introduction, classification, structure of perovskite, method to synthesis, characterization by XRD and UV- vis spectroscopy , lambert beer's law, material properties and advantage and application.
This includes what is Quantum Dots and their properties ,types of synthesis methods of nano materials such as top down, bottom up etc.It includes few things about Carbon Quantum Dots.
Perovskite Solar Cells
a short general overview presentation
hadi maghsoudi
device structure
crystal structure
preparation synthesis method
review papers
This presentation contains a basic introduction to quantum dots,their discovery, properties, applications,advantages,limitations and future prospects.It also contains a brief overview of experimental work carried out and results obtained during my summer term project.
Introduction
Nanoparticle characterization techniques
Electron Microscope
Scanning electron microscope
Transmission electron Microscope
X-ray powder diffraction
Nuclear Magnetic Resonance
Perovskite Solar Cells
a short general overview presentation
hadi maghsoudi
device structure
crystal structure
preparation synthesis method
review papers
This presentation contains a basic introduction to quantum dots,their discovery, properties, applications,advantages,limitations and future prospects.It also contains a brief overview of experimental work carried out and results obtained during my summer term project.
Introduction
Nanoparticle characterization techniques
Electron Microscope
Scanning electron microscope
Transmission electron Microscope
X-ray powder diffraction
Nuclear Magnetic Resonance
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Enterprise Excellence is Inclusive Excellence.pdfKaiNexus
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1. Materials Characterization Lab
www.mri.psu.edu/mcl
SMALL ANGLE XRAY SCATTERING (SAXS)
AUGUST 10, 2005
Mark S. Angelone
msa3@psu.edu
2. Materials Characterization Lab
www.mri.psu.edu/mcl
Summer Characterization Open Houses
Technique Time Date Location
Thermal analysis (TGA, DTA, DSC) 9:45 AM June 8 250 MRL Bldg.
Transmission Electron Microscopy (TEM/STEM) 9:45 AM June 15 114 MRI Bldg
Scanning electron microscopy (SEM) 9:45 AM June 22 541 Deike Bldg.
Analytical SEM 11:00 AM June 22 541 Deike Bldg.
X-ray Diffraction (XRD) 9:45 AM June 29 250 MRL Bldg.
Dielectric Characterization (25 min lecture only) 9:45 AM July 6 250 MRL bldg.
High temperature sintering lab (20 min lecture only) 10:15 AM July 6 250 MRL Bldg.
Focused Ion Beam (FIB) 9:45 AM July 13 114 MRI Bldg
TEM sample preparation 11:00 AM July 13 114 MRI Bldg
Orientation imaging microscopy (OIM/EBSD) 9:45 AM July 20 250 MRL Bldg.
Chemical analysis (ICP, ICP-MS) 9:45 AM July 27 541 Deike Bldg.
Atomic Force Microscopy (AFM) 9:45 AM August 3 114 MRI Bldg
Small angle x-ray scattering (SAXS) 9:45 AM August 10 541 Deike Bldg.
Particle Characterization 9:45 AM August 17 250 MRL
X-ray photoelectron spectroscopy (XPS/ESCA) 9:45 AM August 24 114 MRI Bldg
Auger Electron Spectroscopy (AES) 11:00 AM August 24 114 MRI Bldg
NOTE LOCATIONS: The MRI Bldg is in the Innovation Park near the Penn Stater Hotel; MRL Bldg. is on Hastings Road.
More information: www.mri.psu.edu/mcl
3. Materials Characterization Lab
www.mri.psu.edu/mcl
Materials Characterization Lab Locations
MRI Bldg:
XPS/ESCA, FIB
SIMS, TEM, HR-
TEM, FE-Auger,
MRL Bldg:
Hosler Bldg:
AFM, XRD
SEM, XRD, OIM, DTA,
SEM,AFM,ESEM, FE-
DSC, TGA, FTIR, Penn Stater
SEM, EPMA, ICP,
Hotel
Raman, AFM, Powder,
E&ES Bldg: ICP-MS,BET, SAXS
dielectric, prep, shop,
SEM
IC, UV-Vis
Route 322
Steidle Bldg:
Atherton Street
Nanoindenter
(322 Business)
I-99
Park Ave.
0
0 0
0 0 0 0
Ave. 0
0 0 0 0
Park 0
Beaver
0
0
Stadium
0
0
0
Centre
0
0
Porter Road
Community
Univ
Shortlidg
Hospital
0
0
Burrowes Road
ersi
ty D
e
Pollock Road
Road
rive
North
Hastin
Deike Bldg: gs Ro
ad
College Ave.
4. Materials Characterization Lab
www.mri.psu.edu/mcl
MCL SERVICES
• Facilities/Instruments
• User Training
• Operators/Analyst for hire
• 24/7
• Online bookings
• User fees
• website/contacts to get started
11. Materials Characterization Lab
www.mri.psu.edu/mcl
Examples from literature
Polymer dendrimers
dilute solns in CH3OH to get dendrite sizes
dilute so dendrimers don’t correlate
Alkanediols
solns in water to study clustering
heavy water improves contrast (sans)
Water-based polymer latexes
use anionic surfactant to suspend in water
Macromolecular foams
wafers cut & immersed in toluene to get swelling
banded matls are translated in situ
Microemulsions
oils in water to get droplet size
12. Materials Characterization Lab
www.mri.psu.edu/mcl
Examples from literature
CVD SiGe films
µ-thin films stacked to get Ge heterogeneity
Nanotubes
use surfactant in water & sonicate; place in quartz cells
to study nanotube aggregation
Powders
thin-walled capillaries
Polymers
study crystallization processes in situ in hot cell
13. Materials Characterization Lab
www.mri.psu.edu/mcl
Examples from literature
Thin films on glass substrates
as is, but requires grazing incidence
Random crystalline block copolymers
rheology study in situ in rotating parallel disk cell
to get crystal alignment and grain rotations
Splat-cooled glass
in situ annealing study to follow pptn of PbTe
nano-crystals
14. Materials Characterization Lab
www.mri.psu.edu/mcl
Examples from literature
Blown polymer films
special cell for in situ studies
Liq. Crystals
special magnetic cell for molecule rotation
Ionomers
cell w/ kapton windows
Hi pressure studies
diamond windows
16. Materials Characterization Lab
www.mri.psu.edu/mcl
Reciprocal Space Reciprocal Space
Real Space Real Space
I(q)
⏐A⏐
Γ (r)
⏐A⏐2
ρ (r) I.F.T.
F.T. 1/r (q)
q r
r
1/r (q)
Not Possible By Direct Calc
Calc – Scattering Theory – F.T.
Calc – Auto Correlation Function of ρ (r)
Large r
Correlation function, radial
Large r Amplitude/Phase
distribution
Observed scattering
Particulate shapes Spectra of scattering
intensity-
Phase mix from individual scatters
Small r
Noise/truncation
Large period structures (continuous/discrete)
Pair (Radial) distribution: Short
effects
range atomic ordering
Small r
(amorphous materials)
Atomic positions
•Crystals
Large r (SAXS) Diffuse scatter Patterson function: Interatomic
•amorphous
Small r (WAXS) Diffraction dominates vectors (crystals)
for xtals, diffuse scatter for liquids,
amorphous solids
17. Materials Characterization Lab
www.mri.psu.edu/mcl
Analytical Interpretation
Model ρ(r) → calculate I(q) → fit to observed I(q)
Or
Model ρ(r) → calculate Γ(r) → fit to F.T. of observed I(q)
(models cast in parameters of size, shape, dispersity, thermo mixing
energy, etc.)
18. Materials Characterization Lab
www.mri.psu.edu/mcl
Common SAXS Models
DILTUE PARTICULATE SYSTEM
•Mono or poly dispersed
•No interparticle scattering effects
SAXS Interpretation yields
•Size/dispersity for known shapes
•Rg for unknown shapes
•Can incorporate dense packing effects into model
22. Materials Characterization Lab
www.mri.psu.edu/mcl
Common SAXS Models
Non Particulate 2 Phase System
•2 intermixed phases without host or matrix
SAXS Interpretation yields
•Phase volume fraction, domain size,
•information on interphase boundary
(sharp or diffuse)
23. Materials Characterization Lab
www.mri.psu.edu/mcl
Common SAXS Models
Periodic Systems
•Lamellar stacks, ordered copolymers, biologic
Periodic and ordered structures
WAXS methods apply but with emphasis on
deviations from ordered structures
26. Materials Characterization Lab
www.mri.psu.edu/mcl
Common SAXS Models
Soluble Blend System
•Single disordered phase dissolved molecularly with
density inhomogeneity
(miscible polymers, block copolymers, polymer solns)
SAXS Interpretation yields
•Solution properties
(could be treated as dilute system but blend model formulated
for more direct treatment of thermodynamic properties
rather than size and shape)
27. Materials Characterization Lab
www.mri.psu.edu/mcl
TWO IMPORTANT GENERAL MODEL RESULTS
(some interpretation without models)
•GUINIER LAW
•POROD LAW
28. Materials Characterization Lab
www.mri.psu.edu/mcl
GUINIER LAW
•Even for unknown, irregular or ‘non-describable shapes; scattering has
predictable form at low q
29. Materials Characterization Lab
www.mri.psu.edu/mcl
GUINIER LAW
Valid for
•q << 1/Rg
•Dilute system
•Isotropic (random particle orientation)
•Solvent scattering subtracted
30. Materials Characterization Lab
www.mri.psu.edu/mcl
POROD LAW
•Predictable relationship between I(q) and total interface area
in 2 phase systems at high q
•Can obtain total interface area for absolute intensities or specific
surface area (S/V) for relative measure of
scattered intensity
•Deviations from Porod Law indicate and give information on
diffuse interphase boundaries
•
31. Materials Characterization Lab
www.mri.psu.edu/mcl
INSTRUMENTS FOR SAXS
•KRATKY CAMERA
•PINHOLE CAMERA
•LABORATORY SOURCES
•SYNCHROTRON SOURCES
44. Materials Characterization Lab
www.mri.psu.edu/mcl
Supercritical Fluid Treatment of Polymers
Poly(aryl ether ether ketone) PEEK
high performance thermoplastic with high
impact strength, tensile yield strength and
thermal and chemical resistance
Group studied methyl substituted PEEK annealed in air
and supercritical CO2 to control crystallization
and reduce processing costs.
unpublished Queen’s University, Ontario
47. Materials Characterization Lab
www.mri.psu.edu/mcl
Pt particle size in carbon-supported Pt electrocatalysts
for fuel cell applications
Random pore model;
three supports
Stevens, et al, CARBON 41 (2003)
48. Materials Characterization Lab
www.mri.psu.edu/mcl
Pt particle size in carbon-supported Pt electrocatalysts
for fuel cell applications
SAXS: Pt loadings by mass/ 2 supports
Stevens, et al, CARBON 41 (2003)
49. Materials Characterization Lab
www.mri.psu.edu/mcl
Pt particle size in carbon-supported Pt electrocatalysts
for fuel cell applications
Pt Size Distribution: Pt loadings by mass/ 2 supports
Stevens, et al, CARBON 41 (2003)
50. Materials Characterization Lab
www.mri.psu.edu/mcl
Pt particle size in carbon-supported Pt electrocatalysts
for fuel cell applications
•This study used moderately small angle so that size
agreed with WAXS/Scherrer but SAXS best at smaller size
•Generally, WAXS/Scherrer not effective in large sizes (no line
broadening, xtal domain vs. grain domain, no distribution info)
•TEM/SEM: specific areas vs. average important to catalyst
properties
Stevens, et al, CARBON 41 (2003)
