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SMCF Facility
Surface & Materials Characterization

About the Facility

The Surface and Materials Characterization Facility (SMCF) provides state-of-the-art instruments for nanometer-scale surface measurement, thermal analysis, and mechanical characterization of a vari­ety of materials.

The SMCF facility is currently defined in three ar­eas (bays) as scanning probe microscopy, thermal and optical analysis, and mechanical characterization and sample preparation. The scanning probe microscopy (SPM) bay contains three SPM microscopies, including BRUKER ICON SPM, EnviroScope Atomic Force Microscope, and Dimension 3100 SPM system. The SPM offers simultaneous high-magnification observation of 3-dimentional images and related physical properties, as well as measurements in various environments. Two thermal analysis systems: a differential scanning calorimeter (DSC 204 F1 Phoenix) and a thermogravimetry analysis system (TGA 209 F1 Libra) allow users to study and measure various thermal properties of materials such as glass-transition, melting, and crystallization temperatures. Also available is an Olympus BX51 polarizing optical microscope which includes differential interference contrast capabilities for sample viewing and image analysis.  In addition, the thermal behavior of a sample can be observed under the microscope using a Mettler Toledo FP900 thermal system equipped with a FP 82 hot stage with a temperature range from room temperature to 375° C. The mechanical characterization and sample preparation bay houses the following: (1) Tukon 2500 Knoop/Vickers Hardness tester, (2) BUEHLER ISOMet 1000 Precision Saw, (3) BUEHLER MiniMet 1000 Grinder-polisher, (4) Sartorius Cubis MSU2.7S-000-DM Microbalance, and (5) A new annealing system with high magnetic field of 4.5 T will be available very soon.

The SMCF Specialist, Dr. Lanping Yue is in charge of the SMCF central facility to maintain equipment, as well as to teach and assist users in the use of these instruments, analysis techniques and data interpretation and presentation. Research collaborations are welcome from all university research groups, as well as companies in Nebraska and elsewhere.


Acknowledgement Text

Agencies including NSF and the University providing partial support of our Nebraska Nanoscale Facilities and NCMN Facilities require that the following words be included at the end of any Acknowledgement section of a paper in which experimental work was done in NNF-NCMN facilities:

The research was performed in part in the Nebraska Nanoscale Facility: National Nanotechnology Coordinated Infrastructure and the Nebraska Center for Materials and Nanoscience, which are supported by the National Science Foundation under Award ECCS: 1542182, and the Nebraska Research Initiative.

Equipment

1. Bruker Dimension ICON SPM
Bruker Dimension

The Bruker Dimension Icon® Atomic Force Microscope is equipped with a ScanAsyst® automatic image optimization mode based on PeakForce Tapping technology, which enables users to obtain consistent high-quality results easier and faster. This system is capable of many SPM applications as following:

  • Contact mode, tapping mode, peakforce tapping mode AFM, and AFM in fluid for surface topography imaging;
  • Magnetic Force Microscopy (MFM) - magnetic force gradient detection;
  • Electrostatic Force Microscopy (EFM) - measures variation in the electric field gradient above a sample;
  • Kelvin Probe Force Microscopy (KPFM) - measures material work function as well as surface charge;
  • Scanning Tunneling Microscopy (STM) - primary highest resolution AFM mode;
  • Tunneling Current AFM (TUNA) - measures material’s electrical conductivity with a wide range of currents from fA-mA;
  • Piezoresponse Force Microscopy (PFM) - studies piezo materials at the nanoscale;
  • Quantitative Nanomechanical Property Mapping (PF-QNM) - enabling researchers to map and distinguish quantitatively between nanomechanical properties while simultaneously imaging sample topography at high resolution. This technology operates over an extremely wide range (1MPa to 50GPa for modulus and 10pN to 10μN for adhesion) to characterize a large variety of sample types.
  • Heating and Cooling -Execute temperature control and thermal analysis on samples from –25°C to 200°C while scanning in various AFM modes.
EnviroScope
2. EnviroScope Atomic Force Microscope (ESCOPE)

The Digital Instruments EnviroScope combines AFM imaging with environmental controls and hermetically sealed sample chamber to perform Contact Mode and TappingMode atomic force microscopy in air, vacuum, or a purged gas, as well as a heated environment. With advanced environmental capabilities, users can observe sample reactions to a variety of complex environmental conditions while scanning.

3. Dimension 3100 SPM system
Dimension 3100 SPM system

The Digital Instruments Nanoscope IIIa Dimension 3100 SPM system provides high resolution, 3D images for a large variety of materials, such as nanoparticles, polymers, DNA, semiconductor thin films, magnetic media, optics and other advanced nanostructures. 

AFM can provide three-dimensional high contrast topographic images with sub-nanometer resolution including line width, grain size, thin film thickness, roughness measurements, sectioning of surfaces, particle analysis, surface defects, and pattern recognition, etc.

MFM image mode can scan samples in external magnetic fields, which is useful for in-situ imaging magnetic domain structures and magnetic switch behavior. The available magnetic devices can supply magnetic fields perpendicular (± 0.25 T) and/or parallel (± 0.35 T) to the sample surface.

4. DSC and TGA thermal analysis systems

The SMCF facility has two thermal analysis systems: a differential scanning calorimeter (DSC 204 F1 Phoenix) and a thermogravimetry analysis system (TGA 209 F1 Libra).  Both systems operate through a large temperature range from -170°C to 600°C for the DSC, and 25°C to 1100°C for the TGA.  These systems allow users to study and measure various thermal properties of materials such as; glass-transition temperatures, melting temperatures, melting enthalpy, crystallization temperatures, crystallization enthalpy, transition enthalpies, phase transformations, phase diagrams and other thermal properties.

DSC 204 F1 Phoenix
Differential scanning calorimeter (DSC 204 F1 Phoenix)
TGA 209 F1 Libra
Thermogravimetry analysis system (TGA 209 F1 Libra)
Olympus BX51 polarizing microscope
Olympus BX51 polarizing microscope
5. Olympus BX51 Polarizing Microscope

The SMCF houses an Olympus BX51 polarizing microscope which includes differential interference contrast capabilities for sample viewing, and image analysis.  In addition the thermal behavior of a sample can be observed under the microscope using a Mettler Toledo FP900 thermal system equipped with a FP 82 hot stage with a temperature range from room temperature to 375° C.

Tukon 2500 Knoop and Vickers tester
6. Tukon 2500 Knoop and Vickers tester

Vickers/Knoop Hardness Tester measures mechanical hardness of materials. The Vickers/ Knoop microhardness test is used particularly for small parts, very brittle materials or thin sheets, where only a small indentation may be made for testing purposes. The test force range: 10 g to 1000g.

7. Other equipment
  • Buehler ISOMet 1000 Precision Saw
  • The IsoMet 1000 Precision Saw offers increased speed, load, and a 7-inch diamond blade capacity that enables a wide variety of advance materials to be cut quickly and with low deformation.
  • Buehler MiniMet 1000 Grinder-polisher
  • The MiniMet 1000 Grinder-polisher is a sample preparation system with adjustable speed and high pressure capability that quickly prepares materials (such as ceramics, composites, and metals) for cross-sectional analysis.
  • Sartorius Cubis MSU2.7S-000-DM Microbalance
  • Microbalance with readability of 0.0001 mg is a high-resolution measuring instrument used for measuring sample up to a 2.1 g weighing capacity.
  • High Magnetic Field (4.5 T) Annealing System (coming soon)
  • The annealing system combines high temperature annealing with 4.5 T magnetic field to potentially modify the magnetic properties of thin films and alloys to form new magnetic phases and/or control the crystal growth.

Facility Contacts

Lanping Yue
Lanping Yue
Lanping Yue
Facility Specialist (primary)

013A Jorgensen Hall
Phone: 402-472-2742
lyue2@unl.edu
Andrei Sokolov
Andrei Sokolov
Andrei Sokolov
Facility Specialist (secondary)

007 Jorgensen Hall
Phone: 402-472-3839
sokolov@unl.edu
Jim Li
Xingzhong "Jim" Li
Xingzhong "Jim" Li
Facility Specialist (tertiary)

033 Jorgensen Hall
Phone: 402-472-8762
xzli@unl.edu
Li Tan
Li Tan
Li Tan
Faculty Advisor

W334 Nebraska Hall
Phone: 402-472-4018
ltan4@unl.edu