Nanomaterials Laboratory

The AAS instrument serves for determination of chemical elements using absorption of light by free atoms. The wavelengths of the absorbed light are specific to the particular elements. The instrument is suitable only for analysis of liquid samples.

Parameters:

• Equipped with auto sampler
• Measurable elements: hollow cathode lamps for Ag; Au; Fe; Ni; Zn; Hg
• 8 lamps can be mounted simultaneously
• wavelength range: 190-900 nm
• bandwidth: 0,2-2 nm
• graphite oven

Up to 3000°C temperature; gas face velocity: 0 – 1,5 L/min ; Ar gas 3,5 L/min;

Water cooling between 10 – 30°C, with 0,6 – 1,5 L/min flow velocity)

Up to 3000°C temperature; gas face velocity: 0 – 1,5 L/min ; Ar gas 3,5 L/min;
Water cooling between 10 – 30°C, with 0,6 – 1,5 L/min flow velocity)

It provides a simultaneous, multi-element quantitive analysis of element composition of solutions or solubilized solid samples, even below ppm detection limit.

• axial plasma monitoring
• measured wavelength range: 167 – 785 nm
• direct analysis options for samples, which were revealed with hydrogen-fluoride

Applicable to the identification of powder samples, bulk crystals, and thin film materials. Furthermore, it is suitable for determination of phase composition of crystal mixtures based on the identification of crystal structure.

Parameters:

• Scanning range: -3° –  +145° (2Θ)
• Scanning speed: 0,01°-100°/min (2Θ)

Dynamic Light Scattering is used to measure grain-size distribution in a very small grain size range (1 nm–5 μm). It analyzes the temporal fluctuation of the intensity of scattered light, the smaller the grain, the faster is its movement. The analyzer applies the „Non-intensive Back Scattered” technique while measuring the grain-size distribution from the scattered light.

The other function of the analyzer is the so-called „Zeta-potential measurement”, that can be measured by laser Doppler electrophoresis. If the zeta potential is zero, the stability of the systems is reduced, particles can easily stick together, coagulates and aggregates may develop. If the zeta potential is positive or negative, the colloid system is stable, the particles mutually repel each other, the possibility of clumping decreases.

The instrument is applicable for the investigation of rheological properties of Newtonian (ideal) fluids, emulsions, suspensions, viscoelastic materials and melts. There are rotational or oscillating test modes.
In case of rotation mode, the measurement can be performed by controlling the shear rate or the shear stress (CSR or CSS mode) typically for the ideal or nearly ideal fluids.
Oscillation mode is specified in the measurement of rheological properties of viscoelastic materials. Amplitude or frequency sweep allows measuring the torque, phase lag, and complex shear modulus, from which the storage modulus and loss modulus (characterizing the elastic or viscous type of materials) can be found.
The test can be easily performed due to the automatic tool and configuration detecting system („Tool Master”). Peltier elements ensure fast and accurate temperature control. Raw data is collected and analyzed by Physica RheoPlus software.
It is possible to Analyze liquids and melts with the melting point up to 1100 °C.

Parameters:

• torque: 0,1 μNm
• torque: 230 mNm
• Torque resolution: 0,001 μNm
• Angular resolution: 0,012 μrad
• speed (CSS): 10-7 1/min
• speed (CSR): 10-6 1/min
• speed: 3000 1/min
• Frequency range: 10-5 – 100 Hz
• Temperature range: -150 –  +1100 °C
• Normal force range: 0,01-50 N

Parameters:

• Compact size (513 × 478 × 564 mm)
• Magnification range: 20× – 10.000×
• Acceleration voltage: 15 kV
• Maximum sample diameter: 70 mm
• Maximum sample hight: 20 mm
• BSE detector (Backscattered electron detector)

The instrument serves the purpose of qualitative and quantitative analysis of solid and liquid samples.

Parameters:

• Range of detectable elements: 11Na-92U
• Collimator size: 1-10 mm
• Sample chamber sizes:
  diameter: 300 mm
  height: 150 mm
• Sample chamber atmosphere: air/vacuum
• Equipped with CCD camera

Fingerprint-like phase identification, quantification, and mapping of several physical and chemical properties (e. g. chemical substitution, stress, defect density).

Parameters:

• 3 laser sources
• maximal areal resolution: 600 – 800 nm
• Raman microprobe combined with AFM

Dr. György KAPTAY – Head of the Department, Department of Material Development

Address: H-3519 Miskolc, Iglói út 2.
Mobile: +36-30/415-0002
E-mail: george.kaptay@bayzoltan.hu