ThermofisherApreo 2SFESEM is a powerful analytical tool for the ultimate surface characterization of nanomaterials. The state-of-the-artFESEM features excellent ultra-high-resolution (UHR) imaging performance, especially for low electron beam energies. In addition, ThermofisherApreo 2SFESEM operates with a high-stability Schottky field emission gun to provide stable high-resolution analytical currentsup to 410 nA, to provide optimum conditions for microanalysis applications that require long acquisition times. Also, there is continuous beam current control and optimized aperture angle and beam deceleration with stage bias from −4,000 V to +600 V.

The integrated cathodoluminescence system with FESEM allows researchers to study the optical and electronic properties of various types of materials. TheGatanMonarccathodoluminescencesystem (CL) Model 450 (spectrum wavelength ranges between 190-1100 nm)has a minimum step size of 0.1 nm, and gratings of 300, 600, and 1200 lines/mm.

Applications

1. Studying the surface structure and texture of materials with nanoscale precision.

2. Analyzing thin films and coatings for uniformity and thickness.

3. Visualizing nanoparticles, nanowires, nanotubes, and other nanostructures.

4. Determining the size and shape distribution of nanomaterials.

CL Applications

1. Study the optical properties of solid thin film and bulk samples

2. Identifying defects/impurities in semiconductor materials

3. Study the defect luminescence

4. CL hyperspectral imaging

5. Semiconductors, nanotechnology, and geosciences.

Sample preparation

3. Sample (Powder, solid, ceramic, biological, metal, etc.) should be 100% moisture-free.

2. Sample dimension should not exceed (LxBxH) of (6mm x 6mm x 6mm) with rotation & tilting and (LxBxH) of (6mm x 6mmx10mm) without rotation & tilting.

3. Non-conductive samples require a conductive coating of approx. 2mm-5mm. For electron microscopy conductive coating can be of noble metal (Cr, Au) because it is stable and has a high electron yield. Here we have only Au coater with this lab.

4. The sample must be stably fixed to the specimen mount using carbon tape as an adhesive.