Cadmium sulfide <mml:math display="inline"><mml:mrow><mml:mo>(</mml:mo><mml:mi>CdS</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>(CdS) thin films were deposited in an oscillating chemical bath using a Teflon vane connected to an electrical dental brush oscillating at <mml:math display="inline"><mml:mrow><mml:mn>37</mml:mn><mml:mspace width="0.3em"></mml:mspace><mml:mi>Hz</mml:mi></mml:mrow></mml:math>37Hz . The range of the bath temperature was from 65 to <mml:math display="inline"><mml:mrow><mml:mn>85</mml:mn><mml:mo>°</mml:mo><mml:mi mathvariant="normal">C</mml:mi></mml:mrow></mml:math>85°C in intervals of <mml:math display="inline"><mml:mrow><mml:mn>5</mml:mn><mml:mo>°</mml:mo><mml:mi mathvariant="normal">C</mml:mi></mml:mrow></mml:math>5°C and different deposition times. By this agitation technique we obtained <mml:math display="inline"><mml:mrow><mml:mi>CdS</mml:mi></mml:mrow></mml:math>CdS films with a highly oriented hexagonal structure (α-greenockite) in the (002) direction as measured by X-ray diffraction patterns. Images of atomic force microscopy and stoichiometry values obtained by energy-dispersive analysis by X-ray confirm the good quality of deposited films. High stoichiometry on the <mml:math display="inline"><mml:mrow><mml:mi>CdS</mml:mi></mml:mrow></mml:math>CdS films was measured by elemental analysis with variations less than 3.5% in all samples. The mean value of the gap energy was about <mml:math display="inline"><mml:mrow><mml:mn>2.38</mml:mn><mml:mspace width="0.3em"></mml:mspace><mml:mi>eV</mml:mi></mml:mrow></mml:math>2.38eV , a close value for these films.

In this work, we study the synthesis of monodispersed Fe nanoparticles (Fe‐NPs) in situ functionalized with oleic acid. The nanoparticles were self‐assembled by inert gas condensation (IGC) technique by using magnetron‐sputtering process. Structural characterization of Fe‐NPs was performed by transmission electron microscopy (TEM). Particle size control was carried out through the following parameters: (i) condensation zone length, (ii) magnetron power, and (iii) gas flow (Ar and He). Typically the nanoparticles generated by IGC showed diameters which ranged from ~0.7 to 20 nm. Mass spectroscopy of Fe‐NPs in the deposition system allowed the study of in situ nanoparticle formation, through a quadrupole mass filter (QMF) that one can use together with a mass filter. When the deposition system works without quadrupole mass filter, the particle diameter distribution is around +/−20%. When the quadrupole is in line, then the distribution can be reduced to around +/−2%.

Graphite-coated iron nanoparticles were prepared from magnetite nanoparticles by chemical vapour deposition (CVD) under methane and hydrogen atmosphere. After being purified from carbon excess, graphite-coated iron nanoparticles were tested for morphological and magnetic properties. It was found that, during the thermal process, magnetite nanoparticles 6 nm in size coalesce and transform into graphite-coated iron 200 nm in size, as revealed by scanning electron microscopy (SEM). Raman characterization assessed that high-quality graphite coats the iron core. Magnetic measurements revealed the phase change (magnetite to iron) as an increase in the saturation magnetization from 50 to 165 emu/g after the CVD process.