Search results

Sort By:

Limit search:

Light Induced Modification of Graphene Oxide Layers on GaN Basis

100%

Łopion A., Stobiński L., Pakuła K., Bożek R., Kaźmierczak P., Wysmołek A., Stępniewski R.

Acta Physica Polonica A

2016

vol. 130

issue 5

1169-1171

Graphene oxide suspension in various solvents was spin coated on metal organic vapor phase epitaxy grown GaN/saphire layers. Samples were characterised using the Raman spectroscopy and atomic force microscopy, before and after high temperature treatment. We found that graphene oxide was modifed by high temperature treatment, however a considerable modification was also observed as a result of impinged laser light incident due to the measurements. The Raman spectra were decomposed into two contributions showing different behaviour during the Raman scattering measurements.

Phase Analysis of Magnetic Inclusions in Nanomaterials Based on Multiwall Carbon Nanotubes

84%

Brzózka K., Krajewski M., Małolepszy A., Stobiński L., Szumiata T., Górka B., Gawroński M., Wasik D.

Acta Physica Polonica A

2017

vol. 131

issue 4

863-865

Functionalized multiwall carbon nanotubes as well as nanocomposite based on that material covered by nanoparticles composed of iron oxides were the subject of investigations. In order to identify all iron-bearing phases including those reported on the base of previous X-ray diffraction measurements, the transmission Mössbauer spectroscopy was utilized. The experiments were carried out both at room temperature and also at low temperatures. It was stated that in the investigated nanotubes some impurities were present, originating from the catalyst remains, in form of Fe-C and α -Fe nanoparticles. The Mössbauer spectra collected for the nanocomposite showed a complex shape characteristic of temperature relaxations. The following subspectra related to iron-based phases were identified: sextet attributed to hematite, with hyperfine magnetic field reduced due to the temperature relaxations, sextet corresponding to iron carbide as well as two doublets linked to superparamagnetic hematite and ferrihydrites.

Refine search results

2 Acta Physica Polonica A

1 2017

1 2016

2 Stobiński L.

1 Bożek R.

1 Brzózka K.

1 Gawroński M.

1 Górka B.

1 Kaźmierczak P.

1 Krajewski M.

1 Małolepszy A.

1 Pakuła K.

1 Stępniewski R.

1 Szumiata T.

1 Wasik D.

1 Wysmołek A.

1 Łopion A.

Search results

Light Induced Modification of Graphene Oxide Layers on GaN Basis

Phase Analysis of Magnetic Inclusions in Nanomaterials Based on Multiwall Carbon Nanotubes