From Seeds to Islands: Growth of Oxidized Graphene by Two-Photon Oxidation
Koivistoinen, J., Sládková, L., Aumanen, J., Koskinen, P., Roberts, K., Johansson, A., Myllyperkiö, P., & Pettersson, M. (2016). From Seeds to Islands: Growth of Oxidized Graphene by Two-Photon Oxidation. Journal of Physical Chemistry C, 120(39), 22330-22341. https://doi.org/10.1021/acs.jpcc.6b06099
Published inJournal of Physical Chemistry C
© 2016 American Chemical Society. This is a final draft version of an article whose final and definitive form has been published by American Chemical Society. Published in this repository with the kind permission of the publisher.
The mechanism of two-photon induced oxidation of single-layer graphene on Si/SiO2 substrates is studied by atomic force microscopy (AFM) and Raman microspectroscopy and imaging. AFM imaging of areas oxidized by using a tightly focused femtosecond laser beam shows that oxidation is not homogeneous but oxidized and nonoxidized graphene segregate into separate domains over the whole irradiated area. The oxidation process starts from point-like “seeds” which grow into islands finally coalescing together. The size of islands before coalescence is 30–40 nm, and the density of the islands is on the order of 1011 cm–2. Raman spectroscopy reveals growth of the D/G band ratio along the oxidation. Sharpness of the D-band which persists over a large range of oxidation and the maximal value of the intensity ratio of the D- and G-bands (∼0.8) indicates that graphene oxidation proceeds by an increase of the oxidized area rather than progression of oxidized areas to fully disordered structure. A phenomenological model is developed which explains the observations. According to the model, the probability for oxidation of a site next to an already oxidized site is 5 orders of magnitude higher than oxidation of pristine graphene. Irradiation of an extended area by raster scanning leads to a formation of an irregular nanomesh of oxide islands with a narrow size distribution. The phenomenological model yields similar results as the experiment. This study forms a basis for controlled use of two-photon oxidation for tailoring properties of graphene and patterning it with submicrometer resolution. ...
PublisherAmerican Chemical Society
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
Preparation of graphene nanocomposites from aqueous silver nitrate using graphene oxide’s peroxidase-like and carbocatalytic properties Garg, Kunal; Papponen, Petri; Johansson, Andreas; Puttaraksa, Nitipon; Gilbert, Leona (Nature Publishing Group, 2020)The present study evaluates the role of graphene oxide’s (GO’s) peroxidase-like and inherent/carbocatalytic properties in oxidising silver nitrate (AgNO3) to create graphene nanocomposites with silver nanoparticles (GO/Ag ...
Revealing lattice disorder, oxygen incorporation and pore formation in laser induced two-photon oxidized graphene Mendoza, Martin E.; Ferreira, Erlon H.M.; Kuznetsov, Alexei; Achete, Carlos A.; Aumanen, Jukka; Myllyperkiö, Pasi; Johansson, Andreas; Pettersson, Mika; Archanjo, Braulio S. (Pergamon Press, 2019)Laser induced two-photon oxidation has proven to be a reliable method to pattern and control the level of oxidation of single layer graphene, which in turn allows the development of graphene-based electronic and optoelectronic ...
Johansson, Andreas; Tsai, Hung-Chieh; Aumanen, Jukka; Koivistoinen, Juha; Myllyperkiö, Pasi; Hung, Yi-Zhe; Chuang, Min-Chiang; Chen, Chia-Hao; Woon, Wei Yen; Pettersson, Mika (Pergamon, 2017)Chemical composition of two-photon oxidized single-layer graphene is studied by micrometer X-ray photoelectron spectroscopy (XPS). Oxidized areas with a size of 2 × 2 μm2 are patterned on graphene by tightly focused ...
Kaaripuro, Henri (2020)Tämän Pro gradu -tutkielman tavoitteena oli tutkia grafeenin käyttöä biologisessa havainnoinnissa. Tutkielman teoreettinen osio aloitettiin lyhyella katsauksella grafeenin fysikaalisista ominaisuuksista. Osiossa esiteltiiny ...
Measuring optical anisotropy in poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) films with added graphene Isoniemi, Tommi; Tuukkanen, Sampo; Cameron, David C.; Simonen, Janne; Toppari, Jussi (Elsevier BV * North-Holland, 2015)Graphene is a 2D nanomaterial having a great potential for applications in electronics and optoelectronics. Composites of graphene with conducting polymers have shown high performance in practical devices and their ...