Booth, T. J.

Bøggild, Peter

Cagliani, Alberto

Hansen, Thomas Willum

Kling, Jens

Wagner, Jakob Birkedal

Graphene, as the forefather of 2D-materials, attracts much attention due to its extraordinary properties like transparency, flexibility and outstanding high conductivity, together with a thickness of only one atom. However, graphene also possesses no band gap, which makes it unsuitable for many electronic applications like transistors. It has been shown theoretically that by nanostructuring pristine graphene, e.g. with regular holes, the electronic properties can be tuned and a band gap introduced. The size, distance and edge termination of these “defects” influence the adaptability. Such nanostructuring can be done experimentally, but especially characterization at atomic level is a huge challenge. High-resolution TEM (HRTEM) is used to characterize the atomic structure of graphene. We optimized the imaging conditions used for the FEI Titan ETEM. To reduce the knock-on damage of the carbon atoms in the graphene structure, the microscope was operated at 80kV. As this strongly increases the influence of the chromatic aberration of the lenses, the energy spread of the electron gun was reduced to &lt;0.2eV by using a monochromator. Together with the objective-lens Cs-corrector a resolution better then 1.2Å can be achieved, which allows us to resolve the second order reflection of graphene and to visualize the atomic structure in HRTEM. With this tool we tackle the challenge of imaging the introduced “defects” and their atomic structure.<br/

Online Research Database In Technology

Alberto Cagliani - DTU Orbit (06/08/2016) Cagliani, Albertoalberto.cagliani@nanotech.dtu.dkDepartment of Micro- and Nanotechnology - Researcher   Publications:  Multi-electrode probe geometry optimization for characterization of magnetic tunnel junction stacksCagliani, A., Kjær, D., Østerberg, F. W., Hansen, O., Nielsen, P. F. & Petersen, D. H. 2016Publication: Research - peer-review › Conference abstract for conference – Annual report year: 2016  Defect/oxygen assisted direct write technique for nanopatterning grapheneCagliani, A., Lindvall, N., Larsen, M. B. B. S., Mackenzie, D. M. A., Jessen, B. S., Booth, T. J. & Bøggild, P. 2015 In :Nanoscale. 7, 14, p. 6271-6277 7 p.Publication: Research - peer-review › Journal article – Annual report year: 2015  High quality sub-10 nm graphene nanoribbons by on-chip PS-b-PDMS block copolymer lithographyRasappa, S., Caridad, J., Schulte, L., Cagliani, A., Borah, D., Morris, M. A., Bøggild, P. & Ndoni, S. 2015 In : R S CAdvances. 5, 82, p. 66711-66717 7 p.Publication: Research - peer-review › Journal article – Annual report year: 2015  Transfer of Direct and Moiré Patterns by Reactive Ion Etching Through Ex Situ Fabricated Nanoporous Polymer MasksShvets, V., Hentschel, T., Schulte, L., Tschammer, L. K., Cagliani, A., Bøggild, P., Almdal, K. & Ndoni, S. 2015 In :Langmuir. 31, 22, p. 6245-6252 8 p.Publication: Research - peer-review › Journal article – Annual report year: 2015  Epitaxial growth of quantum dots on InP for device applications operating at the 1.55 μm wavelength rangeSemenova, E., Kulkova, I., Kadkhodazadeh, S., Barettin, D., Kopylov, O., Cagliani, A., Almdal, K., Willatzen, M. & Yvind,K. 2014 In : Proceedings of SPIE, the International Society for Optical Engineering. 8996, 9 p., 899606Publication: Research - peer-review › Conference article – Annual report year: 2014  Graphene transport properties upon exposure to PMMA processing and heat treatmentsGammelgaard, L., Caridad, J., Cagliani, A., Mackenzie, D., Petersen, D. H., Booth, T. & Bøggild, P. 2014 In : 2D materials. 1, 3, p. 035005 11 p.Publication: Research - peer-review › Journal article – Annual report year: 2014  Large-area nanopatterned graphene for ultrasensitive gas sensingCagliani, A., Mackenzie, D. M. A., Tschammer, L. K., Pizzocchero, F., Almdal, K. & Bøggild, P. 2014 In : Nano Research. 7, 5, p. 743-754 12 p.Publication: Research - peer-review › Journal article – Annual report year: 2014  Pulse mode actuation-readout system based on MEMS resonator for liquid sensingTang, M., Cagliani, A., Davis, Z. J. & He, L. 2014 Proceedings of the 9th IEEE International Conference on Nano/MicroEngineered and Molecular Systems April 13-16, 2014, Hawaii, USA. IEEE, p. 216-219 4 p.Publication: Research - peer-review › Article in proceedings – Annual report year: 2014  Ultrasensitive thermometer for atmospheric pressure operation based on a micromechanical resonatorCagliani, A., Pini, V., Tamayo, J., Calleja, M. & Davis, Z. J. 2014 In : Sensors and Actuators B: Chemical. 202, p. 339-345Publication: Research - peer-review › Journal article – Annual report year: 2014  Imaging edges of nanostructured grapheneKling, J., Cagliani, A., Booth, T. J., Bøggild, P., Wagner, J. B. & Hansen, T. W. 2013Publication: Research - peer-review › Conference abstract for conference – Annual report year: 2013 High frequency bulk resonators for bio/chemical diagnostics and monitoring applicationsCagliani, A., Davis, Z. J. & Boisen, A. 2012 Kgs. Lyngby: Technical University of Denmark. 159 p.Publication: Research › Ph.D. thesis – Annual report year: 2012  Monitoring the hydration of DNA self-assembled monolayers using an extensional nanomechanical resonatorCagliani, A., Kosaka, P., Tamayo, J. & Davis, Z. J. 2012 In : Lab On a Chip. 12, 11, p. 2069-2073Publication: Research - peer-review › Journal article – Annual report year: 2012  Investigation of peptide based surface functionalization for copper ions detection using an ultrasensitive mechanicalmicroresonatorCagliani, A., Fischer, L. M., Rasmussen, J. L. & Davis, Z. J. 2011 In : Sensors and Actuators B: Chemical. 160, 1, p. 1250-1254Publication: Research - peer-review › Journal article – Annual report year: 2011  Pulse mode readout of MEMS bulk disk resonator based mass sensorTang, M., Cagliani, A. & Davis, Z. J. 2011 In : Sensors & Actuators: A. Physical. 168, 1, p. 39-45Publication: Research - peer-review › Journal article – Annual report year: 2011  Ultrasensitive bulk disk microresonator-based sensor for distributed mass sensingCagliani, A. & Davis, Z. J. 2011 In : Journal of Micromechanics and Microengineering. 21, 4, p. 045016Publication: Research - peer-review › Journal article – Annual report year: 2011  Manipulation and in situ transmission electron microscope characterization of sub-100 nm nanostructures using amicrofabricated nanogripperCagliani, A., Wierzbicki, R., Occhipini, L., Petersen, D. H., Dyvelkov, K. N., Sardan Sukas, Ö., Geilman Herstrøm, B.,Booth, T. & Bøggild, P. 2010 In : Journal of Micromechanics and Microengineering. 20, 3, p. 030509Publication: Research - peer-review › Journal article – Annual report year: 2010  Noise Depression of Parasitic Capacitance for Frequency Detection of Micromechanical Bulk Disk ResonatorTang, M., Cagliani, A., Escouflaire, M., Mouisel, S. & Davis, Z. J. 2010 In : 2010 5th IEEE International Conference onNano/Micro Engineered and Molecular Systems (NEMS 2010). p. 728 - 731Publication: Research › Conference article – Annual report year: 2010  Novel SU-8 based vacuum wafer-level packaging for MEMS devicesMurillo, G., Davis, Z. J., Keller, S. U., Abadal, G., Agusti, J., Cagliani, A., Noeth, N-N., Boisen, A. & Barniol, N. 2010 In :Microelectronic Engineering. 87, 5-8, p. 1173-1176Publication: Research - peer-review › Journal article – Annual report year: 2010  Bulk disk resonator based ultrasensitive mass sensorCagliani, A. & Davis, Z. J. 2009 Sensors, 2009 IEEE. IEEE, p. 1317-1320 Publication: Research - peer-review › Article in proceedings – Annual report year: 2009  Projects:  High frequency bulk resonators for bio/chemical diagnostics and monitoring applicationsCagliani, A., Boisen, A., Davis, Z. J., Hansen, O., Del Monte, A. U. & Roukes, M. L.01/10/2008 → 16/01/2012Project: PhD  Activities:  Introductory course on MRAMAlberto Cagliani (Participant), 1 Jul 2015 → 3 Jul 2015, Introductory course on MRAMActivity: Participation in conference/workshop/course/seminar › Participation in workshop, seminar, course 

Imaging edges of nanostructured graphene

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Imaging edges of nanostructured graphene

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