• Direct Measurement of the Magnitude of the van der Waals Interaction of Single and Multilayer Graphene 

      Chiou, Yu-Cheng; Olukan, Tuza Adeyemi; Almahri, Mariam Ali; Apostoleris, Harry; Chiu, Cheng Hsiang; Lai, Chia-Yun; Lu, Jin-You; Santos, Sergio; Almansouri, Ibraheem; Chiesa, Matteo (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-23)
      Vertical stacking of monolayers via van der Waals (vdW) assembly is an emerging field that opens promising routes toward engineering physical properties of two-dimensional materials. Industrial exploitation of these engineering heterostructures as robust functional materials still requires bounding their measured properties so as to enhance theoretical tractability and assist in experimental designs. ...
    • Getting adhesion force maps with an amplitude-modulation AFM in tapping mode 

      Chiesa, Matteo; Santos, Sergio; Lai, Chia-Yun; Olukan, Tuza Adeyemi (Research report; Forskningsrapport, 2020-07)
      Here we demonstrate how to get adhesion force maps with an amplitude-modulation AFM in tapping mode. Our method is tapping mode but it is carried out at ultra-small amplitudes in the presence of surface water layers. The tip is made to vibrated under the water layer in what we call Small Amplitude Small Set-point AM AFM. We show how this is done with an example based on the Cypher scanning probe ...
    • Getting Hamaker coefficients with an amplitude-modulation AFM in tapping mode 

      Lai, Chia-Yun; Olukan, Tuza Adeyemi; Santos, Sergio; Chiesa, Matteo (Research report; Forskningsrapport, 2020-07)
      We demonstrate how to get Hamaker coefficients with an amplitude-modulation AFM operated in standard tapping mode. The Hamaker coefficient is a physical parameter that provides chemical information about the surface of samples. It is based or emerges from van der Waals forces. We use a Cypher scanning probe microscope from Asylum Research to demonstrate the method. The method is based on the research ...
    • Machine learning assisted quantification of graphitic surfaces exposure to defined environments 

      Lai, Chia-Yun; Santos, Sergio; Chiesa, Matteo (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-17)
      We show that it is possible to submit the data obtained from physical phenomena as complex as the tip-surface interaction in atomic force microscopy to a specific question of interest and obtain the answer irrespective of the complexity or unknown factors underlying the phenomena. We showcase the power of the method by asking “how many hours has this graphite surface been exposed to ambient conditions?” ...
    • Oscillations:Linear theory and applications in AFM 

      Olukan, Tuza Adeyemi; Santos, Sergio; Elsherbiny, Lamia; Chiesa, Matteo (Research report; Forskningsrapport, 2022)
      The theory of oscillations can be studied from a mathematical point of view in terms of differential equations. The differential equation is written and then the solution or solutions worked out and mathematically analysed. Provided physical, economic, social, or other phenomena can be modelled in terms of equivalent differential equations, the solutions and results are applicable to all phenomena ...
    • Oscillations:Nonlinear theory and applications in AFM 

      Santos, Sergio; Olukan, Tuza Adeyemi; Elsherbiny, Lamia; Verdaguer, Albert; Chiesa, Matteo (Research report; Forskningsrapport, 2022)
    • Reconstructing force profiles with an amplitude-modulation AFM in tapping mode 

      Olukan, Tuza Adeyemi; Lai, Chia-Yun; Santos, Sergio; Amadei, Carlo Alberto; Chiesa, Matteo (Research report; Forskningsrapport, 2020-07)
      Here we demonstrate how to reconstruct force profiles with an amplitude-modulation AFM operated in in standard tapping mode. Our example is based on the Cypher scanning probe microscope from Asylum Research. The method is based on Sader and Katan’s algorithm, but we have implemented an experimental set-up that allows for robust reconstruction. We discuss the details here.
    • Rethinking the role of solar energy under location specific constraints 

      Eikeland, Odin Foldvik; Apostoleris, Harry; Santos, Sergio; Ingebrigtsen, Karoline; Boström, Tobias; Chiesa, Matteo (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-22)
      In this manuscript we evaluate the potential of photovoltaic systems to meet some dedicated energy demand in specific geographic locations. Our approach is based on location-specific constraints rather than on pre-established, location-independent methodologies or assumptions. First, we propose that a thorough analysis of the socio-economic and technical possibilities of a location must act as the ...
    • Setting-up an amplitude-modulation (AM) AFM for tapping mode 

      Santos, Sergio; Lai, Chia-Yun; Olukan, Tuza Adeyemi; Amadei, Carlo Alberto; Chiesa, Matteo (Research report; Forskningsrapport, 2020)
      In this chapter, we are demonstrate how to set-up an amplitude-modulation (AM) AFM for tapping mode operation. We use a Cypher scanning probe microscope from Asylum Research. We employ our techniques for tip characterization and discuss the attractive and repulsive regimes.
    • Uncovering Contributing Factors to Interruptions in the Power Grid: An Arctic Case 

      Chiesa, Matteo; Bianchi, Filippo Maria; Eikeland, Odin Foldvik; Holmstrand, Inga Setså; Bakkejord, Sigurd; Santos, Sergio (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-03)
      Electric failures are a problem for customers and grid operators. Identifying causes and localizing the source of failures in the grid is critical. Here, we focus on a specific power grid in the Arctic region of Northern Norway. First, we collected data pertaining to the grid topology, the topography of the area, the historical meteorological data, and the historical energy consumption/production data. ...