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1. 2D or Not 2D? Testing the Utility of 2D Vs. 3D Landmark Data in Geometric Morphometrics of the Sculpin Subfamily Oligocottinae (Pisces; Cottoidea): 2D VS. 3D GEOMETRIC MORPHOMETRICS OF SCULPINS

   https://doi.org/10.1002/ar.23752  

   Buser, Thaddaeus J. ; Sidlauskas, Brian L. ; Summers, Adam P. ( May 2018 , The Anatomical Record)
2. Low-Temperature 2D/2D Ohmic Contacts in WSe ₂ Field-Effect Transistors as a Platform for the 2D Metal–Insulator Transition

   https://doi.org/10.1021/acsami.0c21440  

   Stanley, Lily J. ; Chuang, Hsun-Jen ; Zhou, Zhixian ; Koehler, Michael R. ; Yan, Jiaqiang ; Mandrus, David G. ; Popović, Dragana ( February 2021 , ACS Applied Materials & Interfaces)

   We report the fabrication of hexagonal-boron-nitride (hBN) encapsulated multi-terminal WSe_2 Hall bars with 2D/2D low-temperature Ohmic contacts as a platform for investigating the two-dimensional (2D) metal-insulator transition. We demonstrate that the WSe_2 devices exhibit Ohmic behavior down to 0.25 K and at low enough excitation voltages to avoid current-heating effects. Additionally, the high-quality hBN-encapsulated WSe_2 devices in ideal Hall-bar geometry enable us to accurately determine the carrier density. Measurements of the temperature (T) and density (n_s) dependence of the conductivity \sigma(T,n_s) demonstrate scaling behavior consistent with a metal-insulator quantum phase transition driven by electron-electron interactions, but where disorder-induced local magnetic moments are also present. Our findings pave the way for further studies of the fundamental quantum mechanical properties of 2D transition metal dichalcogenides using the same contact engineering.
3. Strain-Driven and Layer-Number-Dependent Crossover of Growth Mode in van der Waals Heterostructures: 2D/2D Layer-By-Layer Horizontal Epitaxy to 2D/3D Vertical Reorientation

   https://doi.org/10.1002/admi.201800382  

   Choudhary, Nitin ; Chung, Hee-Suk ; Kim, Jung Han ; Noh, Chanwoo ; Islam, Md Ashraful ; Oh, Kyu Hwan ; Coffey, Kevin ; Jung, YounJoon ; Jung, Yeonwoong ( July 2018 , Advanced Materials Interfaces)
4. 2D molybdenum and vanadium nitrides synthesized by ammoniation of 2D transition metal carbides (MXenes)

   https://doi.org/10.1039/c7nr06721f  

   Urbankowski, Patrick ; Anasori, Babak ; Hantanasirisakul, Kanit ; Yang, Long ; Zhang, Lihua ; Haines, Bernard ; May, Steven J. ; Billinge, Simon J. ; Gogotsi, Yury ( January 2017 , Nanoscale)

   MXenes are a rapidly growing class of 2D transition metal carbides and nitrides, finding applications in fields ranging from energy storage to electromagnetic interference shielding and transparent conductive coatings. However, while more than 20 carbide MXenes have already been synthesized, Ti 4 N 3 and Ti 2 N are the only nitride MXenes reported so far. Here by ammoniation of Mo 2 CT x and V 2 CT x MXenes at 600 °C, we report on their transformation to 2D metal nitrides. Carbon atoms in the precursor MXenes are replaced with N atoms, resulting from the decomposition of ammonia molecules. The crystal structures of the resulting Mo 2 N and V 2 N were determined with transmission electron microscopy and X-ray pair distribution function analysis. Our results indicate that Mo 2 N retains the MXene structure and V 2 C transforms to a mixed layered structure of trigonal V 2 N and cubic VN. Temperature-dependent resistivity measurements of the nitrides reveal that they exhibit metallic conductivity, as opposed to semiconductor-like behavior of their parent carbides. As important, room-temperature electrical conductivity values of Mo 2 N and V 2 N are three and one order of magnitude larger than those ofmore »the Mo 2 CT x and V 2 CT x precursors, respectively. This study shows how gas treatment synthesis such as ammoniation can transform carbide MXenes into 2D nitrides with higher electrical conductivities and metallic behavior, opening a new avenue in 2D materials synthesis.« less
5. H-Mediated Magnetic Interactions between Layers in a 2D Mn ^II -Dicyanamide Polymer: Neutron Diffraction, DFT, and Quantum Monte Carlo Calculations: H-Mediated Magnetic Interactions between Layers in a 2D Mn ^II -Dicyanamide Polymer: Neutron Diffraction, DFT, and Quantum Monte Carlo Calculations

   https://doi.org/10.1002/ejic.201700971  

   Gillon, Béatrice ; Hammerschmied, Albert ; Gukasov, Arsen ; Cousson, Alain ; Cauchy, Thomas ; Ruiz, Eliseo ; Schlueter, John A. ; Manson, Jamie L. ( January 2018 , European Journal of Inorganic Chemistry)