Revealing the local crystallinity of single silicon core–shell nanowires using tip-enhanced Raman spectroscopy

• Marius van den Berg,
• Ardeshir Moeinian,
• Arne Kobald,
• Yu-Ting Chen,
• Anke Horneber,
• Steffen Strehle,
• Alfred J. Meixner and
• Dai Zhang

Beilstein J. Nanotechnol. 2020, 11, 1147–1156, doi:10.3762/bjnano.11.99

• using a core–shell SiNW. Conclusion Local structural properties, such as changes in the fraction of crystallinity of a c-Si/a-Si core–shell nanowire are characterized confocally at an optical resolution of about 300 nm. Applying tip-enhanced Raman spectroscopy, we show that variations of the intensity

High-performance asymmetric supercapacitor made of NiMoO₄ nanorods@Co₃O₄ on a cellulose-based carbon aerogel

• Meixia Wang,
• Jing Zhang,
• Xibin Yi,
• Benxue Liu,
• Xinfu Zhao and
• Xiaochan Liu

Beilstein J. Nanotechnol. 2020, 11, 240–251, doi:10.3762/bjnano.11.18

• , which exhibited a capacitance of 3.6 F/cm2 at 3 mA/cm2, a capacitance retention of 82% and an increase of the current density from 3 to 15 mA/cm2 [21]. Cai et al. reported a facile two-step hydrothermal method to synthesize unique 3D Co3O4/NiMoO4 core/shell nanowire arrays on Ni foam, and the resulting

Renewable energy conversion using nano- and microstructured materials

• Harry Mönig and
• Martina Schmid

Beilstein J. Nanotechnol. 2019, 10, 771–773, doi:10.3762/bjnano.10.76

• benefits arising from core–shell nanowire arrays for Si heterojunction solar cells. Contacts with a high surface-to-volume ratio can clearly be seen. Particularly in photovoltaics, they may be prone to increased recombination losses. For other applications, such as water splitting, porous materials may

Geometrical optimisation of core–shell nanowire arrays for enhanced absorption in thin crystalline silicon heterojunction solar cells

• Robin Vismara,
• Olindo Isabella,
• Andrea Ingenito,
• Fai Tong Si and
• Miro Zeman

Beilstein J. Nanotechnol. 2019, 10, 322–331, doi:10.3762/bjnano.10.31

Robust topological phase in proximitized core–shell nanowires coupled to multiple superconductors

• Tudor D. Stanescu,
• Anna Sitek and
• Andrei Manolescu

Beilstein J. Nanotechnol. 2018, 9, 1512–1526, doi:10.3762/bjnano.9.142

• the other hand, this richness is associated with rather fragile topological phases [29]. In practice, it would be extremely useful to have a knob enabling one to control the robustness of topological superconducting phase. In this work we show that coupling a core–shell nanowire to two or more parent

• model that describes the low-energy physics of a core–shell nanowire with n edges. The model has already been introduced for triangular core–shell nanowires in [29] (Appendix), and also previously considered by other authors, in different forms, for ladder systems [38][39]. A “coarse-grained” shell is

• consider a triangular core–shell nanowire modeled by six chains, as described above, which are coupled to three separate superconductors that induce pairing potentials characterized by 1 = 0, 3 = π/2, and 5 = −π/2. The other parameters are the same as in Figure 2B, i.e., the case Veff ≠ 0 discussed above

Modeling of the growth of GaAs–AlGaAs core–shell nanowires

• Qian Zhang,
• Peter W. Voorhees and
• Stephen H. Davis

Beilstein J. Nanotechnol. 2017, 8, 506–513, doi:10.3762/bjnano.8.54

• . Acknowledgements The authors would like to thank Jean-Noël Aqua, Lincoln J. Lauhon and Anna Fontcuberta i Morral for helpful discussions. This research was supported by the Office of Naval Research under Grant no. N00014-14-1-0697. Schematic of a core–shell nanowire (left) with possible configurations of the cross

• . (red: six {110} facets; blue: six {112} facets.) (b) Evolution of the ratio between the lengths of the facets shown in (a). (a) Cross section of the core–shell nanowire with six {112} facets (blue color) along the corners of six {110} facets (red color) in the numerical simulation; the stripe structure

• along the directions within 25 nm of thickness of the shell. (b) The experimental result showing Al-rich stripes along the directions (dark lines) obtained in [3]. (a) Cross section of the core–shell nanowire with six {112} facets (blue color) along the corners of six {110} facets (red color) in the

Simulation of thermal stress and buckling instability in Si/Ge and Ge/Si core/shell nanowires

• Suvankar Das,
• Amitava Moitra,
• Mishreyee Bhattacharya and
• Amlan Dutta

Beilstein J. Nanotechnol. 2015, 6, 1970–1977, doi:10.3762/bjnano.6.201

• proposed methodology can be extended to other materials and structures and helps with the prediction of the conditions under which a nanowire-based device might possibly fail due to elastic instability. Keywords: atomistic simulation; buckling; core–shell nanowire; thermal stress; Introduction In recent

The Kirkendall effect and nanoscience: hollow nanospheres and nanotubes

• Abdel-Aziz El Mel,
• Ryusuke Nakamura and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2015, 6, 1348–1361, doi:10.3762/bjnano.6.139

• on the outer skin of the metal nanowire resulting in the formation of a thin layer of metal oxide (Figure 9a). After the formation of a metal/metal oxide core/shell nanowire, the metal ions diffuse outward through the oxide layer until reaching the outer surface. Simultaneously, the oxygen adsorbed

• the presence of an oscillating stress field with a periodic fluctuation along the wire’s axis due to the initial rippled structure of the core/shell nanowire [72]. Indeed, the fact that the stress gradient is higher in the thin areas of the wire compared to the thick ones, the void nucleation becomes

Nanostructure sensitization of transition metal oxides for visible-light photocatalysis

• Hongjun Chen and
• Lianzhou Wang

Beilstein J. Nanotechnol. 2014, 5, 696–710, doi:10.3762/bjnano.5.82

• ][44], CdTe quantum dot monolayer sensitized ZnO nanowire [45], CdS nanoparticle/ZnO nanowire array [46][47], CdS/ TiO2 nanofibers heteroarchitectures [48], ZnO/CdS core/shell nanowire [49], CdS nanowires decorated with TiO2 nanoparticles [50], and their potential applications for photoelectrochemical