Hydroxyapatite–bioglass nanocomposites: Structural, mechanical, and biological aspects

• Olga Shikimaka,
• Mihaela Bivol,
• Bogdan A. Sava,
• Marius Dumitru,
• Christu Tardei,
• Beatrice G. Sbarcea,
• Daria Grabco,
• Constantin Pyrtsac,
• Daria Topal,
• Andrian Prisacaru,
• Vitalie Cobzac and
• Viorel Nacu

Beilstein J. Nanotechnol. 2022, 13, 1490–1504, doi:10.3762/bjnano.13.123

• refinement to obtain a mirror-like surface. The depth-sensing MI was carried out on a PMT-3NI-02 instrumented nano/microindentation device using a Vickers diamond tetrahedral pyramid as an indenter. For the calculation of microhardness (H), the Oliver–Pharr method was applied [39]. The range of used loads

Determination of elastic moduli of elastic–plastic microspherical materials using nanoindentation simulation without mechanical polishing

• Hongzhou Li and
• Jialian Chen

Beilstein J. Nanotechnol. 2021, 12, 213–221, doi:10.3762/bjnano.12.17

• Hongzhou Li Jialian Chen College of Environmental Science and Engineering, Engineering Research Center of Polymer Resources Green Recycling of Ministry of Education, Fujian Normal University, Fuzhou 350007, China 10.3762/bjnano.12.17 Abstract When using the Oliver–Pharr method, the indented

• encountered in engineering. The simulated results indicate that contact height is unsuitable to replace contact depth for obtaining the indentation elastic modulus of microspherical materials. The extracted elastic modulus of a microsphere using the Oliver–Pharr method with the simulated unloading curve

• depends on the indentation depth. It demonstrates that nanoindentation on microspherical materials exhibits a “size effect”. Keywords: elastic–plastic; microsphere; nanoindentation; Oliver–Pharr method; simulation; Introduction Instrumented nanoindentation is the most commonly used technique for the

Synthesis of hafnium nanoparticles and hafnium nanoparticle films by gas condensation and energetic deposition

• Irini Michelakaki,
• Nikos Boukos,
• Dimitrios A. Dragatogiannis,
• Spyros Stathopoulos,
• Costas A. Charitidis and
• Dimitris Tsoukalas

Beilstein J. Nanotechnol. 2018, 9, 1868–1880, doi:10.3762/bjnano.9.179

• modulus (E) values were extracted from the experimental data (load–displacement curves) using the Oliver–Pharr method [74]. TEM image of the as deposited Hf nanoparticles with mean sizes of (diameter × height) a) 16 nm × 15 nm (aggregation-zone length D = 100 mm); b) 9.5 nm × 7 nm (aggregation-zone length