Synthesis of silver–palladium Janus nanoparticles using co-sputtering of independent sources: experimental and theorical study

• Maria J. Martínez-Carreón,
• Francisco Solís-Pomar,
• Abel Fundora,
• Claudio D. Gutiérrez-Lazos,
• Sergio Mejía-Rosales,
• Hector N. Fernández-Escamilla,
• Jonathan Guerrero-Sánchez,
• Manuel F. Meléndrez and
• Eduardo Pérez-Tijerina

Beilstein J. Nanotechnol. 2024, 15, 808–816, doi:10.3762/bjnano.15.67

• validates the condensed gas technique for obtaining BNPs. As an aid for the interpretation of the experimental TEM micrographs, a set of simulated micrographs of model Janus particles were generated. Figure 2 and Figure 3 show that the BNPs consist of two distinct regions, differing from each other in

• intensity and atomic lattice. The crystal structures of Ag and Pd are quite similar; both elements are fcc with almost the same atomic mass, but their atomic radii differ by about 12%. We built a model of Janus particles formed by an fcc spherical volume where a Pd region partially covers an Ag region and

• Pd atoms. The bimetallic alloy surface was optimized (Figure 7b), and the calculated (111) interplanar distances are 2.40 Å in the bulk phase and 2.38 Å at the surface (see Figure 7c). To explore the Janus particles that involve AgPd, the Ag/AgPd and Pd/AgPd models were first optimized by

Solvent-induced assembly of mono- and divalent silica nanoparticles

• Bin Liu,
• Etienne Duguet and
• Serge Ravaine

Beilstein J. Nanotechnol. 2023, 14, 52–60, doi:10.3762/bjnano.14.6

• experimentally utilized to drive particles with a spherical cavity and complementary microspheres to form colloidal clusters [18]. Colloidal chains have been obtained by the assembly of Janus particles with one face selectively functionalized with DNA containing a self-complementary sticky end [19], particles

Bombyx mori silk/titania/gold hybrid materials for photocatalytic water splitting: combining renewable raw materials with clean fuels

• Stefanie Krüger,
• Michael Schwarze,
• Otto Baumann,
• Christina Günter,
• Michael Bruns,
• Christian Kübel,
• Dorothée Vinga Szabó,
• Rafael Meinusch,
• Verónica de Zea Bermudez and
• Andreas Taubert

Beilstein J. Nanotechnol. 2018, 9, 187–204, doi:10.3762/bjnano.9.21

• entire UV–visible range when the TiO2 is composed of 75% of anatase and 25% of rutile with identical AuNPs [26]. In an interesting new approach, Zhang et al. found that Janus particles (rather than the core–shell or randomly organized materials described so far) based on large TiO2 particles with

Biological responses to nanoscale particles

• Reinhard Zellner

Beilstein J. Nanotechnol. 2015, 6, 380–382, doi:10.3762/bjnano.6.37

• conjugates of biomolecules, magnetism, radioactivity, Janus particles and core–shell particles were combined. In particular, the use of fluorescently labeled particles has become one of the preferred tools to track nanoparticles inside cells and tissue. When nanoparticles are exposed to biological fluids

Comparative evaluation of the impact on endothelial cells induced by different nanoparticle structures and functionalization

• Lisa Landgraf,
• Ines Müller,
• Peter Ernst,
• Miriam Schäfer,
• Christina Rosman,
• Isabel Schick,
• Oskar Köhler,
• Hartmut Oehring,
• Vladimir V. Breus,
• Thomas Basché,
• Carsten Sönnichsen,
• Wolfgang Tremel and
• Ingrid Hilger

Beilstein J. Nanotechnol. 2015, 6, 300–312, doi:10.3762/bjnano.6.28

• nanoparticles on endothelial cells. Our findings will help to design new nanoparticles with optimized properties concerning biocompatibility and uptake behavior with respect to the respective intended application. Keywords: cell viability; gold nanoparticles; internalization; Janus particles; quantum dots

• 20 nm were taken up by caveolae-mediated endocytosis, this holds true for Janus particles as well as for the spherical ones. Conclusion This comparative investigation of different nanoparticle shapes, sizes and functionalization revealed five major rules for endothelial cells. 1) In general, an

• elongated shape of gold nanoparticle rods and gold@metal oxide Janus particles leads to a stronger reduction in cell metabolic activity. 2) Endothelial cells react sensitively towards positively charged surfaces, e.g., caused by the surfactants NH2 and CyA. 3) Internalization of nanoparticles is driven by a

Inorganic Janus particles for biomedical applications

• Isabel Schick,
• Steffen Lorenz,
• Dominik Gehrig,
• Stefan Tenzer,
• Wiebke Storck,
• Karl Fischer,
• Dennis Strand,
• Frédéric Laquai and
• Wolfgang Tremel

Beilstein J. Nanotechnol. 2014, 5, 2346–2362, doi:10.3762/bjnano.5.244

• -nanostructures including either purely organic or inorganic, as well as composite organic–inorganic compounds. Janus particles are interconnected by solid state interfaces and, therefore, are distinguished by two physically or chemically distinct surfaces. They may be, for instance, hydrophilic on one side and

• hydrophobic on the other, thus, creating giant amphiphiles revealing the endeavor of self-assembly. Novel optical, electronic, magnetic, and superficial properties emerge in inorganic Janus particles from their dimensions and unique morphology at the nanoscale. As a result, inorganic Janus nanoparticles are

• activity, the magnetic properties, as well as their biocompatibility and interaction with human blood serum. Keywords: bioimaging (CT; MRI; Multi-photon); hetero-nanoparticles; Janus particles; protein corona; synthesis; Introduction In the recent years, there has been an increasing interest in design