Morphology-driven gas sensing by fabricated fractals: A review

• Vishal Kamathe and
• Rupali Nagar

Beilstein J. Nanotechnol. 2021, 12, 1187–1208, doi:10.3762/bjnano.12.88

• this origin location. The second particle diffuses via random walk, reaches a site close to the seed particle, and subsequently comes to a stop. In a similar way, other particles are added one by one and allowed to move randomly or guided by diffusion [54]. The added particles eventually reach their

Bi-layer sandwich film for antibacterial catheters

• Gerhard Franz,
• Florian Schamberger,
• Hamideh Heidari Zare,
• Sara Felicitas Bröskamp and
• Dieter Jocham

Beilstein J. Nanotechnol. 2017, 8, 1982–2001, doi:10.3762/bjnano.8.199

• challenging issue (Figure 6). The transport of the film-building species (cf. Equation 1) happens through diffusion (random walk), not through convection (flow). Even for molecules that do not form a deposit, a linear density gradient will form. But deposition of film-building molecules will reduce their

• = 108 Å2, diffusion coefficient D = 3750 cm2/s with a thermal speed of 550 m/sec), the diffusion length Λ is calculated via the equation for the random walk . This means diffusion predominates convective flow, and the loss of monomers that will form a polymeric chain via Figure 4 has to be taken into

Diffusion of dilute gas in arrays of randomly distributed, vertically aligned, high-aspect-ratio cylinders

• Wojciech Szmyt,
• Carlos Guerra and
• Ivo Utke

Beilstein J. Nanotechnol. 2017, 8, 64–73, doi:10.3762/bjnano.8.7

• collisions of molecules with the nanocylinder walls (mean time of flight), (iii) the surface impingement rate, and (iv) the Knudsen number of such a system were rigidly derived based on a random-walk model of a molecule that undergoes memoryless, diffusive reflections from nanocylinder walls assuming the

• : dilute gas; gas transport; molecular diffusion; nanocylinders; random walk; Introduction Arrays of vertically aligned nanowires and nanotubes with high-aspect ratio composed of various materials have been widely used in science and industry. Arrays of silicon nanowires [1][2] and carbon nanotubes [3

• coefficient D inside such arrays, the time between collisions of molecules with nanocylinder walls, τ, the molecule surface impingement rate, J, and the Knudsen number of such a system, Kn. The derivations have been performed employing a random-walk model of gas molecules undergoing memoryless, diffusive

A visible-light-driven composite photocatalyst of TiO₂ nanotube arrays and graphene quantum dots

• Donald K. L. Chan,
• Po Ling Cheung and
• Jimmy C. Yu

Beilstein J. Nanotechnol. 2014, 5, 689–695, doi:10.3762/bjnano.5.81

• -dimensional nanostructures, TiO2 nanotube arrays (TNAs) synthesized by anodic oxidation of titanium had attracted particular interests [6][7]. Comparing with bulk nanoparticles, smooth walls of nanotubes provide a lower surface state density hence lowering recombination probability. Random walk of charges is

Nanolesions induced by heavy ions in human tissues: Experimental and theoretical studies

• Marcus Bleicher,
• Lucas Burigo,
• Marco Durante,
• Maren Herrlitz,
• Michael Krämer,
• Igor Mishustin,
• Iris Müller,
• Francesco Natale,
• Igor Pshenichnov,
• Stefan Schramm,
• Gisela Taucher-Scholz and
• Cathrin Wälzlein

Beilstein J. Nanotechnol. 2012, 3, 556–563, doi:10.3762/bjnano.3.64

• than a condensed random walk, to describe radiation action at the lowest possible level. When inspecting the nanoscale, however, not only the usual ionization and excitation events, but also elastic scattering of the primary ion, which is often neglected, may play a role. Therefore we have included