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

• grains with different orientation. Furthermore, catalyst migration along the SiNW backbone was observed in some cases (Figure 1c). Although the SiNWs grown by the VLS mechanism possess are crystalline, the silicon shells deposited onto the nanowires by thermal CVD (here using a temperature of 520 °C) can

Investigation of growth dynamics of carbon nanotubes

• Marianna V. Kharlamova

Beilstein J. Nanotechnol. 2017, 8, 826–856, doi:10.3762/bjnano.8.85

• also the rate-limiting step of the growth. The authors of [43] applied the surface diffusion model to explain fast growth rates of SWCNTs in the thermal CVD process at temperatures as low as 600 °C. In [41], Helveg with co-authors performed the first time-resolved in situ HRTEM studies on the formation

Synthesis and applications of carbon nanomaterials for energy generation and storage

• Marco Notarianni,
• Jinzhang Liu,
• Kristy Vernon and
• Nunzio Motta

Beilstein J. Nanotechnol. 2016, 7, 149–196, doi:10.3762/bjnano.7.17

• in the chamber [56]; laser-assisted thermal CVD, where a continuous wave CO2 laser with medium power is applied perpendicular to a substrate, then pyrolyses sensitized mixtures of acetylene and Fe(CO)5 vapor in a flow reactor [57]; and high-pressure catalytic decomposition of carbon monoxide (HiPco

Using natural language processing techniques to inform research on nanotechnology

• Nastassja A. Lewinski and
• Bridget T. McInnes

Beilstein J. Nanotechnol. 2015, 6, 1439–1449, doi:10.3762/bjnano.6.149

• purification control in 2005–2006, to plasma-enhanced and thermal CVD in 2007–2010. CVD is the dominant commercial synthesis approach and catalyzed CVD with fluidized bed has been used by Bayer to synthesize Baytubes [29]. Competitor analysis revealed overlap between Sony and an individual researcher, Young

Gas sensing with gold-decorated vertically aligned carbon nanotubes

• Prasantha R. Mudimela,
• Mattia Scardamaglia,
• Oriol González-León,
• Nicolas Reckinger,
• Rony Snyders,
• Eduard Llobet,
• Carla Bittencourt and
• Jean-François Colomer

Beilstein J. Nanotechnol. 2014, 5, 910–918, doi:10.3762/bjnano.5.104

• , regardless of the nanotube length. Keywords: alignment; carbon nanotubes; decoration; gas sensors; metal nanoparticles; thermal CVD; Introduction The interest in gas sensing for reaching a widespread, continuous pollution detection and control has been growing steadily in the last decades due to the

• 10 ppb of nitrogen dioxide is possible at room temperature, the sensor does not recover its baseline resistance when cleaning in dry air at such low temperature [8]. Ueda et al. using VA-CNTs synthesized by thermal CVD as sensing active layer showed that variation in the conductivity was proportional

• morphology of the active layer and its chemical composition was characterized by using scanning and transmission electron microscopies (SEM and TEM), and X-ray photoelectron spectroscopy (XPS), respectively. Experimental Vertically aligned carbon nanotube growth VA-CNT synthesis was carried out in a thermal

Functionalization of vertically aligned carbon nanotubes

• Eloise Van Hooijdonk,
• Carla Bittencourt,
• Rony Snyders and
• Jean-François Colomer

Beilstein J. Nanotechnol. 2013, 4, 129–152, doi:10.3762/bjnano.4.14

• provides a highly reactive environment compared with thermal CVD, allowing lower synthesis temperatures. An activation energy of about 1.2–1.8 eV [44][45] characterizes the thermal CVD while a lower activation energy of ≈0.3 eV [46] was reported for the PECVD. These energies are defined taking into account

• structure. Hoffman et al. [47] demonstrated that the limiting step in the determination of the activation energy for thermal CVD is the dissociation of the precursor molecule and, for PECVD, is the carbon diffusion on the catalyst. Thanks to the low temperatures in PECVD compared to the temperatures in

• thermal CVD, substrates that could be damaged at high temperature (for example glass) can be used as a support for VA-CNTs or their synthesis can be performed directly integrated in devices [48]. The CVD involves the decomposition of hydrocarbon gas molecules on the surfaces of catalyst nanoparticles

Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes

• Ravi Joshi,
• Benjamin Waldschmidt,
• Jörg Engstler,
• Rolf Schäfer and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2011, 2, 734–739, doi:10.3762/bjnano.2.80

• modifications of the CVD technique exist that allow growth processes under moderate conditions even below 400 °C [1][2][3]. Therefore obtaining more-selective catalysts that may allow reduction of the synthesis temperature in thermal CVD processes even further, while at the same time maintaining a high quality