Mechanistic insights into plasmonic photocatalysts in utilizing visible light

• Kah Hon Leong,
• Azrina Abd Aziz,
• Lan Ching Sim,
• Pichiah Saravanan,
• Min Jang and
• Detlef Bahnemann

Beilstein J. Nanotechnol. 2018, 9, 628–648, doi:10.3762/bjnano.9.59

• the LSPR feature in the Cu7S4@Pd catalyst. They found that Pd NPs showed weak LSPR absorption at 808, 980 and 1500 nm, while Cu7S4 exhibited obvious electrical field enhancement at these wavelengths; thus Cu7S4 was found to be the dominant contributor to the LSPR feature [111]. Using a similar

• drops of catalyst (ammonium dimolybdate) for the oxidation of I− by H2O2. Thus, I3− was obtained in the solution and was measured at 360 nm. Alternatively, when Ti4+ ions were used as indicators, yellow-coloured metal complexes with H2O2 were formed and examined at 410 nm. [118]. The DPD method is based

• - acetic acid mediated with horseradish peroxidase as a catalyst. The complete reaction scheme is explained in Figure 13a [115]. The intensity of the generated fluorescence is analysed using a fluorescence spectrophotometer with an emission wavelength of 408.5 nm excited at 316.5 nm. The concentration of

Facile synthesis of ZnFe₂O₄ photocatalysts for decolourization of organic dyes under solar irradiation

• Arjun Behera,
• Debasmita Kandi,
• Sanjit Manohar Majhi,
• Satyabadi Martha and
• Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 436–446, doi:10.3762/bjnano.9.42

• step, the adsorption ability of the catalyst was studied under dark conditions for 30 min. It was confirmed that the adsorption effect of the catalyst is negligible regarding the decolourization of a Congo red solution. Then 0.02 g of photocatalyst was used to decolourize 20 mL of 10 ppm of Congo red

• molecules in the solution (•O2−, •HO2, H2O2). TA readily reacts with •OH and forms 2-hydroxyterephthalic acid (HTA) via the reaction shown in Scheme 1. In a typical procedure, 5 mM of TA was mixed with the required amount of catalyst and an equimolar ratio of NaOH, as TA is not soluble in acidic or neutral

• −5 M solution of nitroblue tetrazolium (NBT) was taken as molecular probe. 0.01 g of ZFO was dispersed in 10 mL of the prepared NBT solution and irradiated under solar light for 1 h. After reaction, the catalyst was separated and the solution analysed in an UV spectrophotometer. Figure 11c shows the

Engineering of oriented carbon nanotubes in composite materials

• Razieh Beigmoradi,
• Abdolreza Samimi and
• Davod Mohebbi-Kalhori

Beilstein J. Nanotechnol. 2018, 9, 415–435, doi:10.3762/bjnano.9.41

• of CNT nanocomposites could be fulfilled [14][27][28][29][30]. In terms of processing techniques, the arrangement and alignment of CNTs in a matrix of composite materials are divided in two categories. In the first category alignment is arranged during growth, where the regular placement of catalyst

• of a wide range of materials, spraying can be combined with other methods to fabricate composite materials. In this method, a sheet of CNTs is produced by chemical vapor deposition (CVD) on a SiO2/Si substrate that is coated with a very thin layer of iron as a catalyst. The CNT rows have been grown

• may reduce the required magnetic field [108][109][110]. Aleman et al. have recently reported the ferromagnetism of residual catalysts in CVD growth of CNTs. This work shows that adjustment of the size and shape of the catalyst nanoparticle can control the CNT ferromagnetism behavior. This phenomenon

Photocatalytic and adsorption properties of TiO₂-pillared montmorillonite obtained by hydrothermally activated intercalation of titanium polyhydroxo complexes

• Mikhail F. Butman,
• Nikolay L. Ovchinnikov,
• Nikita S. Karasev,
• Nataliya E. Kochkina,
• Alexander V. Agafonov and
• Alexandr V. Vinogradov

Beilstein J. Nanotechnol. 2018, 9, 364–378, doi:10.3762/bjnano.9.36

• the performance of the catalyst [53]. In addition, anatase and rutile phase ratio can play an important role, which, as noted in [54], can significantly affect the rate of photocatalytic decomposition. While interpreting the photocatalytic activity of TiO2-pillared clays one should keep in mind the

BN/Ag hybrid nanomaterials with petal-like surfaces as catalysts and antibacterial agents

• Konstantin L. Firestein,
• Denis V. Leybo,
• Alexander E. Steinman,
• Andrey M. Kovalskii,
• Andrei T. Matveev,
• Anton M. Manakhov,
• Irina V. Sukhorukova,
• Pavel V. Slukin,
• Nadezda K. Fursova,
• Sergey G. Ignatov,
• Dmitri V. Golberg and
• Dmitry V. Shtansky

Beilstein J. Nanotechnol. 2018, 9, 250–261, doi:10.3762/bjnano.9.27

• these BN NPs are thought to demonstrate advanced characteristics as catalyst supports. Also, colloidal silver is effective against different types of microorganisms, therefore BN/Ag HNMs are of great interest as antibacterial agents. For example, it has been reported by Gao et al. [10] that the

• -BN compared with commonly used catalyst supports (i.e., SiO2, Al2O3, etc.). An important question that needs additional analysis is the role of catalyst support morphology. In contrast to the previous works, that were focused on the catalytic activity of 2D BN nanosheets decorated with Ag NPs during

• NPs demonstrated a possibility to create an “eternal catalyst”. The best catalytic characteristics (100% methanol conversion at 350 °C) were achieved for the UV BN/Ag HNMs without preliminary activation stage. Our results also confirmed that both types of BN/Ag HNMs possess a strong antibacterial

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

• to a wealth of studies on photocatalytic water splitting [6][7][8][9][10]. To be successful, the water splitting catalyst needs to have a certain set of properties. Most prominently, it should have a bandgap of at least 1.23 eV to provide the energy needed to split water. However, the bandgap should

• at higher temperatures [24]. Following the same general idea, Gärtner et al. investigated the effect of different Au precursors for Au loading via in situ photodeposition with sodium tetrachloridoaurate(III) dihydrate (NaAuCl4·2H2O) providing the most efficient water splitting catalyst. The same

• at an intensity of about 1000 W/m2 as light source. For comparison a 300 W Xe-lamp without the AM1.5G filter was also used. In a typical experiment, the catalyst and a stirring bar were placed in the reactor. Then the setup was evacuated three times and filled with argon (Ar) to remove residual

Dopant-stimulated growth of GaN nanotube-like nanostructures on Si(111) by molecular beam epitaxy

• Alexey D. Bolshakov,
• Alexey M. Mozharov,
• Georgiy A. Sapunov,
• Igor V. Shtrom,
• Nickolay V. Sibirev,
• Vladimir V. Fedorov,
• Evgeniy V. Ubyivovk,
• Maria Tchernycheva,
• George E. Cirlin and
• Ivan S. Mukhin

Beilstein J. Nanotechnol. 2018, 9, 146–154, doi:10.3762/bjnano.9.17

• absence of a doping flux [16]. Compared to other widely studied III–V NWs (e.g., Al(Ga, In)As), which can be synthesized by MBE on Si substrates via a vapor–liquid–solid (VLS) mechanism that uses catalyst droplets, GaN NWs grow according to the self-induced mechanism in the absence of catalyst [17][18

Combined scanning probe electronic and thermal characterization of an indium arsenide nanowire

• Tino Wagner,
• Fabian Menges,
• Heike Riel,
• Bernd Gotsmann and
• Andreas Stemmer

Beilstein J. Nanotechnol. 2018, 9, 129–136, doi:10.3762/bjnano.9.15

• -patterned wafer on which they where localized and contacted by e-beam lithography. The InAs NWs studied were grown in a metal-organic vapor deposition (MOCVD) system by vapor–liquid–solid (VLS) growth using a gold particle as catalyst and using trimethylindium (TMIn) and tert-butylarsine (TBA) as precursors

Atomic layer deposition and properties of ZrO₂/Fe₂O₃ thin films

• Kristjan Kalam,
• Helina Seemen,
• Peeter Ritslaid,
• Mihkel Rähn,
• Aile Tamm,
• Kaupo Kukli,
• Aarne Kasikov,
• Joosep Link,
• Raivo Stern,
• Salvador Dueñas,
• Helena Castán and
• Héctor García

Beilstein J. Nanotechnol. 2018, 9, 119–128, doi:10.3762/bjnano.9.14

• the tetragonal phase [7]. Microwave-assisted combustion synthesis of a powder and the subsequent sintering of samples were used to fabricate ZrO2 doped with Co, and ferromagnetism in such samples was confirmed [8]. Different nanostructures of undoped ZrO2 were prepared by catalyst-assisted PLD and all

Comparative study of post-growth annealing of Cu(hfac)₂, Co₂(CO)₈ and Me₂Au(acac) metal precursors deposited by FEBID

• Marcos V. Puydinger dos Santos,
• Aleksandra Szkudlarek,
• Artur Rydosz,
• Carlos Guerra-Nuñez,
• Fanny Béron,
• Kleber R. Pirota,
• Stanislav Moshkalev,
• José Alexandre Diniz and
• Ivo Utke

Beilstein J. Nanotechnol. 2018, 9, 91–101, doi:10.3762/bjnano.9.11

• literature [62], showing a superior graphitisation efficiency for Co as catalyst atom when compared to Cu. The slightly lower intensity ratios for Cu–C (average of around 8%), compared to Co–C, supports this claim. Furthermore, regarding the graphitisation in presence of Au, the lower integrated intensity

Review on optofluidic microreactors for artificial photosynthesis

• Xiaowen Huang,
• Jianchun Wang,
• Tenghao Li,
• Jianmei Wang,
• Min Xu,
• Weixing Yu,
• Abdel El Abed and
• Xuming Zhang

Beilstein J. Nanotechnol. 2018, 9, 30–41, doi:10.3762/bjnano.9.5

• catalytic materials, modification of the existed catalytic materials (e.g., noble-gas doping, co-catalyst impregnation, noble-metal loading, plasmonic sensitization and Z-scheme systems), and optofluidics (or microfluidics) based APS. It should be noted that many efforts have been made to develop bio

• paper composite membrane for the photoreduction of CO2 [76], as shown in Figure 6. Using this device, they studied the factors that affected the methanol yield (such as flow rate, light intensity and catalyst loading) and obtained a high reduction result in comparison to the reported data. Other

• catalyst-coated micropillars. Reprint with the permission from [74], copyright 2014 Elsevier Ltd. (A) Schematic of the high-surface-area optofluidic microreactor with micro-grooved structure. (B) Fabrication procedure of the optofluidic microreactor with the catalysts on the PDMS substrate. Adapted from

Facile synthesis of silver/silver thiocyanate (Ag@AgSCN) plasmonic nanostructures with enhanced photocatalytic performance

• Xinfu Zhao,
• Dairong Chen,
• Abdul Qayum,
• Bo Chen and
• Xiuling Jiao

Beilstein J. Nanotechnol. 2017, 8, 2781–2789, doi:10.3762/bjnano.8.277

• catalyst due to its wide bandgap of 3.2 eV, which limits its practical application. Therefore, the development of new photocatalysts with visible-light catalytic performance, high surface active sites and long life of separated electron and hole pairs, has become a hot research topic in recent years. Ag

• cycle was almost the same as for the first cycle, which is notable for a Ag-based catalyst. Results and Discussion Ag@AgSCN nanostructures Ag@AgSCN nanostructures were synthesized by a simple precipitation method, followed by UV-light-induced reduction. As shown in Figure 1a, all the XRD patterns of the

• absorption of Ag@AgSCN in both the UV and visible region, which is beneficial for application as a visible-light catalyst. The bandgap of AgSCN can be determined according to the Kubelka–Munk equation, which is estimated as 3.4 eV for sample M0 (Figure 2b), and the valence band value of 1.12 eV is obtained

CdSe nanorod/TiO₂ nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity

• Fakher Laatar,
• Hatem Moussa,
• Halima Alem,
• Lavinia Balan,
• Emilien Girot,
• Ghouti Medjahdi,
• Hatem Ezzaouia and
• Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 2741–2752, doi:10.3762/bjnano.8.273

• TiO2 and CdSe/TiO2 composites loaded with 0.5, 1, 2, and 5 wt % CdSe, respectively (Figure S4, Supporting Information File 1). Influence of the photocatalyst dosage and rhodamine B concentration The photodegradation efficiency is generally affected by the amount of catalyst used and by the

• concentration of the pollutant. First, we investigated the influence of the catalyst concentration (25, 50 or 100 mg in 50 mL of RhB solution) (Figure 7a). Using 25 mg of the CdSe (2 wt %)/TiO2 photocatalyst, the dye decomposition required 255 min while the degradation could be achieved within 75 min using 100

• mg of photocatalyst. As expected, the photocatalytic degradation rates increased with the catalyst dosage, which is linked to the concentration of adsorption sites and photocatalytically active sites (k = 0.010, 0.019 and 0.034 min−1 for reactions conducted with 25, 50 and 100 mg of photocatalyst

Dry adhesives from carbon nanofibers grown in an open ethanol flame

• Christian Lutz,
• Julia Syurik,
• C. N. Shyam Kumar,
• Christian Kübel,
• Michael Bruns and
• Hendrik Hölscher

Beilstein J. Nanotechnol. 2017, 8, 2719–2728, doi:10.3762/bjnano.8.271

• range of the utilized type of magnet (<80 °C). In contrast to previous studies, we used NiCl2·6H2O as catalyst with a 60 nm thick copper layer on a silicon wafer. Interestingly, this allows us to run the growth procedure without the usual reduction step in which hydrogen reduces the nickel catalyst into

• -containing salt. The left sample is a clean silicon substrate without catalyst. After 20 s, the ethanol flame went green suggesting that NiCl2·6H2O is transformed to Ni-containing catalysts. Shortly after that, the area initially covered with Ni-containing salt, became black indicating the growth of carbon

• correspond to nickel-containing catalysts, which are still present after growth. Experiments with Si, SiO2 and Cu without Ni-containing salt show no CNF growth. As Ni is the only material that can act as a catalyst to grow CNFs in our process, we conclude that the material observed at the end of the CNFs is

One-step chemical vapor deposition synthesis and supercapacitor performance of nitrogen-doped porous carbon–carbon nanotube hybrids

• Egor V. Lobiak,
• Lyubov G. Bulusheva,
• Ekaterina O. Fedorovskaya,
• Yury V. Shubin,
• Pavel E. Plyusnin,
• Pierre Lonchambon,
• Boris V. Senkovskiy,
• Zinfer R. Ismagilov,
• Emmanuel Flahaut and
• Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 2669–2679, doi:10.3762/bjnano.8.267

• concentration of incorporated nitrogen. The hybrid materials were tested as electrodes in a 1M H2SO4 electrolyte and the best performance was found for a nitrogen-enriched material produced using the Fe/Mo catalyst. From the electrochemical impedance spectroscopy data, it was concluded that the nitrogen doping

• reduces the resistance at the carbon surface/electrolyte interface and the nanotubes permeating the porous carbon provide fast charge transport in the cell. Keywords: bimetallic catalyst; electrochemical impedance spectroscopy; N-doped carbon; porous carbon–carbon nanotube hybrid; supercapacitor

• prepared hybrid materials [6][7][8][9]. Another less common strategy consists of CNT growth by catalytic chemical vapor deposition (CCVD) over catalyst nanoparticles predeposited on the graphitic surfaces [10][11][12][13]. The obtained hybrids are characterized by tight bonding between the components

Localized growth of carbon nanotubes via lithographic fabrication of metallic deposits

• Fan Tu,
• Martin Drost,
• Imre Szenti,
• Janos Kiss,
• Zoltan Kónya and
• Hubertus Marbach

Beilstein J. Nanotechnol. 2017, 8, 2592–2605, doi:10.3762/bjnano.8.260

• storage [1][2][3][4]. The most common synthesis method for CNTs is chemical vapor deposition (CVD) [5][6][7][8], in which statistically distributed, metal-containing particles act as catalysts for CNT growth. Thereby, not only does the random position of the catalyst particles determine the position of

• the CNT, but also the catalyst size, chemical composition and the surface structure has an influence on the growth of the CNTs [9][10][11][12]. Therefore, it is important to fabricate catalysts of controlled size and chemical composition at the desired spatial position in order to fabricate CNTs in

• before and after the CVD process) reveals that the approach was indeed successful. The details of the indicated region depicted in Figure 1e reveals the typical appearance of (multiwalled) CNTs in SEM [35]. The result is striking since each individual EBID Fe deposit acted as a catalyst for the growth of

Fabrication of CeO₂–MO_x (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

• Ling Liu,
• Jingjing Shi,
• Hongxia Cao,
• Ruiyu Wang and
• Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

• solvothermal process, highly dispersed MOx species were decorated on the surface of CeO2 yolk–shell nanospheres to form CeO2–MOx composites. As a CO oxidation catalyst, the CeO2–MOx composite yolk–shell nanospheres showed strikingly higher catalytic activity than naked CeO2 due to the strong synergistic

• conversion as reached at a relatively low temperature of 145 °C over the CeO2–CuOx-2 sample. Furthermore, the CeO2–CuOx catalyst is more active than the CeO2–CoOx and CeO2–NiO catalysts, indicating that the catalytic activity is correlates with the metal oxide. Additionally, this versatile synthesis approach

• ]. Taking the CeO2–CuO catalyst as a typical example, the improved catalytic activity is closely related to the synergistic interaction between copper and ceria, which promotes the exchange of charges between Ce4+/Ce3+ and Cu2+/Cu+ and leads to faster oxidation and reduction than that of the corresponding

Hydrothermal synthesis of ZnO quantum dot/KNb₃O₈ nanosheet photocatalysts for reducing carbon dioxide to methanol

• Xiao Shao,
• Weiyue Xin and
• Xiaohong Yin

Beilstein J. Nanotechnol. 2017, 8, 2264–2270, doi:10.3762/bjnano.8.226

• by reducing CO2 in isopropanol to methanol under UV-light irradiation. Experimental Catalyst synthesis Niobium oxide (Nb2O5, 99.99 wt %) was purchased from Aladdin Industrial Corporation. Potassium hydroxide (KOH, 96 wt %), isopropanol (C3H8O, 99.9 wt %), hydrochloric acid (HCl, 36.5 wt %), zinc

• heated to 200 °C and kept for 48 h, where the precipitate was collected by centrifuging the mixture, then washed with ethanol and deionized water three times, and finally dried at 65 °C for 12 h for further characterization. Catalyst characterization The crystal structure of the synthesized materials

• Raman system using a 325 nm laser. Photocatalytic reaction The photocatalytic reduction of CO2 to methanol was carried out at ambient conditions in a quartz container and batch operated slurry reactor with cooling jacket. 20 mg of the catalyst was added to 20 mL of isopropanol under magnetic stirring

Ester formation at the liquid–solid interface

• Nguyen T. N. Ha,
• Thiruvancheril G. Gopakumar,
• Nguyen D. C. Yen,
• Carola Mende,
• Lars Smykalla,
• Maik Schlesinger,
• Roy Buschbeck,
• Tobias Rüffer,
• Heinrich Lang,
• Michael Mehring and
• Michael Hietschold

Beilstein J. Nanotechnol. 2017, 8, 2139–2150, doi:10.3762/bjnano.8.213

• /bjnano.8.213 Abstract A chemical reaction (esterification) within a molecular monolayer at the liquid–solid interface without any catalyst was studied using ambient scanning tunneling microscopy. The monolayer consisted of a regular array of two species, an organic acid (trimesic acid) and an alcohol

• . Here we present a chemical reaction (esterification) between trimesic acid (benzene-1,3,5-tricarboxylic acid; TMA) dissolved in an alcoholic solvent (undecan-1-ol or decan-1-ol) on a highly oriented pyrolytic graphite (HOPG) (0001) substrate. The reaction proceeds without catalyst and is controlled by

• reaction proceeds typically slow and highly reversible without a catalyst. Dehydrating agents like sulfuric or sulfonic acid [15], or milder ones like dicyclohexylcarbodiimide [17], triphenylphosphane and diazenedicarboxylate [18] are used for esterification from organic acids. In UHV, an on-surface

Synthesis and characterization of noble metal–titania core–shell nanostructures with tunable shell thickness

• Bartosz Bartosewicz,
• Marta Michalska-Domańska,
• Malwina Liszewska,
• Dariusz Zasada and
• Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2017, 8, 2083–2093, doi:10.3762/bjnano.8.208

• coating step of the method described here, being a modification of the titania particle synthesis method described elsewhere [52][53], small volumes of the concentrated aqueous suspensions of synthesized NPs were transferred into a mixture of ethanol and acetonitrile. The hydrolysis reaction catalyst

A systematic study of the controlled generation of crystalline iron oxide nanoparticles on graphene using a chemical etching process

• Peter Krauß,
• Jörg Engstler and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2017, 8, 2017–2025, doi:10.3762/bjnano.8.202

• employing a metal catalyst is a well-established method for synthesizing high-quality single-layer graphene. Yet the main challenge of the CVD process is the required transfer of a graphene layer from the substrate surface onto a chosen target substrate. This process is delicate and can severely degrade the

• -down and bottom-up approaches to synthesize and isolate graphene, each having their own advantages and disadvantages [5][6][7][8][9][10][11][12]. The most common route to synthesize continuous, large-area graphene is chemical vapor deposition (CVD) using a carbon precursor on a planar metal catalyst

• onto various substrates [14][22][23][24]. The transfer of CVD graphene by chemical etching is based on the redox reaction between the metal catalyst and an oxidizing agent in aqueous solution [22][23][25][26][27][28]. As the metal dissolves in the etchant solution, graphene remains floating on the

Synthesis and catalytic application of magnetic Co–Cu nanowires

• Lijuan Sun,
• Xiaoyu Li,
• Zhiqiang Xu,
• Kenan Xie and
• Li Liao

Beilstein J. Nanotechnol. 2017, 8, 1769–1773, doi:10.3762/bjnano.8.178

• easily separated from the reaction mixture. Furthermore, they were applied to the hydrolysis system of ammonia borane as a catalyst for the first time. More importantly, the catalysis results showed that the bimetallic nanowires possessed appealing catalytic performance. Therefore, a rapid and facile

• synthesis method is introduced which is capable of preparing bimetallic Co–Cu nanowires with great potential for industrial applications. Keywords: catalyst; Co–Cu nanowires; liquid phase reduction; magnetic materials; metal replacement; Findings In recent years, many researchers have been devoted to the

• of H2 vs time for the hydrolysis of AB using bimetallic Co–Cu nanowires as a catalyst and the activity in terms of turnover frequency (TOF) [13] was calculated to be 6.17 (mol H2·min−1·(mol Co–Cu)−1). Furthermore, bimetallic Co–Cu nanowires could be separated easily from the catalytic system due to

Effect of the fluorination technique on the surface-fluorination patterning of double-walled carbon nanotubes

• Lyubov G. Bulusheva,
• Yuliya V. Fedoseeva,
• Emmanuel Flahaut,
• Jérémy Rio,
• Christopher P. Ewels,
• Victor O. Koroteev,
• Gregory Van Lier,
• Denis V. Vyalikh and
• Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 1688–1698, doi:10.3762/bjnano.8.169

• understanding of the three fluorination processes. CF4 fluorination is known to give reactive CF3, CF2 and F fragments, which can then bind directly with the surface [44][45]. In contrast F2 fluorination is expected to result in (1,2) ortho- or (1,4) para-addition, depending on the amount of HF catalyst [16

• by catalytic chemical vapor deposition (CCVD) using CH4 (18 mol %) in H2 at 1000 °C and an Mg1−xCoxO solid solution as catalyst [23]. High-resolution transmission electron microscopy (HRTEM) showed that a typical sample consists of ca. 80% DWCNTs, 20% SWCNTs, and a few triple-walled nanotubes. The

Process-specific mechanisms of vertically oriented graphene growth in plasmas

• Subrata Ghosh,
• Shyamal R. Polaki,
• Niranjan Kumar,
• Sankarakumar Amirthapandian,
• Mohamed Kamruddin and
• Kostya (Ken) Ostrikov

Beilstein J. Nanotechnol. 2017, 8, 1658–1670, doi:10.3762/bjnano.8.166

• the effect of the key process parameters such as deposition temperature, discharge power and distance from plasma source to substrate on the catalyst-free growth of VGNs in microwave plasmas. A direct evidence for the initiation of vertical growth through nanoscale graphitic islands is obtained from

• growth. Plasma-enhanced chemical vapor deposition (PECVD) is one of the most suitable techniques for the transfer-free and catalyst-free growth of VGNs at low temperature [15][16][17][18][19][20]. Various research groups reported the growth mechanism of VGNs during PECVD [21][22][23][24]. In brief, the

• morphology and structure of VGNs. In this study, the evolution and mechanism of catalyst-free growth of VGNs on the nanographitic structure is described. The systematic characterization of the morphology and structure was carried out by field-emission scanning electron microscopy (FESEM), high-resolution

Oxidative stabilization of polyacrylonitrile nanofibers and carbon nanofibers containing graphene oxide (GO): a spectroscopic and electrochemical study

• İlknur Gergin,
• Ezgi Ismar and
• A. Sezai Sarac

Beilstein J. Nanotechnol. 2017, 8, 1616–1628, doi:10.3762/bjnano.8.161

• mechanical properties and a potential for a variety of applications; such as supercapacitor applications, battery applications, and catalyst support materials. Polyacrylonitrile (PAN) is one of the well-known precursor for obtaining carbon nanofibers that have a diameter ranging between nanometers and