Chiral nanostructures self-assembled from nitrocinnamic amide amphiphiles: substituent and solvent effects

• Hejin Jiang,
• Huahua Fan,
• Yuqian Jiang,
• Li Zhang and
• Minghua Liu

Beilstein J. Nanotechnol. 2019, 10, 1608–1617, doi:10.3762/bjnano.10.156

• was closely related to the choice of solvent, and the photo-dimerization of the cinnamic amide moiety only occurred for methanol and ethanol. Other solvents could not be shown to induce this kind of transformation. We speculated that methanol or ethanol may affect the hydrogen bonding between the

• amide moieties, which differed from other kinds of solvents. In order to further confirm the specificity of methanol and investigate whether the solvent can cause the helicity inversion, in this study, we explore the self-assembly behavior of three nitrocinnamic amide-containing ʟ-glutamic lipids in

• . Helicity inversion in self-assembly: effect of solvent In addition, the effect of solvent on the 3NCLG self-assembly was also explored. The 3NCLG molecule could readily form transparent gels in DMF and THF when the concentration was above 8 mg/mL, while it formed a precipitate in methanol at the same

Materials nanoarchitectonics at two-dimensional liquid interfaces

• Katsuhiko Ariga,
• Michio Matsumoto,
• Taizo Mori and
• Lok Kumar Shrestha

Beilstein J. Nanotechnol. 2019, 10, 1559–1587, doi:10.3762/bjnano.10.153

• sensitivities in the order of aniline > toluene > benzene > ethanol > hexane > cyclohexane > methanol > water. The obtained nanoporous low-dimensional C60 assemblies provide advantageous features of easy diffusion and promoted π–π interactions for facile sensing. Saran and Curry reported the use of one

Flexible freestanding MoS₂-based composite paper for energy conversion and storage

• Florian Zoller,
• Jan Luxa,
• Thomas Bein,
• Dina Fattakhova-Rohlfing,
• Daniel Bouša and
• Zdeněk Sofer

Beilstein J. Nanotechnol. 2019, 10, 1488–1496, doi:10.3762/bjnano.10.147

• mg of SWCNTs were added to 80 mL of Ar-purged NMP. The suspension was then exfoliated under Ar atmosphere for 2 h at 16,000 rot/min using a high-energy shear-force disperser. After that, the mixture was vacuum-filtered on top of a nylon filter and washed with methanol several times. The use of

• methanol significantly shortens the time necessary for drying. The resulting material was then self-assembled into the form of a paper-like material. After drying under vacuum, the material was directly used. Battery assembly and electrochemical measurements The freestanding MoS2-based composite paper was

Hierarchically structured 3D carbon nanotube electrodes for electrocatalytic applications

• Pei Wang,
• Katarzyna Kulp and
• Michael Bron

Beilstein J. Nanotechnol. 2019, 10, 1475–1487, doi:10.3762/bjnano.10.146

• electrocatalytic applications is demonstrated using the methanol electro-oxidation as a test reaction. The Pt mass specific activity towards methanol oxidation of Pt-CNT/CNT/GC is approximately 2.5 times higher than that of Pt-CNT/GC, and the hierarchical electrode exhibits a more negative onset potential. Both

• structures demonstrate an exceptionally high poisoning tolerance. Keywords: chemical vapor deposition; CNTs; CO stripping; hierarchically structured electrodes; methanol oxidation; platinum; poisoning tolerance; Introduction Carbon nanotubes (CNTs) have attracted considerable attention since their

• ][5][6][7][8]. Besides the above-mentioned applications, CNTs have also been investigated as catalysts or catalyst supports for various electrocatalytic reactions [8][9][10][11][12][13], including methanol oxidation in direct methanol fuel cells (DMFCs). DMFCs are promising power sources for future

Janus-micromotor-based on–off luminescence sensor for active TNT detection

• Ye Yuan,
• Changyong Gao,
• Daolin Wang,
• Chang Zhou,
• Baohua Zhu and
• Qiang He

Beilstein J. Nanotechnol. 2019, 10, 1324–1331, doi:10.3762/bjnano.10.131

• oleic acid (OA, 90%) were obtained from Aladdin Chemistry Co. Ltd. NaOH, NH4F, ethanol, methanol, cyclohexane, trichloromethane, acetonitrile, NaCl, Na2HPO4, and NaH2PO4 were purchased from Tianjin Tianli Chemical Reagent Co. Ltd. Hydrofluoric acid (HF) and hydrogen peroxide (H2O2) were obtained from

A highly efficient porous rod-like Ce-doped ZnO photocatalyst for the degradation of dye contaminants in water

• Binjing Hu,
• Qiang Sun,
• Chengyi Zuo,
• Yunxin Pei,
• Siwei Yang,
• Hui Zheng and
• Fangming Liu

Beilstein J. Nanotechnol. 2019, 10, 1157–1165, doi:10.3762/bjnano.10.115

• to implement the field-only surface integral method used to calculate the electric field on the particle surface. Synthesis of ZnO Zn(OAc)2·2H2O (4.39 g, 0.02 mol) and 2-methylimidazole (6.16 g, 0.075 mol) were dissolved in 150 mL of methanol (MeOH). Then the solution of 2-methylimidazole was poured

Photoactive nanoarchitectures based on clays incorporating TiO₂ and ZnO nanoparticles

• Eduardo Ruiz-Hitzky,
• Pilar Aranda,
• Marwa Akkari,
• Nithima Khaorapapong and
• Makoto Ogawa

Beilstein J. Nanotechnol. 2019, 10, 1140–1156, doi:10.3762/bjnano.10.114

• revealed by TEM (Figure 5A), leads to efficient nanostructured materials for the photocatalytic production of hydrogen tested in methanol photoreforming. Herein, montmorillonite-based nanoarchitectures are less efficient as hydrogen production catalyst than nanoarchitectures derived from sepiolite. Higher

• photodeposition procedure, reprinted with permission from [131], copyright 2015 Elsevier; (B) hydrogen production in methanol photoreforming using this Pt-doped clay nanoarchitecture as catalyst [131]. The structural arrangement of the [Ru(bpy)3]2+–TiO2@clay nanoarchitecture and its photocatalytic activity in the

Serum type and concentration both affect the protein-corona composition of PLGA nanoparticles

• Katrin Partikel,
• Robin Korte,
• Dennis Mulac,
• Hans-Ulrich Humpf and
• Klaus Langer

Beilstein J. Nanotechnol. 2019, 10, 1002–1015, doi:10.3762/bjnano.10.101

• on an OmniPAGE mini system (Omnilab-Laborzentrum GmbH & Co. KG, Bremen, Germany). The resulting gel was fixed (79% water, 1% orthophosphoric acid, 20% methanol), stained with a colloidal Coomassie Brilliant Blue G-250 solution overnight and destained in methanol/water (1:3, v/v). Finally, Gel ix

• equilibrated with 1 mL methanol and 1 mL 1% formic acid before the digestion solutions were applied onto the columns in aliquots of 1 mL. Thereafter, the samples were desalted by washing with 1 mL of purified water. Then, the stationary phase including the peptides was rinsed with 600 µL of Eluent I (MeOH/H2O

Structural and optical properties of penicillamine-protected gold nanocluster fractions separated by sequential size-selective fractionation

• Xiupei Yang,
• Zhengli Yang,
• Fenglin Tang,
• Jing Xu,
• Maoxue Zhang and
• Martin M. F. Choi

Beilstein J. Nanotechnol. 2019, 10, 955–966, doi:10.3762/bjnano.10.96

• materials D-Penicillamine (98%), chloroauric acid (HAuCl4·3H2O, 99.9%) and sodium borohydride (NaBH4, 99%) were purchased from Aldrich (Milwaukee, WI, USA). Acetone (99.5%), 2,5-dihydroxybenzoic acid (DHB, 99%), methanol (MeOH, 99.8%) and ethanol (EtOH, 99.8%) were obtained from Sigma (St. Louis, MO, USA

Synthesis of novel C-doped g-C₃N₄ nanosheets coupled with CdIn₂S₄ for enhanced photocatalytic hydrogen evolution

• Jingshuai Chen,
• Chang-Jie Mao,
• Helin Niu and
• Ji-Ming Song

Beilstein J. Nanotechnol. 2019, 10, 912–921, doi:10.3762/bjnano.10.92

• charges apparently, leading to the enhancement of photocatalytic activity of the hybrid photocatalyst. Photocatalytic performance Time-dependent visible-light-induced photocatalytic H2 formation over different samples has been measured in the presence of methanol (sacrificial electron donor) without the

• are quickly consumed by methanol as the sacrificial electron donor. Accordingly, the bulk recombination rate of the photogenerated carriers is effectively inhibited, further improving the photocatalytic activity for H2 generation. Conclusion In summary, CdIn2S4/C-doped g-C3N4 composite photocatalysts

• tested in a closed circulation reactor system for in situ photocatalytic H2 production (CEL-SPH2N, AuLight, Beijing) at 6 °C and −0.1 MPa. Before the reaction, 40 mg of the photocatalyst was dispersed into 40 mL of aqueous methanol solution (CH3OH/H2O = 1:4 v/v). A 300 W Xe lamp (CEL-HXF300, AuLight

Ultrathin hydrophobic films based on the metal organic framework UiO-66-COOH(Zr)

• Miguel A. Andrés,
• Clemence Sicard,
• Christian Serre,
• Olivier Roubeau and
• Ignacio Gascón

Beilstein J. Nanotechnol. 2019, 10, 654–665, doi:10.3762/bjnano.10.65

• %) was used to prepare UiO-66-COOH(Zr) suspensions. Different concentrations were tested in the range 0.01–0.11 mg MOF·mL−1. Tetrahydrofuran (Sigma-Aldrich, ≥99.9%), ethanol (VWR, >99.8%) and methanol (Sigma-Aldrich, 99.8%) were also used to prepare bare MOF and mixed MOF/surfactant suspensions. The

Mo-doped boron nitride monolayer as a promising single-atom electrocatalyst for CO₂ conversion

• Qianyi Cui,
• Gangqiang Qin,
• Weihua Wang,
• Lixiang Sun,
• Aijun Du and
• Qiao Sun

Beilstein J. Nanotechnol. 2019, 10, 540–548, doi:10.3762/bjnano.10.55

• and commodity chemicals [6]. For example, CO2 can be converted to methane, methanol and formic acid, and all of which can be used as energy sources and chemical materials at the global scale [7][8][9][10][11]. In this sense, the CO2 reduction reaction (CRR) by electrochemical methods is promising

Reduced graphene oxide supported C₃N₄ nanoflakes and quantum dots as metal-free catalysts for visible light assisted CO₂ reduction

• Md Rakibuddin and
• Haekyoung Kim

Beilstein J. Nanotechnol. 2019, 10, 448–458, doi:10.3762/bjnano.10.44

• spectrum shows a major peak related to HCHO and a minor peak for trace amounts of methanol, and no other peaks are found (Supporting Information File 1, Figure S8a), confirming the successful reduction of CO2 to HCHO. Three sets of control experiments were also conducted, and an isotopic experiment to

Development of an anti-pollution coating process technology for the application of an on-site PV module

• Sejin Jung,
• Wonseok Choi,
• Jung Hyun Kim and
• Jang Myoun Ko

Beilstein J. Nanotechnol. 2019, 10, 332–336, doi:10.3762/bjnano.10.32

• coat various materials, such as metals, ceramics, and glass [9]. Before coating the glass slide substrates, the substrates were subjected to ultrasonic cleaning for 10 min in, consecutively, trichloroethylene, acetone, methanol and deionized water (DI water). The substrates were coated with the coating

Removal of toxic heavy metals from river water samples using a porous silica surface modified with a new β-ketoenolic host

• Said Tighadouini,
• Smaail Radi,
• Abderrahman Elidrissi,
• Khadija Haboubi,
• Maryse Bacquet,
• Stéphanie Degoutin,
• Mustapha Zaghrioui and
• Yann Garcia

Beilstein J. Nanotechnol. 2019, 10, 262–273, doi:10.3762/bjnano.10.25

• procedure [37]. Pyridine-enol-imine-furan-substituted silica (SiNL). After having refluxed 5 g of SiNH2 with L1 in dry methanol (50 mL) for 24 h, the resulting hybrid was filtered, and Soxhlet was extracted with several organic solvents for 12 h and finally dried at 70 °C for 24 h. The material was

Thermal control of the defunctionalization of supported Au₂₅(glutathione)₁₈ catalysts for benzyl alcohol oxidation

• Zahraa Shahin,
• Hyewon Ji,
• Rodica Chiriac,
• Nadine Essayem,
• Franck Rataboul and
• Aude Demessence

Beilstein J. Nanotechnol. 2019, 10, 228–237, doi:10.3762/bjnano.10.21

• dodecane (≥99%) were purchased from Sigma-Aldrich. L-glutathione (HSG, +98%) and cesium carbonate (99%, metal basis) were obtained from Alfa Aesar, Methanol (HPLC grade) from VWR International, and toluene from Emsure. Zirconium oxide (ZrO2) was prepared from Zr(OH)4 calcined at 550 °C for 12 hours under

• synthesis procedure with some modifications [33]. In a 100 mL round-bottom flask, 0.25 mmol HAuCl4.3H2O was dissolved in 50 mL methanol under stirring at 1500 rpm in an ice bath. Then, 1 mmol glutathione was rapidly added to the flask, and the mixed solution was left stirring for 30 minutes. The color of

• reaction was allowed to proceed under stirring at 1500 rpm in an ice bath for 1 hour, and UV–vis spectra were collected at 45 minutes into the reaction. The product was purified by repeated centrifugation (10000 rpm, 15 minutes) and was washed several times with methanol (5000 rpm, 15 minutes). The

Uniform Sb₂S₃ optical coatings by chemical spray method

• Jako S. Eensalu,
• Atanas Katerski,
• Erki Kärber,
• Ilona Oja Acik,
• Arvo Mere and
• Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 198–210, doi:10.3762/bjnano.10.18

• substrates were rinsed with deionized water, methanol (99.9 vol %), deionized water, dipped in aqueous room temperature H2SO4 (1 vol %), rinsed again with deionized water, and dried at 105 °C in air. TiO2 was prepared by methods used in our previous papers [7][12]. The TiO2 film thickness was ≈80 nm based on

Wet chemistry route for the decoration of carbon nanotubes with iron oxide nanoparticles for gas sensing

• Hussam M. Elnabawy,
• Juan Casanova-Chafer,
• Badawi Anis,
• Mostafa Fedawy,
• Mattia Scardamaglia,
• Carla Bittencourt,
• Ahmed S. G. Khalil,
• Eduard Llobet and
• Xavier Vilanova

Beilstein J. Nanotechnol. 2019, 10, 105–118, doi:10.3762/bjnano.10.10

• %) Sulfuric acid, J. T. Baker (H2SO4 95–97%) Conductive silver paste, Sigma-Aldrich Methanol, Scharlau (CH3OH 99.9%) Ethanol, Scharlau (C2H5OH 96% extra pure and 99.5% absolute) Acetone, Scharlau (C3H6O 99.5%) Dimethylformamide (DMF), Alfa Aesar (C3H7NO 99.8%) Iron(III) nitrate nonahydrate, Sigma-Aldrich (Fe

• drying oven at 80 °C for 4 hours. For the decoration of carbon nanotubes, iron(III) nitrate nonahydrate was used as the iron precursor. 50 mg of the acidic-activated carbon nanotubes were added to 50 mL of solvent together with a corresponding amount of Fe(NO3)3·9H2O salt. Different solvents, methanol

• solvent on the nanoparticle distribution, solutions with the four solvents considered (ethanol, methanol, acetone and DMF) were prepared using a 1:1.5 proportion in weight between carbon nanotubes and iron(III) nitrate nonahydrate and calcined for 30 minutes. TEM images of the results are summarized in

Zn/F-doped tin oxide nanoparticles synthesized by laser pyrolysis: structural and optical properties

• Florian Dumitrache,
• Iuliana P. Morjan,
• Elena Dutu,
• Ion Morjan,
• Claudiu Teodor Fleaca,
• Monica Scarisoreanu,
• Alina Ilie,
• Marius Dumitru,
• Cristian Mihailescu,
• Adriana Smarandache and
• Gabriel Prodan

Beilstein J. Nanotechnol. 2019, 10, 9–21, doi:10.3762/bjnano.10.2

• ], photocatalysts for rhodamine 6G dye degradation in aqueous solution [27] and were proposed as a thermal UV sensor for high-radiation environments [4]. Moreover, the ZTO materials were also employed as volatile organic compound (VOC) (such as methanol, ethanol or acetone vapors) sensors [28], as an anode for Li

A novel polyhedral oligomeric silsesquioxane-modified layered double hydroxide: preparation, characterization and properties

• Xianwei Zhang,
• Zhongzhu Ma,
• Hong Fan,
• Carla Bittencourt,
• Jintao Wan and
• Philippe Dubois

Beilstein J. Nanotechnol. 2018, 9, 3053–3068, doi:10.3762/bjnano.9.284

• for applications in LDH-based materials. Experimental Materials All chemicals were of analytical grade and used as received without further purification unless otherwise noted. (3-Aminopropyl)triethoxysilane and succinic anhydride were purchased from Aladdin Co. Ltd (Shanghai, China). Methanol

• stirrer, (3-aminopropyl)triethoxysilane (30 mL), methanol (720 mL) and concentrated hydrochloric acid (60 mL) were added. The system was refluxed for 20 h under vigorous stirring and then cooled down to room temperature. The white precipitate was collected after precipitation in cold THF, filtration, and

• washing with cold methanol. The residue was then recrystallized in methanol, filtrated, and dried in vacuum (40 °C, 24 h). The final product was obtained as a white powder with a yield of 43%. The synthesis of octa-substituted carboxy-terminated POSS (OCPS) was carried out via acylation of OAPS with

Comparative biological effects of spherical noble metal nanoparticles (Rh, Pd, Ag, Pt, Au) with 4–8 nm diameter

• Alexander Rostek,
• Marina Breisch,
• Kevin Pappert,
• Kateryna Loza,
• Marc Heggen,
• Manfred Köller,
• Christina Sengstock and
• Matthias Epple

Beilstein J. Nanotechnol. 2018, 9, 2763–2774, doi:10.3762/bjnano.9.258

• of different size and shape [61][62]. A hydrogen-based reduction in alcohols like methanol, heptanol, and propanol leads to sponge-like rhodium nanostructures [63]. Palladium nanoparticles can be synthesized either by the polyol process or by sono-, electro- and wet-chemical methods [64]. The

Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

• Jesús A. Díaz-Real,
• Geyla C. Dubed-Bandomo,
• Juan Galindo-de-la-Rosa,
• Luis G. Arriaga,
• Janet Ledesma-García and
• Nicolas Alonso-Vante

Beilstein J. Nanotechnol. 2018, 9, 2628–2643, doi:10.3762/bjnano.9.244

• potential when molecular species are present. To evaluate the oxidative contribution of the photogenerated holes, methanol (MeOH) was added to the electrolyte. From Figure 6c it can be seen that the addition of 0.5 M MeOH increases the photocurrent jph up to 200% (Figure 6a). This refers to a phenomenon

Cytotoxicity of doxorubicin-conjugated poly[N-(2-hydroxypropyl)methacrylamide]-modified γ-Fe₂O₃ nanoparticles towards human tumor cells

• Zdeněk Plichta,
• Yulia Kozak,
• Rostyslav Panchuk,
• Viktoria Sokolova,
• Matthias Epple,
• Lesya Kobylinska,
• Pavla Jendelová and
• Daniel Horák

Beilstein J. Nanotechnol. 2018, 9, 2533–2545, doi:10.3762/bjnano.9.236

• and under Ar atmosphere. Methanol (3 mL) was added to transform unreacted methacryloyl chloride in methyl methacrylate and the mixture was stirred until reaching room temperature (RT). Precipitated triethylamine·HCl was filtered-off, DCE removed on a rotary evaporator, and the resulting MMAA was

• )-NH-NH2 was diluted with ethanol (2 mL)/tetrahydrofuran (4 mL) mixture and precipitated in diethyl ether (10 mL) and dried. Finally, to attach Dox, P(HPMA-MMAA)-NH-NH2 (40 mg) was dissolved in methanol (0.3 mL), a solution of Dox (3.9 mg) in methanol (1 mL) and 0.5 M methanolic acetic acid (25 µL) was

• vibrations, respectively (Figure 3). The methoxy groups of the P(HPMA-MMAA) chains were reacted with hydrazine hydrate (Figure 2) under a rather low molar excess of hydrazine relative to MMAA in order to facilitate purification of the product. Finally, P(HPMA-MMAA)-NH-NH2 was conjugated with Dox in methanol

Nanocellulose: Recent advances and its prospects in environmental remediation

• Katrina Pui Yee Shak,
• Yean Ling Pang and
• Shee Keat Mah

Beilstein J. Nanotechnol. 2018, 9, 2479–2498, doi:10.3762/bjnano.9.232

• particles will be lost during the recycling process. In another study, Taranto et al. [126] found that cellulose was sensitive to UV irradiation and prone to degradation during photocatalysis. The cellulose might compete with organic pollutants such as methanol for photocatalytically generated active

• species/sites, leading to a decrease in methanol reaction rate. Besides, Puls et al. [127] clarified that TiO2 could cause pitting on the surface of cellulose acetate/cellulose pulp fibres under UV illumination. Therefore, cellulose nanomaterials need to be coated and covered perfectly by inert UV

Effect of electrospinning process variables on the size of polymer fibers and bead-on-string structures established with a 2³ factorial design

• Paulina Korycka,
• Adam Mirek,
• Katarzyna Kramek-Romanowska,
• Marcin Grzeczkowicz and
• Dorota Lewińska

Beilstein J. Nanotechnol. 2018, 9, 2466–2478, doi:10.3762/bjnano.9.231

• in terms of the fiber surface morphology. It was also concluded that methanol and ethanol were best suited for electrospinning of PVP, in contrast to water and dimethylformamide (DMF), which prevented the polymer from spinning. What is more, the higher the water content of the solvent, the less