Porous silver-coated pNIPAM-co-AAc hydrogel nanocapsules

• William W. Bryan,
• Riddhiman Medhi,
• Maria D. Marquez,
• Supparesk Rittikulsittichai,
• Michael Tran and
• T. Randall Lee

Beilstein J. Nanotechnol. 2019, 10, 1973–1982, doi:10.3762/bjnano.10.194

• glassware and equipment used were first cleaned using aqua regia (3:1, HCl/HNO3), then cleaned in a base bath (saturated KOH in isopropyl alcohol) and lastly, rinsed with Milli-Q water prior to use. Preparation of pNIPAM-co-AAc hydrogel particles. Colloidal pNIPAM-co-AAc hydrogel particles were prepared

Magnetic properties of biofunctionalized iron oxide nanoparticles as magnetic resonance imaging contrast agents

• Natalia E. Gervits,
• Andrey A. Gippius,
• Alexey V. Tkachev,
• Evgeniy I. Demikhov,
• Sergey S. Starchikov,
• Igor S. Lyubutin,
• Alexander L. Vasiliev,
• Vladimir P. Chekhonin,
• Maxim A. Abakumov,
• Alevtina S. Semkina and
• Alexander G. Mazhuga

Beilstein J. Nanotechnol. 2019, 10, 1964–1972, doi:10.3762/bjnano.10.193

• (III) acetylacetonate. Briefly, the solution of iron(III) acetylacetonate (2 g) in anhydrous benzyl alcohol (40 mL) was heated to 110 °С for 1 h. Afterwards, the solution was heated to reflux under nitrogen atmosphere and kept for 30 min under reflux. Subsequently, the solution was cooled down, and the

Facile synthesis of carbon nanotube-supported NiO//Fe₂O₃ for all-solid-state supercapacitors

• Shengming Zhang,
• Xuhui Wang,
• Yan Li,
• Xuemei Mu,
• Yaxiong Zhang,
• Jingwei Du,
• Guo Liu,
• Xiaohui Hua,
• Yingzhuo Sheng,
• Erqing Xie and
• Zhenxing Zhang

Beilstein J. Nanotechnol. 2019, 10, 1923–1932, doi:10.3762/bjnano.10.188

• . All-solid-state asymmetric supercapacitor An all-solid-state asymmetric supercapacitor (ASC) was constructed with CC-CNT@Fe2O3 as the negative electrode, CC-CNT@NiO as the positive electrode, potassium hydroxide/polyvinyl alcohol gel (KOH/PVA, 1:1 mass ratio) as the electrolyte, and a cellulose

Biocatalytic oligomerization-induced self-assembly of crystalline cellulose oligomers into nanoribbon networks assisted by organic solvents

• Yuuki Hata,
• Yuka Fukaya,
• Toshiki Sawada,
• Masahito Nishiura and
• Takeshi Serizawa

Beilstein J. Nanotechnol. 2019, 10, 1778–1788, doi:10.3762/bjnano.10.173

• , 60, 70, 80 and 90 vol % EtOH, EtOH, EtOH/tert-butyl alcohol (1:1, v/v) and then tert-butyl alcohol by immersion. The obtained organogels were freeze-fractured using liquid nitrogen and a razor blade and then lyophilized. The obtained xerogels were mounted on substrates using Dotite and then coated

Growth dynamics and light scattering of gold nanoparticles in situ synthesized at high concentration in thin polymer films

• Corentin Guyot,
• Philippe Vandestrick,
• Ingrid Marenne,
• Olivier Deparis and
• Michel Voué

Beilstein J. Nanotechnol. 2019, 10, 1768–1777, doi:10.3762/bjnano.10.172

• components as a reducing agent for the metal salt. We therefore need a matrix that plays the role of reducing agent but also contributes to the stabilization of the NPs. Polymers like poly(vinylpyrrolidone) (PVP) or polyvinyl alcohol (PVA) are good candidates for this purpose. The self-stabilization process

• refractive index. Our observation that the in situ synthesis of NPs produces some roughness at the film surface and hence backscattering, is of importance for the integration of such Au nanocomposite films in Q-switched fiber lasers. Experimental Chemicals HAuCl4 and poly(vinyl alcohol) (PVA, 87–89

TiO₂/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries

• Ning Liu,
• Lu Wang,
• Taizhe Tan,
• Yan Zhao and
• Yongguang Zhang

Beilstein J. Nanotechnol. 2019, 10, 1726–1736, doi:10.3762/bjnano.10.168

• (DI) water (18.2 MΩ cm) and ethyl alcohol. Then, the powder was vacuum dried (−0.08 MPa) for 8 h. To synthesize the TiO2/GO composites, 1 g of nanoporous TiO2 (≈40 nm) and 100 mL of graphene oxide (GO) solution were dispersed into 100 mL of deionized water and ultrasonically mixed for 2 h, followed by

Novel hollow titanium dioxide nanospheres with antimicrobial activity against resistant bacteria

• Carol López de Dicastillo,
• Cristian Patiño,
• María José Galotto,
• Yesseny Vásquez-Martínez,
• Claudia Torrent,
• Daniela Alburquenque,
• Alejandro Pereira and
• Juan Escrig

Beilstein J. Nanotechnol. 2019, 10, 1716–1725, doi:10.3762/bjnano.10.167

• were (0.16 ± 0.02)% and (23.41 ± 0.47)% with respect to the polymer weight, respectively. The deposition of titania, when compared to our previous work, confirmed that the deposition onto the PVP polymer and polyvinyl alcohol presented a similar rate and it was mainly dependent on the number of cycles

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

• at the liquid–liquid interface. For example, C60 rods or needles can be obtained at the interface between a saturated solution of C60 in toluene and isopropyl alcohol as poor solvent. 4.2 One-dimensional fullerene assembly materials Shrestha and co-workers have extended the research on dimensionally

• -dimensional C60 crystals prepared through liquid–liquid interfacial precipitation between m-xylene and isopropyl alcohol for visible-spectrum photodetectors [248]. Additional materials or two metal contacts are not necessary in the fabricated photodetectors. These devices made solely from carbon can be used

• prepared two-dimensional C60 hexagonal nanosheets with hierarchic pore structures of macropores and mesopores just by changing the solvent combination (Figure 18) [250]. Liquid–liquid interfacial precipitation processes with isopropyl alcohol/benzene and isopropyl alcohol/carbon tetrachloride provided one

Synthesis of P- and N-doped carbon catalysts for the oxygen reduction reaction via controlled phosphoric acid treatment of folic acid

• Rieko Kobayashi,
• Takafumi Ishii,
• Yasuo Imashiro and
• Jun-ichi Ozaki

Beilstein J. Nanotechnol. 2019, 10, 1497–1510, doi:10.3762/bjnano.10.148

• exhibited higher ORR activity than N-doped (HH-series) carbon materials. As N-free P-doped carbon materials could not be prepared from FA, a P-doped carbon material was prepared from poly(furyl alcohol) (PFA) to examine the effects of P-only doping on the ORR activity. The ORR activity of P-doped PFA

• specimens, respectively (T = treatment temperature). Moreover, carbon materials were also prepared by directly heating FA or PA-FA mixtures to 1000 °C (H-1000 and P-1000 samples, respectively). To study the influence of P-only doping, the above carbonization procedure was applied to poly(furfuryl alcohol

Direct observation of oxygen-vacancy formation and structural changes in Bi₂WO₆ nanoflakes induced by electron irradiation

• Hong-long Shi,
• Bin Zou,
• Zi-an Li,
• Min-ting Luo and
• Wen-zhong Wang

Beilstein J. Nanotechnol. 2019, 10, 1434–1442, doi:10.3762/bjnano.10.141

• = 5.4063(4) Å, b = 16.4186(0) Å, and c = 5.4319(7) Å. An extraordinary strong (200) reflection in the SAED pattern indicates the strong preferred orientation of the flake-like nanocrystallites. This effect is further enhanced in TEM experiments because the ultrasonic treatment in absolute ethyl alcohol

Multicomponent bionanocomposites based on clay nanoarchitectures for electrochemical devices

• Giulia Lo Dico,
• Bernd Wicklein,
• Lorenzo Lisuzzo,
• Giuseppe Lazzara,
• Pilar Aranda and
• Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2019, 10, 1303–1315, doi:10.3762/bjnano.10.129

• , MWCNTs and poly(vinyl alcohol) [25], sepiolite, graphene nanoplatelets, and biopolymers (e.g., alginate, gelatine) [26] and cellulose or foams of microfibrillated cellulose and starch [47], which exhibit Young’s moduli in the range from 0.1 to 9 GPa. The high stiffness of these materials has been

• conductivity values, i.e., 2700 S·m−1 for alginate, 900 S·m−1 for gelatin, and 300 S·m−1 for poly(vinyl alcohol), and the chitosan matrix discussed here yielded conductivity of 2900 S·m−1 [26]. The increase of the conductivity in chitosan films can tentatively be ascribed to the presence of physically adsorbed

Alloyed Pt₃M (M = Co, Ni) nanoparticles supported on S- and N-doped carbon nanotubes for the oxygen reduction reaction

• Stéphane Louisia,
• Yohann R. J. Thomas,
• Pierre Lecante,
• Marie Heitzmann,
• M. Rosa Axet,
• Pierre-André Jacques and
• Philippe Serp

Beilstein J. Nanotechnol. 2019, 10, 1251–1269, doi:10.3762/bjnano.10.125

• alcohol) (80/19.5/0.5), and sonicated for 30 min. 30 µL of the prepared ink was deposited three times onto the polished glassy carbon disk electrode. A thin catalytic layer with a Pt loading of 100 µgPt/cm2 was obtained after evaporation of the solvent under air at room temperature. The electroactive

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

• , when exposed to UV light [117]. Other alternative approaches include the direct precipitation of the ZnO from Zn salts in presence of bentonite dispersed in ethanol [124] or the association of ZnO NPs with Laponite® using poly(vinyl alcohol) as binder agent [125]. In both cases, the resulting materials

Synthesis and characterization of quaternary La(Sr)S–TaS₂ misfit-layered nanotubes

• Marco Serra,
• Erumpukuthickal Ashokkumar Anumol,
• Dalit Stolovas,
• Iddo Pinkas,
• Ernesto Joselevich,
• Reshef Tenne,
• Andrey Enyashin and
• Francis Leonard Deepak

Beilstein J. Nanotechnol. 2019, 10, 1112–1124, doi:10.3762/bjnano.10.111

• spectroscopy (EDX) was performed using a SuperX EDX detector attached to this microscope using Bruker Esprit software. The quantification was done using the Cliff–Lorimer method. The samples for electron microscopy were prepared by dispersing the synthesized powder in ethyl alcohol, followed by ultrasonication

Glucose-derived carbon materials with tailored properties as electrocatalysts for the oxygen reduction reaction

• Rafael Gomes Morais,
• Natalia Rey-Raap,
• José Luís Figueiredo and
• Manuel Fernando Ribeiro Pereira

Beilstein J. Nanotechnol. 2019, 10, 1089–1102, doi:10.3762/bjnano.10.109

• binding energy: i) carbon sp2 (C=C, peak I) at 284.6 ± 0.1 eV; ii) carbon in phenol, alcohol, ether bonds (C–O, peak II) at 285.8 ± 0.2 eV; iii) carbonyl or quinone groups (C=O, peak III) at 287.2 ± 0.2 eV; iv) carboxyl groups (COOH, peak IV) at 288.9 eV ± 0.3; and v) the shake-up satellite due to π–π

Correlation of surface-enhanced Raman scattering (SERS) with the surface density of gold nanoparticles: evaluation of the critical number of SERS tags for a detectable signal

• Vincenzo Amendola

Beilstein J. Nanotechnol. 2019, 10, 1016–1023, doi:10.3762/bjnano.10.102

• samples for TEM analysis were obtained by mixing the AuNT solution (0.2 mg/mL in Au) 1:5 with a 10 mg/mL aqueous solution of polyvinyl alcohol (PVA, 200,000 Mw, on average, from Fluka) and depositing one drop on a copper grid coated with a holey carbon film, according to a well-established procedure which

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

• protein corona as a function of increasing serum concentration. Therefore, we produced NPs composed of the biodegradable polymer PLGA stabilized with poly(vinyl alcohol) (PVA) and subsequently incubated them with increasing amounts of either fetal bovine serum (FBS) or human serum to induce the formation

• of the protein corona with increasing serum concentration Nanoparticles (NPs) of the present study are based on the biodegradable polymer PLGA stabilized with poly(vinyl alcohol) (PVA) and were prepared by an emulsion diffusion method [19]. Incorporation of Lumogen® Red led to fluorescent labeled NPs

• Reagents The biodegradable polymer poly(DL-lactide-co-glycolide) (PLGA, Resomer® RG 502 H), which was used as NP matrix, was obtained from Evonik Industries (Darmstadt, Germany). The steric NP stabilizer poly(vinyl alcohol) (PVA; Emprove® exp 8-88, molecular weight approx. 67,000 g/mol, degree of

In situ AFM visualization of Li–O₂ battery discharge products during redox cycling in an atmospherically controlled sample cell

• Kumar Virwani,
• Younes Ansari,
• Khanh Nguyen,
• Francisco José Alía Moreno-Ortiz,
• Jangwoo Kim,
• Maxwell J. Giammona,
• Ho-Cheol Kim and
• Young-Hye La

Beilstein J. Nanotechnol. 2019, 10, 930–940, doi:10.3762/bjnano.10.94

• 1 ppm [42]. Glassy carbon was laser cut into 12 mm diameter discs. The surface of the glassy carbon was polished [43] to an average root-mean-square roughness of less than 10 nm. Upon polishing, the glassy carbon was cleaned with isopropyl alcohol and deionized water and further dried in a vacuum

Novel reversibly switchable wettability of superhydrophobic–superhydrophilic surfaces induced by charge injection and heating

• Xiangdong Ye,
• Junwen Hou and
• Dongbao Cai

Beilstein J. Nanotechnol. 2019, 10, 840–847, doi:10.3762/bjnano.10.84

• Materials and instrumentation Alcohol (99.7%, AR) and hydrophobic silica (16–25 nm diameter) was provided by Evonik Degussa Co. Ltd. (Germany). The varnish (Voep-1) was from Shijiazhuang Paint Company. All reagents were used as received without further purification. A high-voltage power supply (Tianjin

• temperature, 5 µL of deionized water was absorbed by a 5 µL needle tube and dripped vertically on the surface of the sample. The final contact angle of the sample surface was the average value of five points on the sample. Coating preparation 0.2 g of SiO2 was slowly dispersed in 10 mL of alcohol and

• sonicated for 30 min. 1 mL varnish was added to a mixed solution of SiO2/alcohol and magnetically stirred for 30 min. The final coating solution was sprayed onto glass slides and cured at room temperature for 2 h (spraying distance 20 cm, spraying time 3 s). Experiment setup For studying the effect of the

An iridescent film of porous anodic aluminum oxide with alternatingly electrodeposited Cu and SiO₂ nanoparticles

• Menglei Chang,
• Huawen Hu,
• Haiyan Quan,
• Hongyang Wei,
• Zhangyi Xiong,
• Jiacong Lu,
• Pin Luo,
• Yaoheng Liang,
• Jianzhen Ou and
• Dongchu Chen

Beilstein J. Nanotechnol. 2019, 10, 735–745, doi:10.3762/bjnano.10.73

• finally put into a sealed pocket for later use. The SiO2 deposition liquid was prepared by mechanically mixing potassium nitrate (10.11 g), DI water (500 mL), absolute ethyl alcohol (500 mL), adding tetraethoxysilane (50 mL) after the pH value was adjusted to 3. The flow chart for the stepwise galvanic

Gold nanoparticles embedded in a polymer as a 3D-printable dichroic nanocomposite material

• Lars Kool,
• Anton Bunschoten,
• Aldrik H. Velders and
• Vittorio Saggiomo

Beilstein J. Nanotechnol. 2019, 10, 442–447, doi:10.3762/bjnano.10.43

• standard off-the-shelf fused deposition modeling (FDM) 3D printer. We chose to use polyvinyl alcohol (PVA) as the nanoparticle carrier, because it is one of the most used 3D printing materials, it is water soluble, thus mixable with the AuNPs without the need to change solvents, and because it is known

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

• des Multimatériaux et Interfaces (LMI), Villeurbanne, France 10.3762/bjnano.10.21 Abstract Au25(SG)18 (SG – glutathione) clusters deposited on ZrO2 nanoparticles have been used as a catalyst for benzyl alcohol oxidation. Calcination was performed at different temperatures to study the ligand and

• particle size effect on the catalytic activity. In contrast to most gold nanoclusters which have to be completely defunctionalized for maximum catalytic activity, the partially defunctionalized Au25(SG)18@ZrO2 catalyst, thermally treated at 300 °C, exhibits full conversion of benzyl alcohol within 15 h

• under atmospheric pressure with 94% selectivity towards benzaldehyde. Keywords: benzyl alcohol oxidation; glutathione; gold nanoclusters; partial defunctionalization; supported catalyst; zirconium oxide nanoparticles; Introduction Since Haruta’s discovery of the catalytic activity of gold

Nanoporous water oxidation electrodes with a low loading of laser-deposited Ru/C exhibit enhanced corrosion stability

• Sandra Haschke,
• Dmitrii Pankin,
• Vladimir Mikhailovskii,
• Maïssa K. S. Barr,
• Adriana Both-Engel,
• Alina Manshina and
• Julien Bachmann

Beilstein J. Nanotechnol. 2019, 10, 157–167, doi:10.3762/bjnano.10.15

• nanoparticles [18][28]. A carbonaceous support has also been used, with the advantages of chemical durability and electrical conductivity, as demonstrated in the context of alcohol dehydrogenation [29][30]. Such a support, however, has not been applied to the water oxidation reaction so far. In this paper, we

Pull-off and friction forces of micropatterned elastomers on soft substrates: the effects of pattern length scale and stiffness

• Peter van Assenbergh,
• Marike Fokker,
• Julian Langowski,
• Jan van Esch,
• Marleen Kamperman and
• Dimitra Dodou

Beilstein J. Nanotechnol. 2019, 10, 79–94, doi:10.3762/bjnano.10.8

• degrees (Young’s moduli of 280 and 580 kPa) were fabricated from poly(dimethylsiloxane) (PDMS) and tested on soft poly(vinyl alcohol) (PVA) substrates of two stiffness degrees (12 and 18 kPa), and on hard glass substrates as a reference. An out-of-the-cleanroom colloidal lithographic approach was

• order to also fabricate dimple arrays topped with a thin terminal layer. The pull-off and friction forces of these micropatterns were tested on soft substrates made of poly(vinyl alcohol) (PVA) with two stiffness degrees and compared with the corresponding performance on glass as reference. Results

• -polymer (base) and crosslinker (curing agent) were purchased from Dow Corning, poly(vinyl alcohol) (PVA, Selvol PVOH 165; hydrolysis rate: 99.65% ± 0.35%; degree of polymerization: about 2000, as reported by the manufacturer) was purchased from Sekisui Chemical Group. N-methyl-2-pyrrolidone (NMP) was

Near-infrared light harvesting of upconverting NaYF₄:Yb³⁺/Er³⁺-based amorphous silicon solar cells investigated by an optical filter

• Daiming Liu,
• Qingkang Wang and
• Qing Wang

Beilstein J. Nanotechnol. 2018, 9, 2788–2793, doi:10.3762/bjnano.9.260

• scattering. Our results explicitly demonstrated the feasibility of UC in NIR light harvesting for a-Si:H solar cells. Experimental The NaYF4:Yb3+/Er3+ was prepared via a hydrothermal method based on a alcohol/water/oleic acid system [21]. Lanthanide chloride hexahydrate (RECl3·6H2O, RE = Y, Yb and Er; 99.99