Hierarchical coassembly of DNA–triptycene hybrid molecular building blocks and zinc protoporphyrin IX

• Rina Kumari,
• Sumit Singh,
• Mohan Monisha,
• Sourav Bhowmick,
• Anindya Roy,
• Neeladri Das and
• Prolay Das

Beilstein J. Nanotechnol. 2016, 7, 697–707, doi:10.3762/bjnano.7.62

• block of the nanofibers. A notable change in photocatalytic efficiency of Zn PpIX was observed when it was inside the TPA–DNA scaffold. The significant increase in ROS generation by Zn PpIX when trapped in this biocompatible DNA–TPA hybrid nanofiber may be an effective tool to explore photodynamic

• constant for all the measurements. The percentage of enhancement in degree of oxidation (% EDO) of DHR 123 in the presence of DNA–TPA Zn PpIX nanofiber at λmax = 500 nm and λem = 534 nm was determined by using the equation as follows: where I0 is the absorption or the fluorescent intensity of oxidized DHR

• 123 by free Zn PpIX, and I is the fluorescent or absorption intensity in the presence of DNA–Zn PpIX and DNA–Zn PpIX nanofiber upon 2 min UV irradiation. Computational study In order to resolve the formation of higher ordered structures from assemblies of triconjugated DNA–TPA system, we conducted

Novel roles for well-known players: from tobacco mosaic virus pests to enzymatically active assemblies

• Claudia Koch,
• Fabian J. Eber,
• Carlos Azucena,
• Alexander Förste,
• Stefan Walheim,
• Thomas Schimmel,
• Alexander M. Bittner,
• Holger Jeske,
• Hartmut Gliemann,
• Sabine Eiben,
• Fania C. Geiger and
• Christina Wege

Beilstein J. Nanotechnol. 2016, 7, 613–629, doi:10.3762/bjnano.7.54

• addressable coupling sites exposed on their outer and sometimes inner surfaces, they offer intriguing possibilities for use as nanocontainers for the encapsidation or fabrication of compounds, or as nanofiber scaffolds for the immobilization and presentation of functional units. Most of the novel approaches

Nanofibers for drug delivery – incorporation and release of model molecules, influence of molecular weight and polymer structure

• Jakub Hrib,
• Jakub Sirc,
• Radka Hobzova,
• Zuzana Hampejsova,
• Zuzana Bosakova,
• Marcela Munzarova and
• Jiri Michalek

Beilstein J. Nanotechnol. 2015, 6, 1939–1945, doi:10.3762/bjnano.6.198

• these applications [8]. Although several methods of nanofiber preparation have been invented [9], electrospinning technique can be considered as a simple and versatile method for the production of continuous polymeric nanofibrous mats formed of nano- to micro-sized fibers [10][11][12][13][14]. Moreover

• , elemental analysis, IR spectroscopy and melting point measurements. The needle-free electrospinning process was optimized for each type of nanofiber with respect to the different physicochemical properties of polymers. SEM images revealed that the textures of all resultant samples were homogenous and free

• not noticeably influence the nanofiber structure. According to the results of morphological characterization, the nanofibrous structures remained similar to those of nanofibers without model molecules, even for nanofibers that contained PEG 20 (Figure 2d–f). Clusters or other artifacts were not

Tunable white light emission by variation of composition and defects of electrospun Al₂O₃–SiO₂ nanofibers

• Jinyuan Zhou,
• Gengzhi Sun,
• Hao Zhao,
• Xiaojun Pan,
• Zhenxing Zhang,
• Yujun Fu,
• Yanzhe Mao and
• Erqing Xie

Beilstein J. Nanotechnol. 2015, 6, 313–320, doi:10.3762/bjnano.6.29

• . Strong light emission was observed from the Al2O3–SiO2 hetero-nanofibers with tunable emission from bluish-white to yellow-white. The possible origins of each PL band in this composite nanofiber were also discussed. Results and Discussion Crystalline structures Figure 1 shows the XRD patterns of the

• Figure 2d and Figure 2e, respectively) results in the coarsening of the surface of the fiber, further implying the precipitation of mullite nanocrystals from the inside to the surface of the fibers during the calcination. Comparably, the pure SiO2 nanofiber has a diameter of ≈100 nm with smooth surface

Boosting the local anodic oxidation of silicon through carbon nanofiber atomic force microscopy probes

• Gemma Rius,
• Matteo Lorenzoni,
• Soichiro Matsui,
• Masaki Tanemura and
• Francesc Perez-Murano

Beilstein J. Nanotechnol. 2015, 6, 215–222, doi:10.3762/bjnano.6.20

• -AFM, because it regulates the minimum feature size and the electric field. For instance, the feasibility of carbon nanotube (CNT)-functionalized tips showed great promise for LAO-AFM, yet, the fabrication of CNT tips presents difficulties. Here, we explore the use of a carbon nanofiber (CNF) as the

• of field-induced, chemical process efficiency. Keywords: carbon nanofiber; dynamic mode; local anodic oxidation; nanopatterning; Introduction Scanning probe lithography (SPL) is increasing its relevance among currently employed methods towards miniaturization and investigations at the nanometer

• control upon making CNT probes, as well as characteristic tip-to-tip differences, such as length, diameter, and operational complications, such as CNT buckling [15][16]. In this work, we explore the use of a carbon nanofiber (CNF) as the tip apex of AFM probes for the application of LAO-AFM on silicon

Controlled synthesis and tunable properties of ultrathin silica nanotubes through spontaneous polycondensation on polyamine fibrils

• Jian-Jun Yuan,
• Pei-Xin Zhu,
• Daisuke Noda and
• Ren-Hua Jin

Beilstein J. Nanotechnol. 2013, 4, 793–804, doi:10.3762/bjnano.4.90

• ][23][24][25][26][27][28][29] or amine-modified polysaccharides [30] have been used as template for the formation of silica nanotubes. For example, Yuwono et al. [23] reported the use of peptide-amphiphile nanofiber templates in order to direct the synthesis of hollow silica nanotubes with outer

Electrospinning preparation and electrical and biological properties of ferrocene/poly(vinylpyrrolidone) composite nanofibers

• Ji-Hong Chai and
• Qing-Sheng Wu

Beilstein J. Nanotechnol. 2013, 4, 189–197, doi:10.3762/bjnano.4.19

• nanofiber membrane, and we could see that the membrane is white. Figure 1b reveals that these nanofibers interdigitate to form a feltlike film. The surface morphologies of fibers are rough and the diameter distribution is from 70 to 100 nm and tens of microns in length. Compared with the blank PVP nanofiber

• membrane, Figure 1c shows the optical photograph of the composite Fc/PVP nanofiber membrane. The Fc was loaded at an amount of 45 wt % with respect to PVP mass in the nanofibers, and the membrane clearly changed to pale yellow, which was attributed to the presence of Fc. The surface morphologies of the

• fibers became porous and the diameter obviously increased with the distribution ranging from 100 to 200 nm (Figure 1d). The high surface-to-volume ratio improved the antibacterial activity of the composite Fc/PVP nanofiber membrane. As seen from the presented SEM micrographs (Figure 1d), no Fc crystals

Surface functionalization of aluminosilicate nanotubes with organic molecules

• Wei Ma,
• Weng On Yah,
• Hideyuki Otsuka and
• Atsushi Takahara

Beilstein J. Nanotechnol. 2012, 3, 82–100, doi:10.3762/bjnano.3.10

• introducing a phosphonic acid group to the corresponding molecules. The optical and photophysical properties of these conjugated-molecule-decorated imogolite nanotubes were characterized. Moreover, poly(3-hexylthiophene) (P3HT) chains were further hybridized with HT3P modified imogolite to form a nanofiber

• imogolite surface [61]. In addition, the absence of the 1004 cm–1 band, which is assigned to P–O–H groups [62][63], was another indication that HT3P molecules were chemisorbed onto the surface of the imogolite nanofiber. The FTIR spectrum of HT3OP/imogolite hybrid as shown in Figure 16b gives a similar

• negative charge to imogolite, which restricts the effective motion of positively charged species on the imogolite surface. Poly(3-hexyl thiophene)/imogolite nanofiber hybrid Polythiophenes are one of the well-known families of conductive polymers, and their physicochemical properties, such as their

Approaches to nanostructure control and functionalizations of polymer@silica hybrid nanograss generated by biomimetic silica mineralization on a self-assembled polyamine layer

• Jian-Jun Yuan and
• Ren-Hua Jin

Beilstein J. Nanotechnol. 2011, 2, 760–773, doi:10.3762/bjnano.2.84

• and facilely functionalized makes our nanograss potentially important for device-based application in microfluidic, microreactor and biomedical fields. Keywords: biomimetic silica mineralization; linear polyethyleneimine; nanofiber; nanograss; thin film; Introduction Silica-based, one-dimensional

Formation of precise 2D Au particle arrays via thermally induced dewetting on pre-patterned substrates

• Dong Wang,
• Ran Ji and
• Peter Schaaf

Beilstein J. Nanotechnol. 2011, 2, 318–326, doi:10.3762/bjnano.2.37

• nanoparticles, due to their wide range of potential applications in plasmonics [1][2], magnetic memories [3], DNA detection [4], and catalysis for nanowire and nanofiber growth [5][6]. Nanoparticle arrays are typically fabricated either by chemical processes based on self-assembly or by lithography based