PEGylated versus non-PEGylated magnetic nanoparticles as camptothecin delivery system

• Paula M. Castillo,
• Mario de la Mata,
• Maria F. Casula,
• José A. Sánchez-Alcázar and
• Ana P. Zaderenko

Beilstein J. Nanotechnol. 2014, 5, 1312–1319, doi:10.3762/bjnano.5.144

• acid (CH2 scissoring, 1419 cm−1) and the symmetric stretching of the carboxylate group (around 1467 cm−1, total area = 11.2), and the other at 512 cm−1 that is dependent on the amount of USM nanoparticles (δFe-O, area = 6.6) yields an area ratio of 1.7. In comparison, the skeletal carbon signal in [41

• carboxylate group plus the asymmetric stretching at 1574 cm−1 supports that binding to the magnetic core occurs through carboxylate groups, whereas free acid groups are also detected in the spectrum (around 1700 cm−1) that must be located on the outside of the particles, as illustrated in Scheme 1. In order

Cyclodextrin-poly(ε-caprolactone) based nanoparticles able to complex phenolphthalein and adamantyl carboxylate

• Daniela Ailincai and
• Helmut Ritter

Beilstein J. Nanotechnol. 2014, 5, 651–657, doi:10.3762/bjnano.5.76

• complex phenolphthalein and adamantyl carboxylate. The nanoparticles are characterized by a distinct morphology, i.e., a hydrophobic core formed by the polyester chain and a shell containing the CD part. Moreover, the formed nanoparticles have been proven to encapsulate umbelliferone in the polyester

• hydrophobic compounds, including phenolphthalein and adamantyl carboxylate. The ability of the click reaction product to complex umbelliferone was also investigated, based on its structural similarity with other hydrophobic compounds previously described in the literature as guests for CD. Experimental

• carboxylate complexation by the formed nanoparticles A suspension of the nanoparticles (A) was obtained as previously described. A solution of phenolphthalein in water was prepared, to which trace amounts of NaOH were added to increase the pH and obtain a pinkish solution (B). A was added to B, while stirring

Friction behavior of a microstructured polymer surface inspired by snake skin

• Martina J. Baum,
• Lars Heepe and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2014, 5, 83–97, doi:10.3762/bjnano.5.8

• anhydride (NSA) (61.3%), (2) 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexyl-carboxylate (ERL 4221) (23.6%), (3) diglycidyl ether of polypropyleneglycol (D.E.R. 736) (14.2%), and (4) N,N-dimethylaminoethanol (DMAE) (0.9%). The polymerization of the resin took place over night at 70 °C. The surface roughness

Spin relaxation in antiferromagnetic Fe–Fe dimers slowed down by anisotropic Dy^III ions

• Valeriu Mereacre,
• Frederik Klöwer,
• Yanhua Lan,
• Rodolphe Clérac,
• Juliusz A. Wolny,
• Volker Schünemann,
• Christopher E. Anson and
• Annie K. Powell

Beilstein J. Nanotechnol. 2013, 4, 807–814, doi:10.3762/bjnano.4.92

• (µ2-alkoxo) bridges, to a Dy atom and to an Fe atom in the butterfly. Peripheral ligation is provided by four µ-pivalato ligands in their common syn,syn bridging mode. Two further unidentate pivalates each coordinate to a dysprosium, with the non-coordinated carboxylate oxygen atom accepting a

Site-selective growth of surface-anchored metal-organic frameworks on self-assembled monolayer patterns prepared by AFM nanografting

• Tatjana Ladnorg,
• Alexander Welle,
• Stefan Heißler,
• Christof Wöll and
• Hartmut Gliemann

Beilstein J. Nanotechnol. 2013, 4, 638–648, doi:10.3762/bjnano.4.71

• carried out using an ATR FT-IR microscope. Figure 5c shows the lateral distribution of the band intensities between 1510 cm−1 and 1780 cm−1, which includes the typical region for the asymmetric stretching vibrations of carboxylate groups. It is obvious that the highest intensity can be recognized on the

• stretching vibrations of the carboxylate groups can be detected between 1610 cm−1 and 1550 cm−1, while the bands between 1420 cm−1 and 1300 cm−1 represent the symmetric –COO vibration bands of the deprotonated linker [33][34]. The band at 1446 cm−1 corresponds to the C–C vibration of the aromatic ring of the

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

• Fe nanocrystals at the CNT tips. The final product was a nanoporous membrane with carboxylate functions at the CNT tips. After further chemical functionalization, the nanoporous membrane showed an improvement of the selectivity of the chemical transport across its peculiar architecture. The

The oriented and patterned growth of fluorescent metal–organic frameworks onto functionalized surfaces

• Jinliang Zhuang,
• Jasmin Friedel and
• Andreas Terfort

Beilstein J. Nanotechnol. 2012, 3, 570–578, doi:10.3762/bjnano.3.66

• groups, such as carboxylate and pyridyl groups, capable of coordinating to the constituents of the MOF. It could be demonstrated that this directed coordination also orients the nanocrystals deposited at the surface. Using two different patterning methods, i.e., microcontact printing and electron-beam

• (F4bdc), naphthalene­1,4-dicarboxylate (ndc); P = dabco, 4,4′-bipyridine (bipy)) type SURMOFs [42], two different principal growth directions are expected on MTCA and PPP1 surfaces, which correspond to the directionality of the attachment, either of carboxylate ([110] direction) or of pyridyl groups

• observed, which can be assigned to the reflections of the (110) and (220) planes according to the powder XRD pattern of [Zn2(adc)2(dabco)]. The [110] orientation of the SURMOF is in agreement with the expectation deducible from the crystal structure: The surface carboxylate groups replace, e.g., the

Variations in the structure and reactivity of thioester functionalized self-assembled monolayers and their use for controlled surface modification

• Inbal Aped,
• Yacov Mazuz and
• Chaim N. Sukenik

Beilstein J. Nanotechnol. 2012, 3, 213–220, doi:10.3762/bjnano.3.24

• dimension to the versatility and utility of the SAMs [4][5][6][7]. Our laboratory has reported in situ transformations of siloxane-anchored SAMs in which SAM surface functionality was changed from benzene rings to arylsulfonic acids [8][9], from nitrate esters to hydroxyls [10], and from carboxylate esters

Parallel- and serial-contact electrochemical metallization of monolayer nanopatterns: A versatile synthetic tool en route to bottom-up assembly of electric nanocircuits

• Jonathan Berson,
• Assaf Zeira,
• Rivka Maoz and
• Jacob Sagiv

Beilstein J. Nanotechnol. 2012, 3, 134–143, doi:10.3762/bjnano.3.14

• dense –COOH functionality of the organic monolayer facilitates the establishment of a sufficiently high local concentration of chemisorbed Ag+ ions through the conversion of carboxylic acid groups to the carboxylate salt (–COO−Ag+). In contrast with OTSeo, metal deposition by this mechanism on a

Self-assembled monolayers and titanium dioxide: From surface patterning to potential applications

• Yaron Paz

Beilstein J. Nanotechnol. 2011, 2, 845–861, doi:10.3762/bjnano.2.94

• electrons to titanium dioxide upon illumination with visible light [86] led to the study of a system in which the C60 is anchored to the titanium dioxide through a SAM mediator. The mediator comprised salicylic acid (attached to the TiO2 surface through its carboxylate group) connected to a pyrrodine group

Ceria/silicon carbide core–shell materials prepared by miniemulsion technique

• Lars Borchardt,
• Martin Oschatz,
• Robert Frind,
• Emanuel Kockrick,
• Martin R. Lohe,
• Christoph P. Hauser,
• Clemens K. Weiss,
• Katharina Landfester,
• Bernd Büchner and
• Stefan Kaskel

Beilstein J. Nanotechnol. 2011, 2, 638–644, doi:10.3762/bjnano.2.67

• illustrates that the shape of the PCS spheres was conserved during pyrolysis. Figure 4B shows SiC-Acr spheres synthesized from PCS/acrylic acid. The carboxylate groups were used for molecular binding of ceria [36]. Although a CeO2 shell cannot be seen on SEM pictures, the EDX-analysis of the discrete spheres

Novel acridone-modified MCM-41 type silica: Synthesis, characterization and fluorescence tuning

• Maximilian Hemgesberg,
• Gunder Dörr,
• Yvonne Schmitt,
• Andreas Seifert,
• Zhou Zhou,
• Robin Klupp Taylor,
• Sarah Bay,
• Stefan Ernst,
• Markus Gerhards,
• Thomas J. J. Müller and
• Werner R. Thiel

Beilstein J. Nanotechnol. 2011, 2, 284–292, doi:10.3762/bjnano.2.33

• have been described for carboxylate complexes of Eu(III) [21]. The fluorescence spectrum of the modified silica shows a distinct shoulder at around λem.≈ 515 nm. This indicates a complex radiative relaxation of the formed transition metal species, the fluorescence originating from at least two