Enhancing mechanical properties of chitosan/PVA electrospun nanofibers: a comprehensive review

• Nur Areisman Mohd Salleh,
• Amalina Muhammad Afifi,
• Fathiah Mohamed Zuki and
• Hanna Sofia SalehHudin

Beilstein J. Nanotechnol. 2025, 16, 286–307, doi:10.3762/bjnano.16.22

• . This process leads to a decrease in the number of hydroxy groups present on the PVA chain, resulting in the release of water molecules. Simultaneously, the remaining hydroxy groups facilitate the formation of intramolecular hydrogen bonds. Additionally, intermolecular hydrogen bonds can form between

Directed growth of quinacridone chains on the vicinal Ag(35 1 1) surface

• Niklas Humberg,
• Lukas Grönwoldt and
• Moritz Sokolowski

Beilstein J. Nanotechnol. 2024, 15, 556–568, doi:10.3762/bjnano.15.48

• sample temperature of 300 K, QA forms the same kind of molecular chains as on the nominally flat Ag(100) surface because of strong intermolecular hydrogen bonds, which we reported in a previous publication [Humberg, N.; Bretel, R.; Eslam, A.; Le Moal, E.; Sokolowski, M. J. Phys. Chem. C 2020, 124, 24861

• step edges. Keywords: Ag(100); intermolecular hydrogen bonds; one-dimensional aggregates; organic nanostructures; quinacridone; step-molecule interactions; vicinal surface; Introduction A versatile and powerful method to create nanostructures on surfaces is the self-assembly of atoms and molecules

• hydrogen bonds (H-bonds) [19] support the growth of long 1D chains of parallel oriented QA molecules, both in bulk crystals and on surfaces. It has been shown by Głowacki et al. that QA exhibits promising properties for applications in electronic and optoelectronic devices [20][21]. In particular, they

Self-assembly of amino acids toward functional biomaterials

• Huan Ren,
• Lifang Wu,
• Lina Tan,
• Yanni Bao,
• Yuchen Ma,
• Yong Jin and
• Qianli Zou

Beilstein J. Nanotechnol. 2021, 12, 1140–1150, doi:10.3762/bjnano.12.85

• nanoparticles (PWG) capable of spontaneous assembly under physiological conditions. Interestingly, since glycine provides carboxyl groups and is acid-sensitive, when the nanoparticles reach the tumor site, the acidity increases and the protonation of PWG promotes the formation of intermolecular hydrogen bonds

High-tolerance crystalline hydrogels formed from self-assembling cyclic dipeptide

• Yongcai You,
• Ruirui Xing,
• Qianli Zou,
• Feng Shi and
• Xuehai Yan

Beilstein J. Nanotechnol. 2019, 10, 1894–1901, doi:10.3762/bjnano.10.184

• and heat, may be due to the entangled fiber network and extensive intermolecular hydrogen bonds in the hydrogel. In summary, the C-WY hydrogel was found to exhibit excellent environmental tolerance, including resistance to biopolymers, pH, and heat. Hence, the C-WY hydrogel is promising for

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

• 4NCLG molecules. Both of the molecules are misaligned in their crystal, which indicates that the bottom molecule is not directly below the upper one. Additionally, the length of intermolecular hydrogen bonds of 2NCLG and 4NCLG assemblies were found to be 1.2 Å and 2.0 Å, respectively. While for 3NCLG

• , the bottom molecule is right below the upper one and the length of intermolecular hydrogen bonds is 2.3 Å (i.e., longer than that of 2NCLG and 3NCLG). This result further demonstrated that the hydrogen bonding of the 3NCLG assembly was weaker than for the 2NCLG and 4NCLG assemblies. The difference in

Pure and mixed ordered monolayers of tetracyano-2,6-naphthoquinodimethane and hexathiapentacene on the Ag(100) surface

• Robert Harbers,
• Timo Heepenstrick,
• Dmitrii F. Perepichka and
• Moritz Sokolowski

Beilstein J. Nanotechnol. 2019, 10, 1188–1199, doi:10.3762/bjnano.10.118

• planar molecules have been investigated [4][5][6][7][8]. As a result, one finds that, on metallic surfaces, indirect intermolecular charge transfer mediated by the surface plays an important role in addition to intermolecular hydrogen bonds [5]. Particularly interesting are π-conjugated molecules with

• of two opposing hydrogen atoms between these two bonds. This motif of two intermolecular hydrogen bonds with an intermediate pair of two opposing hydrogen atoms was also found in the pure TNAP monolayer and in the mixed structures of TNAP/TTF [16], TNAP/TTT [17], and TNAP/TBTA [17]. As far as we know

• hydrogen bonds (green lines). (c) Drift-corrected and filtered STM image. The fast scanning direction is the vertical direction (Ub = −0.81 V; It = 127 pA). A hard-sphere model of the structure derived from LEED has been overlaid. The non-symmetric shape of the molecule is assigned to tip effects, but not

Topochemical engineering of composite hybrid fibers using layered double hydroxides and abietic acid

• Liji Sobhana,
• Lokesh Kesavan,
• Jan Gustafsson and
• Pedro Fardim

Beilstein J. Nanotechnol. 2019, 10, 589–605, doi:10.3762/bjnano.10.60

• composites by utilizing the intermolecular hydrogen bonds in natural materials. These materials include wood pulp fibers, abietic acid (resin acid) and inexpensive metal salts. In this work, a hybrid composite was created using bleached and unbleached kraft pulp fibers as cellulose platform. In situ co

Phenalenyl-based mononuclear dysprosium complexes

• Yanhua Lan,
• Andrea Magri,
• Olaf Fuhr and
• Mario Ruben

Beilstein J. Nanotechnol. 2016, 7, 995–1009, doi:10.3762/bjnano.7.92

• between O6H6 and O5 (1.90 Å) associated with the non-depronated phenalenyl, and an intermolecular hydrogen bond between O7H7 and Cl1 (2.49 Å) involving EtOH. Clearly, the intermolecular hydrogen bonds, together with the π–π stacking (ca. 3.45 Å) between the phenalenyl moieties, aid the molecular packing

• hydrogen bonds packs the molecules together and drives the co-crystallization. Additionally, weak π–π stacking (ca. 3.61 Å) between the phenalenyl moieties of 2a and 2b might be also responsible for the co-crystallization of the complexes in one asymmetric unit. Compound [Dy(PLN)3(H2O)2]·H2O (3

• . Two more hydrogen bonds, O16H16-O9 (2.06 Å) and O17aH17a-O12 (2.23 Å), take place between the deprotonated phenalenyls and one EtOH in the crystal lattice. As clearly depicted in Figure S3 (Supporting Information File 1), the presence of EtOH molecules in the crystal lattice forming intermolecular

Virtual reality visual feedback for hand-controlled scanning probe microscopy manipulation of single molecules

• Philipp Leinen,
• Matthew F. B. Green,
• Taner Esat,
• Christian Wagner,
• F. Stefan Tautz and
• Ruslan Temirov

Beilstein J. Nanotechnol. 2015, 6, 2148–2153, doi:10.3762/bjnano.6.220

• an Ag(111). Blue lines mark the expected positions of intermolecular hydrogen bonds. Red circles mark positions of carboxylic oxygen atoms that may be used for contacting the molecule by the tip. Here we only contact the oxygen atoms marked by solid circles. Scheme of the set-up used for HCM with a

Influence of the solvent on the stability of bis(terpyridine) structures on graphite

• Daniela Künzel and
• Axel Groß

Beilstein J. Nanotechnol. 2013, 4, 269–277, doi:10.3762/bjnano.4.29

• , it is important to note that liquid water is only poorly reproduced by the force fields considered in this study due to problems with the reliable description of intermolecular hydrogen bonds and liquid densities. For TCB on the other hand, the force-field results are reasonably accurate, possibly

• satisfactory in a quantitative way. Obviously the problem with the description of the intermolecular hydrogen bonds directly translates to inaccurate solvation energies in water. Still, most of the force fields are able to show that pyridine and benzene have small negative solvation energies in water, so the

Dimer/tetramer motifs determine amphiphilic hydrazine fibril structures on graphite

• Loji K. Thomas,
• Nadine Diek,
• Uwe Beginn and
• Michael Reichling

Beilstein J. Nanotechnol. 2012, 3, 658–666, doi:10.3762/bjnano.3.75

• functionalities can efficiently stabilize structures through intermolecular hydrogen bonds. On the other hand, the alkyl chains are expected to promote self-assembly into extended structures through interchain van der Waals interactions as well as adsorption on HOPG due to their epitaxial match with the C–C bonds

Septipyridines as conformationally controlled substitutes for inaccessible bis(terpyridine)-derived oligopyridines in two-dimensional self-assembly

• Daniel Caterbow,
• Daniela Künzel,
• Michael G. Mavros,
• Axel Groß,
• Katharina Landfester and
• Ulrich Ziener

Beilstein J. Nanotechnol. 2011, 2, 405–415, doi:10.3762/bjnano.2.46

• ± 2° is observed. A closer look at the bright areas reveals small bright spots, which we attribute to the single (hetero)aromatic rings. The submolecular resolution allows for the suggestion of a tentative model. Self-assembly can be explained by the presence of intermolecular hydrogen bonds, which is

• isomers, the BTP molecules arrange in a similar fashion (Figure 5), forming intermolecular hydrogen bonds at comparable positions. In addition, the lattice constants of the relaxed network differ by less than 1%. For 2,4'-BTP (2), the Compass-optimized [32] lattice constant is 3.23 nm, and it is 3.26 nm

• assembled in rows (lamellae). There are intra- and interpair interactions based on single and double intermolecular hydrogen bonds between neighboring ortho-connected pyridine rings. There are no hydrogen bonding interactions between the rows. A further conformational arrangement could be imagined where the

Influence of water on the properties of an Au/Mpy/Pd metal/molecule/metal junction

• Jan Kučera and
• Axel Groß

Beilstein J. Nanotechnol. 2011, 2, 384–393, doi:10.3762/bjnano.2.44

• compared to the adsorption energy of a single water molecule, e.g., for the Hdown structure on Pd(111) it is −0.56 eV per molecule. However, the dominating contribution is coming from intermolecular hydrogen bonds rather then from water–molecule interactions [16][18]. Consequently, because of the rather

• monomer and the palladium layer of the Au/Mpy/Pd complex. This corresponds to a water coverage () of 1/3 of a monolayer (ML) in which individual H2O molecules are relatively isolated from each other and do not form intermolecular hydrogen bonds. In the second step we add another H2O molecule to the layer

• usually the attractive water–water interaction through intermolecular hydrogen bonds contributes significantly to the stability of water layers on metal surfaces [16][18]. However, it has to be noted that there is no way to uniquely decompose the two contributions to the water adsorption energy since the