Curcumin-loaded albumin submicron particles with potential as a cancer therapy: an in vitro study

• Nittiya Suwannasom,
• Netsai Sriaksorn,
• Chutamas Thepmalee,
• Krissana Khoothiam,
• Ausanai Prapan,
• Hans Bäumler and
• Chonthida Thephinlap

Beilstein J. Nanotechnol. 2023, 14, 1127–1140, doi:10.3762/bjnano.14.93

• structure of HSA-MPs. Sahoo et al. suggested that CUR analogues do not directly interact with the protein in a way that affects its C–H stretching vibrations or amide I band [36]. Circular dichroism (CD) measurements were carried out to determine changes in the secondary structure of HSA-MPs and CUR-HSA-MPs

• , USA). CUR was prepared in DMSO, while the particles were prepared by dilution in deionized water. The FTIR spectra were recorded in the range of 400–4000 cm−1 with a resolution of 4 cm−1. Circular dichroism measurements Circular dichroism (CD) spectra of HSA, HSA-MPs, and CUR- HSA-MPs were recorded

Design of surface nanostructures for chirality sensing based on quartz crystal microbalance

• Yinglin Ma,
• Xiangyun Xiao and
• Qingmin Ji

Beilstein J. Nanotechnol. 2022, 13, 1201–1219, doi:10.3762/bjnano.13.100

• industry, detection and separation of enantiomers are essential for their safe usage. With appropriate detectors and transduction signals, various analysis instruments and techniques have been used for chirality detection or chiral separation. They include circular dichroism (CD) [9], nuclear magnetic

Revealing local structural properties of an atomically thin MoSe₂ surface using optical microscopy

• Lin Pan,
• Peng Miao,
• Anke Horneber,
• Alfred J. Meixner,
• Pierre-Michel Adam and
• Dai Zhang

Beilstein J. Nanotechnol. 2022, 13, 572–581, doi:10.3762/bjnano.13.49

• deposited on a MoS2 crystal surface. Using near-edge X-ray absorption (NEXAFS), it was observed a strong dichroism in FePc thin films thicker than 4.5 nm. The strongest intensity of the N 1s→π* orbital transition at grazing incidence implies that the molecules are predominantly flat-lying with respect to

Influence of magnetic domain walls on all-optical magnetic toggle switching in a ferrimagnetic GdFe film

• Rahil Hosseinifar,
• Evangelos Golias,
• Ivar Kumberg,
• Quentin Guillet,
• Karl Frischmuth,
• Sangeeta Thakur,
• Mario Fix,
• Manfred Albrecht,
• Florian Kronast and
• Wolfgang Kuch

Beilstein J. Nanotechnol. 2022, 13, 74–81, doi:10.3762/bjnano.13.5

• film with out-of-plane easy axis of magnetization by X-ray magnetic circular dichroism photoelectron emission microscopy. Individual linearly polarized laser pulses of 800 nm wavelength and 100 fs duration above a certain threshold fluence reverse the sample magnetization, independent of the

• ]. Due to the helicity-dependent absorption of the laser fluence in the sample as a consequence of magnetic circular dichroism and a sharp intensity threshold for toggle switching, this can also lead to helicity-dependent all-optical single-pulse switching [4][19]. Important for applications of all

• dichroism (XMCD) as magnetic contrast mechanism. We focus single ultrashort infrared laser pulses of 100 fs temporal width to the vicinity of magnetic domain walls and study the local deviations from a perfect, deterministic toggle switching and their relation to the domain-wall position for temperatures

The patterning toolbox FIB-o-mat: Exploiting the full potential of focused helium ions for nanofabrication

• Victor Deinhart,
• Lisa-Marie Kern,
• Jan N. Kirchhof,
• Sabrina Juergensen,
• Joris Sturm,
• Enno Krauss,
• Thorsten Feichtner,
• Sviatoslav Kovalchuk,
• Michael Schneider,
• Dieter Engel,
• Bastian Pfau,
• Bert Hecht,
• Kirill I. Bolotin,
• Stephanie Reich and
• Katja Höflich

Beilstein J. Nanotechnol. 2021, 12, 304–318, doi:10.3762/bjnano.12.25

• nanometer-scale domain configurations were imaged via soft X-ray holography [39], exploiting X-ray magnetic circular dichroism [40] and giving rise to an absorption contrast of areas with different out-of-plane magnetization. Areas irradiated with an ion dose of 50 ions/nm2 no longer show an out-of-plane

Molecular architectonics of DNA for functional nanoarchitectures

• Debasis Ghosh,
• Lakshmi P. Datta and
• Thimmaiah Govindaraju

Beilstein J. Nanotechnol. 2020, 11, 124–140, doi:10.3762/bjnano.11.11

• assemblies, while with dA10, the formation of a P-type helix was preferred. pH-dependent circular dichroism (CD) measurements showed the collapse of the double-helical zipper assemblies at pH < 6 (Figure 4b). Remarkably, the nanofiber (molecular) structure of the individual double-helical zipper assembly

Gold and silver dichroic nanocomposite in the quest for 3D printing the Lycurgus cup

• Lars Kool,
• Floris Dekker,
• Anton Bunschoten,
• Glen J. Smales,
• Brian R. Pauw,
• Aldrik H. Velders and
• Vittorio Saggiomo

Beilstein J. Nanotechnol. 2020, 11, 16–23, doi:10.3762/bjnano.11.2

• Berlin, Germany 10.3762/bjnano.11.2 Abstract The Lycurgus cup is an ancient glass artefact that shows dichroism as it looks green when a white light is reflected on it and a red colouring appears when a white light is transmitted through it. This peculiar dichroic effect is due to silver and gold

• nanoparticles present in the glass. In this research we show the synthesis of dichroic silver nanoparticles and their embedding in a 3D printable nanocomposite. The addition of gold nanoparticles to the silver nanoparticle composite, gave a 3D printable nanocomposite with the same dichroism effect of the

• Lycurgus cup. Keywords: 3D printing; dichroism; Lycurgus cup; nanocomposite; Introduction The Lycurgus cup is, without any doubt, one of the most fascinating glass artefacts in the history of humankind [1]. This 4th century Roman cup, classified as cage cup, is a wonderful masterpiece of glass working

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

• below). To check the possible denaturation of CDP by the organic solvents as an explanation for the decreased monomer conversions, circular dichroism (CD) spectra of CDP solutions containing 10 vol % MeCN or EtOH were measured after incubation at 60 °C (Figure 4). Note that the light absorption of DMSO

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

• glutamide. We speculate that the substituent position of NO2 might affect the arrangement of molecules in the self-assembly process and subsequently lead to a different packing model of the NCLG compounds. UV–vis and circular dichroism spectra In order to further understand the different self-assembly

• behaviors among the NCLG molecules, the UV–vis spectra and circular dichroism (CD) spectra were investigated (Figure 3). Figure 3a shows the UV–vis spectra of NCLG solutions and assemblies in ethanol. It can be clearly observed that the 2NCLG, 3NCLG and 4NCLG solutions exhibited main absorption bands at

Nanoscale optical and structural characterisation of silk

• Meguya Ryu,
• Reo Honda,
• Adrian Cernescu,
• Arturas Vailionis,
• Armandas Balčytis,
• Jitraporn Vongsvivut,
• Jing-Liang Li,
• Denver P. Linklater,
• Elena P. Ivanova,
• Vygantas Mizeikis,
• Mark J. Tobin,
• Junko Morikawa and
• Saulius Juodkazis

Beilstein J. Nanotechnol. 2019, 10, 922–929, doi:10.3762/bjnano.10.93

• orientation dependency of the birefringence Δn and dichroism Δκ, define the optical response of a material. The reflectance R is proportional to the real part, while the absorbance A corresponds to the imaginary part of . Recently, we demonstrated that the IR measurements of silk performed using three

• determined from the known values of reflectance R and extinction κ following the equation n = [(1 + R)/(1 − R)] + [4R/(1 − R)2 − κ2]1/2. However, R was not measured in this experiment. Anisotropy in absorption is defined by the dichroism where k = 2π/λ is the wave vector. It defines the losses in

• transmission T, at the maximum and minimum orientations of linear polarisation . The dichroism was estimated for the amide bands. For the amide-A band, Δ” ≈ 0.014 suggests only a minute transmission change for the two perpendicular polarisations. Similarly, the results obtained for the amide-I band (Δ

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

• , for example, for the 3D fabrication of optical filters. Keywords: 3D printing; dichroism; gold nanoparticles; nanocomposite; Introduction As evidenced by paleolithic cave paintings [1], humans have always been fascinated by colors. Next to the traditional inorganic and organic colorants

• S1). In addition to the surface plasmon resonance color [15], the large size of the nanoparticles increases the Mie scattering [16], giving rise to the opaque reflection. However, the elongated shape of the nanoparticles may also contribute to the dichroism, as nanoparticles with an aspect ratio

• larger than 1.2 have been shown to possess dichroic properties [17]. Even a bimodal size distribution of spherical nanoparticles may present dichroism as well [18]. The presented synthesis is easy and fast, as it takes only few minutes to obtain the dichroic solution after the addition of the citrate

Size limits of magnetic-domain engineering in continuous in-plane exchange-bias prototype films

• Alexander Gaul,
• Daniel Emmrich,
• Timo Ueltzhöffer,
• Henning Huckfeldt,
• Hatice Doğanay,
• Johanna Hackl,
• Muhammad Imtiaz Khan,
• Daniel M. Gottlob,
• Gregor Hartmann,
• André Beyer,
• Dennis Holzinger,
• Slavomír Nemšák,
• Claus M. Schneider,
• Armin Gölzhäuser,
• Günter Reiss and
• Arno Ehresmann

Beilstein J. Nanotechnol. 2018, 9, 2968–2979, doi:10.3762/bjnano.9.276

• stripe domains [43]. To complement the MFM data, X-PEEM measurements have been performed to analyze the local magnetization states by X-ray magnetic circular dichroism (XMCD) measurements. Two different sensitivity directions have been chosen: Figure 2a–c shows the results when the projection of the

Nanoscale characterization of the temporary adhesive of the sea urchin Paracentrotus lividus

• Ana S. Viana and
• Romana Santos

Beilstein J. Nanotechnol. 2018, 9, 2277–2286, doi:10.3762/bjnano.9.212

• to obtain more representative results and indicate that sea urchin adhesives might contain amyloid quaternary protein structures or β-sheet-rich proteins, but this should be further confirmed by complementary methods such as circular dichroism spectroscopy, TEM or Fourier transform infrared

Circular dichroism of chiral Majorana states

• Javier Osca and
• Llorenç Serra

Beilstein J. Nanotechnol. 2018, 9, 1194–1199, doi:10.3762/bjnano.9.110

• condensed matter devices may be of a localized nature, such as in hybrid semiconductor/superconductor nanowires, or chirally propagating along the edges such as in hybrid 2D quantum-anomalous Hall/superconductor structures. Results: We calculate the circular dichroism due to chiral Majorana states in a

• hybrid structure made of a quantum-anomalous Hall insulator and a superconductor. The optical absorption of chiral Majorana states is characterized by equally spaced absorption peaks of both positive and negative dichroism. In the limit of a very long structure (a 2D ribbon) peaks of a single sign are

• favored. Conclusion: Circular-dichroism spectroscopy of chiral Majorana states is suggested as a relevant probe for these peculiar states of topological matter. Keywords: chiral states; circular dichroism; Majorana modes; optical absorption; topological matter; Introduction The physics of Majorana

Optical orientation of nematic liquid crystal droplets via photoisomerization of an azodendrimer dopant

• Sergey A. Shvetsov,
• Alexander V. Emelyanenko,
• Natalia I. Boiko,
• Alexander S. Zolot'ko,
• Yan-Song Zhang,
• Jui-Hsiang Liu and
• Alexei R. Khokhlov

Beilstein J. Nanotechnol. 2018, 9, 870–879, doi:10.3762/bjnano.9.81

• pack loosely with respect to each other without coiling. The existence of smectic and columnar mesophases of pure G5 dendrimer, as well as large absorption dichroism [39] of G5 dendrimer dissolved in NLC, clearly shows that the dendrimer branches can be oriented in some direction due to molecular

• with M or G5 were measured before and after LED irradiation (Figure 5). The decrease of the light wavelength leads to a sequential reduction of the absorption near the absorption band of the trans isomer (about 365 nm). At the same time, the dichroism D = (αe − αo)/(αe + αo) of the samples is also

• reduced. The reduction of D is larger for the G5-doped NLC than for the M-doped NLC. For example, after LED illumination with λmax = 406 nm, the dichroism D is equal to 0.8 for M-doped NLC and 0.1 for G5-doped NLC. This difference can be explained by the higher concentration of cis isomers or by the

Valley-selective directional emission from a transition-metal dichalcogenide monolayer mediated by a plasmonic nanoantenna

• Haitao Chen,
• Mingkai Liu,
• Lei Xu and
• Dragomir N. Neshev

Beilstein J. Nanotechnol. 2018, 9, 780–788, doi:10.3762/bjnano.9.71

• dichroism measurements of chiral molecules. Design principles of the directional emission from the different TMDC valleys. (a) The proposed scheme to separate emission from different valleys through integrating with a properly designed nanoantenna. The directions of the emission from monolayer TMDCs depend

Self-assembly of chiral fluorescent nanoparticles based on water-soluble L-tryptophan derivatives of p-tert-butylthiacalix[4]arene

• Pavel L. Padnya,
• Irina A. Khripunova,
• Olga A. Mostovaya,
• Timur A. Mukhametzyanov,
• Vladimir G. Evtugyn,
• Vyacheslav V. Vorobev,
• Yuri N. Osin and
• Ivan I. Stoikov

Beilstein J. Nanotechnol. 2017, 8, 1825–1835, doi:10.3762/bjnano.8.184

• , probably does not contribute to excimer formation. It is known that circular dichroism (CD) spectroscopy is widely used for the analysis of the secondary structure of proteins [58]. It is possible to assume exactly how the molecule of the linear polypeptide is packed in space by the form of the CD spectrum

(Metallo)porphyrins for potential materials science applications

• Lars Smykalla,
• Carola Mende,
• Michael Fronk,
• Pablo F. Siles,
• Michael Hietschold,
• Georgeta Salvan,
• Dietrich R. T. Zahn,
• Oliver G. Schmidt,
• Tobias Rüffer and
• Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 1786–1800, doi:10.3762/bjnano.8.180

• limited, while magneto-optical studies of porphyrinoids [13] conducted by magnetic circular dichroism (MCD) are numerous and have been already comprehensively reviewed [14]. As the commonly applied MCD spectroscopy requires the compounds to be solubilized or deposited on transparent substrates

• specificity. If known, the Voigt constant can be used to predict the magneto-optical response of a sample both in reflection (MOKE geometry) and transmission (Faraday geometry) measurements. The ellipticity of the transmitted light is labelled as magnetic circular dichroism (MCD). For solutions or transparent

Luminescent supramolecular hydrogels from a tripeptide and nitrogen-doped carbon nanodots

• Maria C. Cringoli,
• Slavko Kralj,
• Marina Kurbasic,
• Massimo Urban and
• Silvia Marchesan

Beilstein J. Nanotechnol. 2017, 8, 1553–1562, doi:10.3762/bjnano.8.157

• by rheometry, fluorescence, circular dichroism (CD), FTIR spectroscopy, transmission electron microscopy (TEM), and differential scanning calorimetry (DSC). Given that this tripeptide is capable of forming a hydrogel with mild antimicrobial activity and a lack of cytotoxicity in vitro [26], this new

• fluorescence emission spectra was registered, and the NCND fluorescence stability was not affected over a 7-day period. Peptide conformation in the presence of NCNDs Peptide conformation was assessed by means of circular dichroism (CD), FTIR spectroscopy, and thioflavin T fluorescence. CD was used to monitor

• –peptide hydrogels The NCND–peptide hydrogels were assessed for their thermal stability by means of differential scanning calorimetry (DSC) and circular dichroism (CD) with a heating ramp from room temperature up to complete disappearance of the CD signal (see Supporting Information File 1). DSC did not

Triptycene-terminated thiolate and selenolate monolayers on Au(111)

• Jinxuan Liu,
• Martin Kind,
• Björn Schüpbach,
• Daniel Käfer,
• Stefanie Winkler,
• Wenhua Zhang,
• Andreas Terfort and
• Christof Wöll

Beilstein J. Nanotechnol. 2017, 8, 892–905, doi:10.3762/bjnano.8.91

• compared to the Se-anchored TrpSe0 and TrpSe1 films. NEXAFS spectroscopy Carbon K-edge NEXAFS spectra of the Trp0S-, Trp0Se-, Trp1S-, and Trp1Se-SAMs were recorded at different incidence angles of the X-ray beam and are displayed in Figure 5. For all four monolayers, a pronounced dichroism is evident, i.e

Selective detection of Mg²⁺ ions via enhanced fluorescence emission using Au–DNA nanocomposites

• Tanushree Basu,
• Khyati Rana,
• Niranjan Das and
• Bonamali Pal

Beilstein J. Nanotechnol. 2017, 8, 762–771, doi:10.3762/bjnano.8.79

• from the observed changes in the optical absorption, plasmon band, zeta potential, DLS particle size distribution, as well as TEM and AFM surface morphology analysis. Circular dichroism studies also revealed that DNA-functionalized AuNP binding caused a conformational change in the DNA structure. Due

• interactions between chromophoric bases, resulting in intense circular dichroism (CD) spectra. The DNA in its characteristic right-handed B form exhibits an absorbance spectrum in the far UV region (220–320 nm). The free DNA showed a negative peak at 247 nm and a positive peak at approximately 278 nm in the CD

• alkanethiol double-stranded DNA from solution and re-dispersed in fresh, sterile, deionized water. Various techniques such as UV–vis spectroscopy (using a Specord 205 spectrophotometer), circular dichroism (CD) spectroscopy (Jasco, 815), atomic force microscopy (AFM), and fluorescence spectroscopy were used

Cubic chemically ordered FeRh and FeCo nanomagnets prepared by mass-selected low-energy cluster-beam deposition: a comparative study

• Veronique Dupuis,
• Anthony Robert,
• Arnaud Hillion,
• Ghassan Khadra,
• Nils Blanc,
• Damien Le Roy,
• Florent Tournus,
• Clement Albin,
• Olivier Boisron and
• Alexandre Tamion

Beilstein J. Nanotechnol. 2016, 7, 1850–1860, doi:10.3762/bjnano.7.177

• using various experimental techniques [4]. Here, we focus on anomalous X-rays diffraction (AXD) and X-ray magnetic circular dichroism (XMCD) performed by using well-adapted synchrotron radiation beamlines. We show how the competition between the stable bimetallic NPs structure and their chemical

Large-scale fabrication of achiral plasmonic metamaterials with giant chiroptical response

• Morten Slyngborg,
• Yao-Chung Tsao and
• Peter Fojan

Beilstein J. Nanotechnol. 2016, 7, 914–925, doi:10.3762/bjnano.7.83

• surface or through functionalized surfaces to increase the sensing sensitivity. Besides increasing the sensing sensitivity, these metamaterials may also be commercialized and find applications in surface-enhanced IR spectroscopy, terahertz generation and terahertz circular dichroism spectroscopy

• optical activity [9] such as circular dichroism (CD) [10]. Among other things, this makes them useful for the production of sensing devices for organic molecules and biomolecules [10]. Recently, the phenomena of the long proposed extrinsic chirality dating back to 1945 [11] have been observed

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

• composite DNA nanostructures was observed. Native PAGE, circular dichroism (CD) and atomic force microscopy (AFM) have been utilized for analyzing the formation of DNA nanofibers after the coassembly. Computational methods were applied to discern the theoretical dimension of the DNA–TPA molecular building

• native PAGE, circular dichroism (CD), thermal melting analysis, mung bean nuclease digestion (MBN), computational studies and atomic force microscopy (AFM). These comprehensive experimental and computational studies provided detailed information pertaining to the formation of composite DNA nanostructures

Effects of spin–orbit coupling and many-body correlations in STM transport through copper phthalocyanine

• Benjamin Siegert,
• Andrea Donarini and
• Milena Grifoni

Beilstein J. Nanotechnol. 2015, 6, 2452–2462, doi:10.3762/bjnano.6.254

• of metallorganic compounds, such as the widely studied metal phthalocyanines [7][8], exhibit sizeable magnetic anisotropy induced by the interplay of electronic correlations and SOI. Indeed, in an X-ray magnetic circular dichroism (XMCD) analysis copper phthalocyanine (CuPc) was found to exhibit