Berberine-loaded polylactic acid nanofiber scaffold as a drug delivery system: The relationship between chemical characteristics, drug-release behavior, and antibacterial efficiency

• Le Thi Le,
• Hue Thi Nguyen,
• Liem Thanh Nguyen,
• Huy Quang Tran and
• Thuy Thi Thu Nguyen

Beilstein J. Nanotechnol. 2024, 15, 71–82, doi:10.3762/bjnano.15.7

• after stretching the PLA solution during the electrospinning process displays only a broad scattering band, located at around 2θ = 21.3°, indicating an amorphous structure of PLA nanofibers. Due to the stretching and rapid solidification of the PLA solution during traveling from the needle to the

TEM sample preparation of lithographically patterned permalloy nanostructures on silicon nitride membranes

• Joshua Williams,
• Michael I. Faley,
• Joseph Vimal Vas,
• Peng-Han Lu and
• Rafal E. Dunin-Borkowski

Beilstein J. Nanotechnol. 2024, 15, 1–12, doi:10.3762/bjnano.15.1

• membrane also allows for high-resolution patterning since there is less electron scattering during exposure [26]. The purpose of applying two layers of resist is to create a large undercut by using a bottom layer that is more sensitive than the top layer. This prevents the unwanted deposition of metal that

Fluorescent bioinspired albumin/polydopamine nanoparticles and their interactions with Escherichia coli cells

• Eloïse Equy,
• Jordana Hirtzel,
• Sophie Hellé,
• Béatrice Heurtault,
• Eric Mathieu,
• Morgane Rabineau,
• Vincent Ball and
• Lydie Ploux

Beilstein J. Nanotechnol. 2023, 14, 1208–1224, doi:10.3762/bjnano.14.100

• measured by dynamic light scattering (DLS) using a Zetasizer Nano ZS from Malvern Panalytical (Malvern, UK). Measurements were performed while taking into account a refractive index of 1.73 − 0.02i for PDA (the imaginary part corresponds to the absorption coefficient) at a wavelength of 589 nm, that is

A combined gas-phase dissociative ionization, dissociative electron attachment and deposition study on the potential FEBID precursor [Au(CH₃)₂Cl]₂

• Elif Bilgilisoy,
• Ali Kamali,
• Thomas Xaver Gentner,
• Gerd Ballmann,
• Sjoerd Harder,
• Hans-Peter Steinrück,
• Hubertus Marbach and
• Oddur Ingólfsson

Beilstein J. Nanotechnol. 2023, 14, 1178–1199, doi:10.3762/bjnano.14.98

• nanostructures are critical for the enhancement of absorption and controlled scattering of light [10]. Focused-electron-beam-induced deposition (FEBID) is a direct writing method for controlled deposition/fabrication of nanostructures on either flat or nonflat surfaces. It offers excellent shape control and thus

• . In FEBID, the irradiation of the substrate with a high-energy focused electron beam results in elastic and inelastic electron scattering, including ionizing events. The latter leads to the production of numerous reactive, low-energy scattered and secondary electrons. These play a significant role in

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

• scattering (DLS) (Figure 2B) shows that the hydrodynamic diameter of HSA-MPs ranged from 800 to 900 nm (888 ± 64 nm) with a PDI value of 0.30. These results are similar to those of CUR-HSA-MPs, which ranged from 900 to 1000 nm (983.57 ± 82 nm) in size with a PDI value of 0.31 (Supporting Information File 1

A visible-light photodetector based on heterojunctions between CuO nanoparticles and ZnO nanorods

• Doan Nhat Giang,
• Nhat Minh Nguyen,
• Duc Anh Ngo,
• Thanh Trang Tran,
• Le Thai Duy,
• Cong Khanh Tran,
• Thi Thanh Van Tran,
• Phan Phuong Ha La and
• Vinh Quang Dang

Beilstein J. Nanotechnol. 2023, 14, 1018–1027, doi:10.3762/bjnano.14.84

• to the bandgap of ZnO (Eg = 3.2 eV). Especially, the CuO NPs/ZnO NRs sample exhibits absorption in the visible-light region. Decorating CuO NPs on ZnO NRs allows for more light scattering and absorption because the material’s surface and edges become rougher than the flat surface of pristine ZnO NRs

Nanoarchitectonics of photothermal materials to enhance the sensitivity of lateral flow assays

• Elangovan Sarathkumar,
• Rajasekharan S. Anjana and
• Ramapurath S. Jayasree

Beilstein J. Nanotechnol. 2023, 14, 988–1003, doi:10.3762/bjnano.14.82

• are likely to occur, namely (i) the relaxation of electrons from non-Fermi levels to the Fermi level (electron–electron scattering), (ii) the cooling of hot electron gas through electron–phonon scattering, and (iii) the emission of heat to the surrounding (phonon–phonon scattering) (Figure 4A,B). The

• nanomaterials become larger, they deflect more light than they absorb, resulting in reduced photothermal conversion [53]. This is because the ratio between absorption coefficient (µa) and scattering coefficient (µs) is higher for smaller particles. Compared to the 80 nm gold nanoparticles (µa = 67.88 µm−1), 40

• -to-scattering ratios of gold nanorods and gold nanoshells are high compared to that of gold nanoparticles and can be further increased by changing the dimensions or the cross-sectional areas [56][57]. Light scattering of nanomaterials should be minimum for an efficient photon-to-heat conversion. The

Fragmentation of metal(II) bis(acetylacetonate) complexes induced by slow electrons

• Janina Kopyra and
• Hassan Abdoul-Carime

Beilstein J. Nanotechnol. 2023, 14, 980–987, doi:10.3762/bjnano.14.81

• incoming scattering electron is captured by the precursor molecule to form a transient negative ion, TNI or [ML2]#−. If the electron autodetachment time of the TNI is longer than the dissociation time, the transient anion undergoes dissociation into a negative fragment and one or more neutral counterpart(s

• , but also some small contribution of the dimer of the nucleobase [28]. Thus, we have suggested that the production of the [L]− anion near 0 eV may occur from the scattering of electrons at trimeric complexes for which the formation enthalpies have been calculated to be exothermic [15][16][17][18][19

Isolation of cubic Si₃P₄ in the form of nanocrystals

• Polina K. Nikiforova,
• Sergei S. Bubenov,
• Vadim B. Platonov,
• Andrey S. Kumskov,
• Nikolay N. Kononov,
• Tatyana A. Kuznetsova and
• Sergey G. Dorofeev

Beilstein J. Nanotechnol. 2023, 14, 971–979, doi:10.3762/bjnano.14.80

• , USA). TEM was carried out on a FEI Osiris microscope (Thermo Fisher Scientific, USA) at an accelerating voltage of 200 kV. Raman scattering of pellets of Si3P4 samples was obtained with an iRamanPlus (BW Tech) portable Raman spectrometer (532 nm laser). The integration time was 10 min, and eight

• theoretical diffraction pattern of Si3P4; the vertical lines height is scaled to relative intensity of the respective maximum. Raman scattering spectra of (a) SP900, (b) SP670, and (c) SP550. IR spectra of (a) Si, (b) SP900, (c) SP670, and (d) SP400. Tauc plot of the optical absorption of a Si3P4 NPs sample

Low temperature atomic layer deposition of cobalt using dicobalt hexacarbonyl-1-heptyne as precursor

• Mathias Franz,
• Mahnaz Safian Jouzdani,
• Lysann Kaßner,
• Marcus Daniel,
• Frank Stahr and
• Stefan E. Schulz

Beilstein J. Nanotechnol. 2023, 14, 951–963, doi:10.3762/bjnano.14.78

• resistance to electromigration and lowers the tendency to undergo diffusion, giving a higher stability in environments involving both elevated temperature and high current densities [1][3]. In current technology nodes with device dimensions below 10 nm, electron scattering becomes the dominant factor in

Upscaling the urea method synthesis of CoAl layered double hydroxides

• Camilo Jaramillo-Hernández,
• Víctor Oestreicher,
• Martín Mizrahi and
• Gonzalo Abellán

Beilstein J. Nanotechnol. 2023, 14, 927–938, doi:10.3762/bjnano.14.76

• package. The k2-weighted χ(k) data, to enhance the oscillations at higher k, were Fourier-transformed. The Fourier transformation was calculated using the sine filtering function. EXAFS modelling was carried out using the ARTEMIS software [77]. Theoretical scattering path amplitudes and phase shifts for

Nanostructured lipid carriers containing benznidazole: physicochemical, biopharmaceutical and cellular in vitro studies

• Giuliana Muraca,
• María Esperanza Ruiz,
• Rocío C. Gambaro,
• Sebastián Scioli-Montoto,
• María Laura Sbaraglini,
• Gisel Padula,
• José Sebastián Cisneros,
• Cecilia Yamil Chain,
• Vera A. Álvarez,
• Cristián Huck-Iriart,
• Guillermo R. Castro,
• María Belén Piñero,
• Matias Ildebrando Marchetto,
• Catalina Alba Soto,
• Germán A. Islan and
• Alan Talevi

Beilstein J. Nanotechnol. 2023, 14, 804–818, doi:10.3762/bjnano.14.66

• ) and a biphasic drug release profile with an initial burst release followed by a prolonged phase. The hydrodynamic average diameter and zeta potential of NLC obtained by dynamic light scattering were approximately 150 nm and −13 mV, respectively, while spherical and well-distributed nanoparticles were

• observed by transmission electron microscopy. Fourier-transform infrared spectroscopy, differential scanning calorimetry, thermogravimetric analysis, and small-angle X-ray scattering analyses of the nanoparticles indicated that BNZ might be dispersed in the nanoparticle matrix in an amorphous state. The

• ] software showed a mean particle size of 150 ± 13 nm. Accordingly, the hydrodynamic diameter of the nanoparticles measured by dynamic light scattering (DLS) was in the 100–200 nm range (≈150 nm), with a moderate distribution of sizes as indicated by a polydispersity index (PdI) of 0.204. The zeta potential

Silver-based SERS substrates fabricated using a 3D printed microfluidic device

• Phommachith Sonexai,
• Minh Van Nguyen,
• Bui The Huy and
• Yong-Ill Lee

Beilstein J. Nanotechnol. 2023, 14, 793–803, doi:10.3762/bjnano.14.65

• [30]; also, it does not require a clean room. The stereolithography (SLA) technique is an additive manufacturing technique in which a photopolymer resin is cured and converted from a liquid to a solid by an ultraviolet laser. The resolution of SLA printers is determined by the radial beam scattering

Silver nanoparticles loaded on lactose/alginate: in situ synthesis, catalytic degradation, and pH-dependent antibacterial activity

• Nguyen Thi Thanh Tu,
• T. Lan-Anh Vo,
• T. Thu-Trang Ho,
• Kim-Phuong T. Dang,
• Van-Dung Le,
• Phan Nhat Minh,
• Chi-Hien Dang,
• Vinh-Thien Tran,
• Van-Su Dang,
• Tran Thi Kim Chi,
• Hieu Vu-Quang,
• Radek Fajgar,
• Thi-Lan-Huong Nguyen,
• Van-Dat Doan and
• Thanh-Danh Nguyen

Beilstein J. Nanotechnol. 2023, 14, 781–792, doi:10.3762/bjnano.14.64

• nanocomposite was then centrifuged and washed with distilled water. The purified nanocomposite was stored at 4 °C for further experiments. Characterizations of AgNPs@Lac/Alg nanocomposite The size distribution and stability of the nanocomposites were determined using dynamic light scattering (DLS) and zeta

Carboxylic acids and light interact to affect nanoceria stability and dissolution in acidic aqueous environments

• Matthew L. Hancock,
• Eric A. Grulke and
• Robert A. Yokel

Beilstein J. Nanotechnol. 2023, 14, 762–780, doi:10.3762/bjnano.14.63

• carboxylic acid dispersions Color change In the presence of light, the majority of the nanoceria dispersions changed color from light yellow to colorless (attributed to Ce4+ reduction to Ce3+) [47]. Nanoceria stored in the dark did not change color and remained light yellow. Dynamic light scattering (DLS

Current-induced mechanical torque in chiral molecular rotors

• Richard Korytár and
• Ferdinand Evers

Beilstein J. Nanotechnol. 2023, 14, 711–721, doi:10.3762/bjnano.14.57

• of freedom, assuming that the quantization levels of the rotational motion fall below the working temperature. Rotation only happens via inelastic electron tunneling. Importantly, each single electron scattering event must obey fundamental conservation laws. Therefore, the principles outlined in this

The microstrain-accompanied structural phase transition from h-MoO₃ to α-MoO₃ investigated by in situ X-ray diffraction

• Zeqian Zhang,
• Honglong Shi,
• Boxiang Zhuang,
• Minting Luo and
• Zhenfei Hu

Beilstein J. Nanotechnol. 2023, 14, 692–700, doi:10.3762/bjnano.14.55

• initial structural models. One model (MoO3·H2O) contains six water molecules, that is, the oxygen atom sites at (0 0 0.25) in the MoO6 octahedra tunnel (note that H atoms of the H2O molecules in the model were disregarded because of the low X-ray scattering ability). The other model (MoO3) does not

Investigations on the optical forces from three mainstream optical resonances in all-dielectric nanostructure arrays

• Guangdong Wang and
• Zhanghua Han

Beilstein J. Nanotechnol. 2023, 14, 674–682, doi:10.3762/bjnano.14.53

• supported, which are verified by the multipole decomposition analysis of the scattering power spectrum. Our numerical results show that the quasi-BIC resonance can produce a larger optical gradient force, which is about three orders of magnitude higher than those generated from the other two resonances. The

• two components (i.e., scattering force and gradient force [1]) and the motion of tiny particles within an optical field is determined by both of them. The scattering force originates from the photon momentum transferred to the particle caused by the scattering and absorption of photons. As a result

• , the scattering force is along the direction of light propagation, which is not conducive for object capturing. The gradient force is along the gradient direction of the non-uniform distribution of the light intensity in space, and is well-known for its application in optical tweezers [2]. Therein a

Thermal transport in kinked nanowires through simulation

• Alexander N. Robillard,
• Graham W. Gibson and
• Ralf Meyer

Beilstein J. Nanotechnol. 2023, 14, 586–602, doi:10.3762/bjnano.14.49

• additional scattering of phonons at boundaries and cause interesting effects due to phonon reflections [12][13][14]. These effects are typically not seen at the macroscopic scale, but instead reflect the sophisticated nature of transport and finite sizes at the nano- and mesoscales. Recently, there have been

• distances without scattering off a surface. With a small ratio, we must take into account the nature of phonon scattering and reflection into our model of heat transport. This idea ties in to the familiar Knudsen number, Kn = λ/L, with λ being some transport mean free path and L being a measurement of the

• ratio of the radius to the system length. It is common in low-dimensional systems to find unimpeded ballistic heat transport being suppressed in systems with small radii or long lengths. In such scenarios, few ballistic transit paths make it through without scattering against a system boundary; the

ZnO-decorated SiC@C hybrids with strong electromagnetic absorption

• Liqun Duan,
• Zhiqian Yang,
• Yilu Xia,
• Xiaoqing Dai,
• Jian’an Wu and
• Minqian Sun

Beilstein J. Nanotechnol. 2023, 14, 565–573, doi:10.3762/bjnano.14.47

• materials possess a large number of three-dimensional gaps, which are generated by the stacked one-dimensional SiC nanowires and the ZnO particles. These gaps can lead to reflection or scattering losses when the microwaves enter (Figure 7a). Second, conductivity losses can occur in the carbon shell on the

• at 12.1 GHz. They attributed the good performance to the synergy of several mechanisms, including multiple reflection and scattering losses generated by the porous structure and dielectric losses (such as interfacial polarization between ZnO and carbon or between Co and carbon, as well as between

• synergy of dielectric losses (including conductive loss and polarization relaxations) and multiple reflection or scattering losses, enabling a promising EM absorbing nanomaterial. XRD diffractograms of all samples. TEM images of all samples. (a) SCZ4; (b–f) SCZ3; (c–f) HRTEM images with corresponding FFT

SERS performance of GaN/Ag substrates fabricated by Ag coating of GaN platforms

• Magdalena A. Zając,
• Bogusław Budner,
• Malwina Liszewska,
• Bartosz Bartosewicz,
• Łukasz Gutowski,
• Jan L. Weyher and
• Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2023, 14, 552–564, doi:10.3762/bjnano.14.46

• increases significantly from 4.8 × 105 for PLD_1_RT to 6.6 × 105 for PLD_4_RT. The PLD_2_RT substrate is characterized by the highest EF (16.0 × 105) in the entire series of the discussed substrates, which may result from Raman scattering enhancement on the pillars and spiky structures on the surface of the

• ), these structures are covered by a thicker layer of Ag and become lower and less visible. As a result, their contribution to the Raman scattering signal enhancement is smaller. A comparison of signal standard deviations of the SERS spectra obtained for PLD-fabricated substrates made at room temperature

Observation of multiple bulk bound states in the continuum modes in a photonic crystal cavity

• Rui Chen,
• Yi Zheng,
• Xingyu Huang,
• Qiaoling Lin,
• Chaochao Ye,
• Meng Xiong,
• Martijn Wubs,
• Yungui Ma,
• Minhao Pu and
• Sanshui Xiao

Beilstein J. Nanotechnol. 2023, 14, 544–551, doi:10.3762/bjnano.14.45

• carried out to compensate for deviations between fabricated and designed values. To obtain devices with larger Q factors and higher scattering power, cavities with larger Na = 30 and Nb = 10 were fabricated. Optical and scanning electron microscopy (SEM) images are given in Figure 3a. A microscope was

• refitted to test the scattering spectrum of the sample, as illustrated in Figure 3b. The yellow and red lines represent the imaging and measurement optical paths in the microscope. The imaging light path was utilized to adjust the illuminating position on the sample. In the measurement light path, a

• polarization-dependent beam splitter (PBS) is added, not only to combine incident and reflection light, but also to filter out the co-polarization component with the incident light. Only the scattering light possessing both polarization components can partially pass the PBS and be detected by the spectrometer

On the use of Raman spectroscopy to characterize mass-produced graphene nanoplatelets

• Keith R. Paton,
• Konstantinos Despotelis,
• Naresh Kumar,
• Piers Turner and
• Andrew J. Pollard

Beilstein J. Nanotechnol. 2023, 14, 509–521, doi:10.3762/bjnano.14.42

• application areas as an in-line process analysis and control method [9][10][11][12]. Raman spectroscopy is particularly suited to the analysis of graphitic materials because of the large scattering cross section of graphitic materials and the large amount of information obtainable from a single measurement

The origin of black and white coloration of the Asian tiger mosquito Aedes albopictus (Diptera: Culicidae)

• Manuela Rebora,
• Gianandrea Salerno,
• Silvana Piersanti,
• Alexander Kovalev and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2023, 14, 496–508, doi:10.3762/bjnano.14.41

• , diffraction and scattering, that cause the selective reflection of light [3]. Quite often, structural colors are present together with pigment colors, to increase or to reduce the brightness and to produce particular effects [4]. Insect exoskeletons with their multilayered internal organisation and the

• illumination (Figure 6). Enhanced reflection at 30° detection and distal illumination (compared with proximal illumination) (Figure 6a,b) should be related to the tilt angle of the individual scales (Figure 3a). There is also relative strong light scattering on the thin scale surface structure (Figure 3c–e

• weakest at perpendicular illumination. In UV spectral range, the light scattering has no specific trends (corresponding to, e.g., Rayleigh scattering), though absorption by molecules with aromatic groups might modulate the reflection. There are no pigments in the white scales (Figure 5d), so interference

Conjugated photothermal materials and structure design for solar steam generation

• Chia-Yang Lin and
• Tsuyoshi Michinobu

Beilstein J. Nanotechnol. 2023, 14, 454–466, doi:10.3762/bjnano.14.36

• multilayer PPy nanosheets, and this results in internal light scattering between the layers (Figure 6d). These multilayer nanosheets promote a broadband and wide-angle light absorption across the entire solar spectrum, thus increasing the solar thermal conversion efficiency to 95.33%. Polyaniline

• scattering. After crosslinking PANI, the porous hydrogel sample exhibited a broader and stronger absorption (98.5%) than the pure PEGDA sample, especially in the visible and near-infrared regions. Polydopamine: Polydopamine (PDA) has shown great potential in the field of solar-driven desalination due to its