Nanoarchitectonics with cetrimonium bromide on metal nanoparticles for linker-free detection of toxic metal ions and catalytic degradation of 4-nitrophenol

• Akash Kumar and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 1312–1332, doi:10.3762/bjnano.15.106

• nanoparticles (AuNS, AuNR1, and AuNR2). The characteristic [C–H–Ag] vibration was missing, indicating the absence of C–H binding to the metal surface. The new minor peaks of CTAB-capped AgNS and AuNS at 828, 1004, and 1130 cm−1, which are not present in parent CTAB molecules, are also considered as stretching

Interaction of graphene oxide with tannic acid: computational modeling and toxicity mitigation in C. elegans

• Romana Petry,
• James M. de Almeida,
• Francine Côa,
• Felipe Crasto de Lima,
• Diego Stéfani T. Martinez and
• Adalberto Fazzio

Beilstein J. Nanotechnol. 2024, 15, 1297–1311, doi:10.3762/bjnano.15.105

• with TA for 24 h. Furthermore, the C–O related bands at 1180 and 1230 cm−1 in the spectra of TA and GO, respectively, appeared at 1215 cm−1 in the interacting system and had a decreased signal when GO was dispersed in EPA medium in absence of TA. The changes in the vibration energy of these chemical

• [45][46]. In the absence of TA, the modulation of the C=0 stretching vibration intensity may indicate coordination of the divalent metal ions Ca2+ and Mg2+ present in EPA medium [47]. The intensity ratio between ID and IG bands in Raman spectroscopy analysis ranges from 0.94 ± 0.01, for the GO sample

Mn-doped ZnO nanopowders prepared by sol–gel and microwave-assisted sol–gel methods and their photocatalytic properties

• Cristina Maria Vlăduț,
• Crina Anastasescu,
• Silviu Preda,
• Oana Catalina Mocioiu,
• Simona Petrescu,
• Jeanina Pandele-Cusu,
• Dana Culita,
• Veronica Bratan,
• Ioan Balint and
• Maria Zaharescu

Beilstein J. Nanotechnol. 2024, 15, 1283–1296, doi:10.3762/bjnano.15.104

• and MW) lies in the intensity of the vibration bands, which is twice as high in the sample synthesized via MW. This difference can be attributed to the influence of microwave irradiation on the reaction rates within the sol–gel solutions, leading to enhanced vibrational band intensity. Differential

• characteristic of organic groups after thermal treatment. Notably, the main vibration band of Zn–O–Mn is observed at 420 cm−1, as reported in previous studies [23]. The higher intensity of this band in the nanopowder synthesized via MW is evident. This increased band intensity at 420 cm−1 suggests enhanced

New design of operational MEMS bridges for measurements of properties of FEBID-based nanostructures

• Bartosz Pruchnik,
• Krzysztof Kwoka,
• Ewelina Gacka,
• Dominik Badura,
• Piotr Kunicki,
• Andrzej Sierakowski,
• Paweł Janus,
• Tomasz Piasecki and
• Teodor Gotszalk

Beilstein J. Nanotechnol. 2024, 15, 1273–1282, doi:10.3762/bjnano.15.103

• [38], but this technique is difficult to apply in SEM chambers (the ultimate working environment for opMEMS) because of the difficulty of obtaining a controlled magnetic field inside. In the experiments, the resonance of the opMEMS was measured outside the vacuum chamber using a SIOS nano vibration

• analyser to assess the properties of the active device. The measured level of vibration of the MEMS bridge at a known temperature allows its stiffness to be determined with an accuracy of 5% [38]. First, the thermomechanical noise of the structure vibration was measured, then the displacement of the

The role of a tantalum interlayer in enhancing the properties of Fe₃O₄ thin films

• Hai Dang Ngo,
• Vo Doan Thanh Truong,
• Van Qui Le,
• Hoai Phuong Pham and
• Thi Kim Hang Pham

Beilstein J. Nanotechnol. 2024, 15, 1253–1259, doi:10.3762/bjnano.15.101

• annealed at a temperature of 723 K for a duration of 2 h under a base pressure of 2.3 × 10−8 Torr. The Fe3O4 films were analyzed regarding their surface morphology, magnetic properties, and structural properties using atomic force microscopy (EasyScan2, Nanosurf), vibration sample magnetometry (Quantum

Photocatalytic methane oxidation over a TiO₂/SiNWs p–n junction catalyst at room temperature

• Qui Thanh Hoai Ta,
• Luan Minh Nguyen,
• Ngoc Hoi Nguyen,
• Phan Khanh Thinh Nguyen and
• Dai Hai Nguyen

Beilstein J. Nanotechnol. 2024, 15, 1132–1141, doi:10.3762/bjnano.15.92

• photocatalysts. As depicted in Figure 4a, the Raman spectrum of Si exhibits a single peak located at 519 cm−1, corresponding to the first-order transverse optical (TO) mode of Si [46]. For the TiO2/Si photocatalyst, two distinct peaks were observed, namely, (i) the characteristic Eg vibration of TiO2, located at

Effect of wavelength and liquid on formation of Ag, Au, Ag/Au nanoparticles via picosecond laser ablation and SERS-based detection of DMMP

• Sree Satya Bharati Moram,
• Chandu Byram and
• Venugopal Rao Soma

Beilstein J. Nanotechnol. 2024, 15, 1054–1069, doi:10.3762/bjnano.15.86

• the impact of different Raman excitation wavelengths, specifically 325, 532, and 633 nm. The prominent peaks of MS (810 cm−1) and DMMP (710 cm−1) molecules were observed in all cases, shown in Figure 11a and Figure 11b, respectively. The peak at 810 cm−1 is due to the stretching vibration of C–H [69

Facile synthesis of Fe-based metal–organic frameworks from Fe₂O₃ nanoparticles and their application for CO₂/N₂ separation

• Van Nhieu Le,
• Hoai Duc Tran,
• Minh Tien Nguyen,
• Hai Bang Truong,
• Toan Minh Pham and
• Jinsoo Kim

Beilstein J. Nanotechnol. 2024, 15, 897–908, doi:10.3762/bjnano.15.74

• -prepared M-100Fe@Fe2O3 samples. Characteristic peaks, including vibration bands in the region of 550 to 630 cm−1, were assigned to Fe–O bonds in the Fe2O3 structure [33], and a signal at 620 cm−1 was attributed to the vibration of Fe(III)–O bonds in oxo-centered trinuclear iron complexes (Fe3–O) within the

Intermixing of MoS₂ and WS₂ photocatalysts toward methylene blue photodegradation

• Maryam Al Qaydi,
• Nitul S. Rajput,
• Michael Lejeune,
• Abdellatif Bouchalkha,
• Mimoun El Marssi,
• Steevy Cordette,
• Chaouki Kasmi and
• Mustapha Jouiad

Beilstein J. Nanotechnol. 2024, 15, 817–829, doi:10.3762/bjnano.15.68

• 410 cm−1, respectively, for MoS2, 350 cm−1. It can be further resolved into two sub-peaks at 324 cm−1 and 351 cm−1, corresponding to the 2LA(M) and E12g modes, the A1g mode at 420 cm−1 for WS2, and the presence of combined vibration modes for the composite MoS2/WS2 as shown in Figure 1. Interestingly

Electrospun polysuccinimide scaffolds containing different salts as potential wound dressing material

• Veronika Pálos,
• Krisztina S. Nagy,
• Rita Pázmány,
• Krisztina Juriga-Tóth,
• Bálint Budavári,
• Judit Domokos,
• Dóra Szabó,
• Ákos Zsembery and
• Angela Jedlovszky-Hajdu

Beilstein J. Nanotechnol. 2024, 15, 781–796, doi:10.3762/bjnano.15.65

• main peaks of the PSI at 1709 cm−1 (νCO of –(OC)2N– asymmetric stretching vibration) and 1393 cm−1 (C–O bending vibration, δ) were perceptible [21][49]. FTIR images of the Sr(NO3)2 and 20 PSI + Sr(NO3)2 salts show that the characteristic peaks of this salt appeared in the salt-containing scaffold at

• of the peak. The 1338 and 1434 cm−1 peaks are attributed to the vibration of N–O, and the 810 cm−1 peak is accountable for the bending mode of NO3 [50]. At 1709 cm−1, the added Sr(NO3)2 salt caused a slight shift in the polymer peak. With the increasing salt concentration, the intensity of the peak

• increased, which was also observed by Sim and collaborators in the case of polymer electrolyte films containing LiCF3SO3 [51]. At 1634 cm−1, rising peaks also appeared as the concentration of salts increased. It was presumably the peak corresponding to bending vibration of water, H–O–H (Supporting

Elastic modulus of β-Ga₂O₃ nanowires measured by resonance and three-point bending techniques

• Annamarija Trausa,
• Sven Oras,
• Sergei Vlassov,
• Mikk Antsov,
• Tauno Tiirats,
• Andreas Kyritsakis,
• Boris Polyakov and
• Edgars Butanovs

Beilstein J. Nanotechnol. 2024, 15, 704–712, doi:10.3762/bjnano.15.58

• excitation signal was generated by a waveform generator (RIGOL DG4162). For each NW, a resonance at its fundamental frequency was visually observed in SEM (Tescan Lyra, Figure 6a). If the applied frequency coincided with the frequency of the natural vibration, mechanical resonance was created due to an

Enhancing higher-order modal response in multifrequency atomic force microscopy with a coupled cantilever system

• Wendong Sun,
• Jianqiang Qian,
• Yingzi Li,
• Yanan Chen,
• Zhipeng Dou,
• Rui Lin,
• Peng Cheng,
• Xiaodong Gao,
• Quan Yuan and
• Yifan Hu

Beilstein J. Nanotechnol. 2024, 15, 694–703, doi:10.3762/bjnano.15.57

• applied the bridge/cantilever coupled structure to microcantilevers with different sizes and found that the modal vibration shapes were all in accordance with the vibration characteristics of the coupled system; also, the modal frequencies and higher-order modal responses were enhanced. This indicates

• that the model has no special requirements for the cantilever size. The first two orders of the simulated modal vibration shapes for different sizes of microcantilevers are shown in Supporting Information File 1. Considering the need to scale up and experiment, we selected cantilevers of the same size

• response is highest near 38 μm. This is an approximate match to the scaled-up values of the macroscale cantilevers. This indicates that it is feasible to represent the microcantilever by studying the vibration characteristics of the macroscale cantilever. Experimental Experimental platform The macroscale

Gold nanomakura: nanoarchitectonics and their photothermal response in association with carrageenan hydrogels

• Nabojit Das,
• Vikas,
• Akash Kumar,
• Sanjeev Soni and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 678–693, doi:10.3762/bjnano.15.56

• stretching, respectively, as well as C–H scissoring of H3C–N+ at 1407–1463 cm−1. The peaks around 910–960 cm−1 featured C–N stretching of the surfactants as well as the bending of four CH2 groups at 718 cm−1. The C–H scissoring vibration of H3C–N+ and C–N+ stretching is relatively less intense and slightly

Functional fibrillar interfaces: Biological hair as inspiration across scales

• Guillermo J. Amador,
• Brett Klaassen van Oorschot,
• Caiying Liao,
• Jianing Wu and
• Da Wei

Beilstein J. Nanotechnol. 2024, 15, 664–677, doi:10.3762/bjnano.15.55

• outside world or determine body or appendage orientation [128]. Mechanosensation Hairs, as mechanical receptors, are capable of perceiving and distinguishing a multitude of external stimuli such as touch, vibration, or fluid flows [129][130]. The mechanosensation of hairs relies on the sensory cells at

• detecting the presence and alteration of chemicals [142], which differs from the way hairs sense touch and vibration. The binding of receptor proteins on sensory cells to chemicals in the air or solution initiates a sequence of biochemical reactions, resulting in the production of electrical signals, which

Exfoliation of titanium nitride using a non-thermal plasma process

• Priscila Jussiane Zambiazi,
• Dolores Ribeiro Ricci Lazar,
• Larissa Otubo,
• Rodrigo Fernando Brambilla de Souza,
• Almir Oliveira Neto and
• Cecilia Chaves Guedes-Silva

Beilstein J. Nanotechnol. 2024, 15, 631–637, doi:10.3762/bjnano.15.53

• is attributed to the vibration of heavy titanium ions around nitrogen vacancies, while the 592 cm−1 peak arises from nitrogen ion vibrations near titanium vacancies [22][23][24]. Remarkably, the Raman spectra for both bulk and exfoliated TiN samples are similar. This consistency suggests that the non

AFM-IR investigation of thin PECVD SiO_x films on a polypropylene substrate in the surface-sensitive mode

• Hendrik Müller,
• Hartmut Stadler,
• Teresa de los Arcos,
• Adrian Keller and
• Guido Grundmeier

Beilstein J. Nanotechnol. 2024, 15, 603–611, doi:10.3762/bjnano.15.51

• mode) and Figure 6 (surface-sensitive mode). The spectra are normalized for a better comparison. The contact mode AFM-IR spectra in Figure 5 show peaks according to CH3 asymmetric deformation vibration and CH2 bending at 1455 cm−1, CH3 symmetric deformation vibration at 1376 cm−1, and CH3 rocking bands

• underneath the SiOx layer, improved surface sensitivity is achieved for both samples. Upon a closer look at the spectra, the broad peak corresponding to the TO Si–O–Si vibration at 1080 cm−1 can be clearly identified and even dominate the overall spectra [23][26]. The peak at 1168 cm−1 corresponding to the

• hyperspectral image (Figure 7c) shows the ratio of the Si–O–Si stretching band at 1080 cm−1 (blue) and the absorption band according to the CH3 asymmetric deformation vibration and the CH2 bending at 1455 cm−1 (green). As expected, the intensity of the polypropylene peak over the full image is more intense. It

Vinorelbine-loaded multifunctional magnetic nanoparticles as anticancer drug delivery systems: synthesis, characterization, and in vitro release study

• Zeynep Özcan and
• Afife Binnaz Hazar Yoruç

Beilstein J. Nanotechnol. 2024, 15, 256–269, doi:10.3762/bjnano.15.24

• Instruments, UV-1800) at a wavelength of 268 nm. Magnetic properties of nanoparticles were evaluated by vibration sample magnetometry (VSM, Lake Shore, Model 7410) using field-induced magnetization measurements at 298 K. The average diameters of nanoparticles were determined using ImageJ (US National

• illustrated in Figure 3d. A study by Feng et al. noted a peak at 1259 cm–1 in the IR spectra of PDA/Fe3O4 NPs, attributed to the extension vibration of the C–O band. The obtained results are supported by the resemblance to the peak observed at 1221 cm−1 in this observation. Furthermore, the peaks observed at

• 1520 and 1595 cm–1 can be attributed to the stretching vibration of C–O units, which is further supported by the peak at 1221 cm–1 [48]. Studies in the literature have demonstrated that the coating of iron oxide nanoparticles, commonly employed in creating multifunctional particles with the capability

Modification of graphene oxide and its effect on properties of natural rubber/graphene oxide nanocomposites

• Nghiem Thi Thuong,
• Le Dinh Quang,
• Vu Quoc Cuong,
• Cao Hong Ha,
• Nguyen Ba Lam and
• Seiichi Kawahara

Beilstein J. Nanotechnol. 2024, 15, 168–179, doi:10.3762/bjnano.15.16

• removal of the –COOH group during GO modification. In the spectrum of GO, the absorption peak at 1624 cm−1 was ascribed to vibration of the C=O bonds on the ketone group [33]. Nevertheless, for GO-VTES(a) and GO-VTES(b), this absorption peak overlapped with the absorption peaks at 1600 cm−1, which

• appeared due to the appearance of C=C bonds in VTES [17]. In the fingerprint region, the absorption peaks at approx. 950 to 1300 cm−1 for GO were due to the vibration of C–O and C–OH bonds in GO. These absorption peaks decreased for GO-VTES(a) and increased for GO-VTES(b) after modification. The increased

• in these peaks for GO-VTES(b) was due to the asymmetrical vibration of Si–O–Si linkages in silica particles during modification. This suggested that the silica particles were more efficiently formed in basic conditions than in acidic conditions. Note that the absorption at 780 cm−1 was due to the

Assessing phytotoxicity and tolerance levels of ZnO nanoparticles on Raphanus sativus: implications for widespread adoptions

• Pathirannahalage Sahan Samuditha,
• Nadeesh Madusanka Adassooriya and
• Nazeera Salim

Beilstein J. Nanotechnol. 2024, 15, 115–125, doi:10.3762/bjnano.15.11

• the synthetic materials [26]. The bonding of Zn–O is in the range of 400–1090 cm−1 [27][28][29]. Therefore, the distinctive bands in the FTIR spectrum at 545–1040 cm−1 could be attributed to the stretching vibration of the metal oxide, which belongs to the ZnO metal group [27][28][29][30]. The peak at

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

• nanofiber scaffold. This was due to the O–H stretching vibration of the glycerol component in BBR NPs (Figure 2). Peculiarly, the absorption bands at 1646 cm−1 and 1506 cm−1, characteristic of the C=N+ double bond and the furyl group in the molecular structure of BBR, respectively, were only displayed in

• PLA nanofiber scaffold were found at 887, 1046, 1129, 1305, 1458, 1766, and 2948 cm−1 corresponding to the vibration of υC–COO stretching, υCα–Cβ stretching, rCH3 rocking, δCH bending, δCH3 asymmetric deformation, υC=O stretching, and υCH3 stretching modes [35][36]. In the case of BBR drug-loaded PLA

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

• from CUR within CUR-HSA-MPs. FTIR analyses were used to confirm the chemical binding of CUR to HSA (Figure 3A). The FTIR spectrum of CUR (blue line spectrum) demonstrated bands at 3501 cm−1 (broad, phenolic O–H stretching vibration), 1667 cm−1 (stretching vibrations of the benzene ring of CUR), 1513 cm

• −1 (C=O and C=C vibrations), and 1435 cm−1 (olefinic C–H bending vibration). The 1309 cm−1 band corresponds to the aromatic C–O stretching vibrations, while the C–O–C stretching vibrations were represented at 1020/951 cm−1 [35]. The characteristic adsorption bands of pure HSA (pink line spectrum) at

• 1644 and 1546 cm−1 indicated the vibration adsorption of amide I (C=O stretching) and amide II (C–N stretching and N–H bending vibrations), respectively. These are the main vibrational bands in the albumin backbone that formed the secondary structure of the protein. It is also seen that the absorption

Dual-heterodyne Kelvin probe force microscopy

• Benjamin Grévin,
• Fatima Husainy,
• Dmitry Aldakov and
• Cyril Aumaître

Beilstein J. Nanotechnol. 2023, 14, 1068–1084, doi:10.3762/bjnano.14.88

• ), driven by a Mimea scanning probe microscope (SPM) controller (SPECS-Nanonis). Topographic imaging is performed in FM mode (FM-AFM) in the attractive regime, with negative frequency shifts of a few Hz and vibration amplitudes of a few tens of nm. All experiments were performed with Pt/Ir coated silicon

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

• discernible shoulder at ca. 350 cm−1, a weak band centered at 170 cm−1, as well as a broad band centered at 475 cm−1 with a shoulder at ca. 525 cm−1. The band at a wavenumber of 525 cm−1 can plausibly be designated to the highest-frequency Si–P vibration as the Γ-point optical phonon of Si is positioned at

• parameters were reasonably close to that of [11] with a lattice parameter of 5.054 Å and bond length of 2.27 Å. The fully symmetric A1 vibration frequency was precisely determined in our calculations, while the others were off by up to ca. 34 cm−1 with respect to the experimental values. This discrepancy was

• annealed samples revealed a pronounced absorption band with a maximum at 490–494 cm−1 and a shoulder at ca. 525 cm−1, which is consistent with the earlier assignment of the IR-active T2 mode to the highest-frequency vibration (Figure 4). The synthesized Si3P4 NPs were oxidized on the surface during

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

• as interlayer anion is confirmed by the vibration bands centered at 1350 and 775 cm−1. Finally, peaks below 750 cm−1 are related to the Co/Al–O vibrational bands [13][46][47]. Overall, a CoAl-LDH containing carbonate as interlayer anion is observed. Interestingly, in the case of sample x25M, a shift

Industrial perspectives for personalized microneedles

• Remmi Danae Baker-Sediako,
• Benjamin Richter,
• Matthias Blaicher,
• Michael Thiel and
• Martin Hermatschweiler

Beilstein J. Nanotechnol. 2023, 14, 857–864, doi:10.3762/bjnano.14.70

• ) can add up to 50,000+ USD, and this price does not include the femtosecond laser or anti-vibration systems. Custom-built 2PP systems also require extensive optical expertise for the initial installation and are typically a major milestone for several doctoral students. In general, custom-built 2PP