A wearable nanoscale heart sound sensor based on P(VDF-TrFE)/ZnO/GR and its application in cardiac disease detection

• Yi Luo,
• Jian Liu,
• Jiachang Zhang,
• Yu Xiao,
• Ying Wu and
• Zhidong Zhao

Beilstein J. Nanotechnol. 2023, 14, 819–833, doi:10.3762/bjnano.14.67

• mechanical vibration signals into voltage signals, have become one of the primary materials for creating heart sound sensors [9]. Piezoelectric materials are essential components in heart sound auscultation equipment. When pressure is applied to piezoelectric materials, they generate a voltage, a phenomenon

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

• –H flexion in the amide (1500–1400 cm−1 is also the absorption range of the C=C in the benzyl group), 1357 cm−1 to the symmetric vibration of R–NO2, and 1141 cm−1 to C–N in the imidazole ring [26]. Myristyl myristate displayed peaks at 2913 and 2848 cm−1 corresponding to C–H of alkane, 1731–1184 cm−1

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

• vibrations of COO− groups, respectively [41]. Additionally, the peaks at 1034 and 826 cm−1 are attributed to the stretching vibration of C–OH groups and the bending vibration of –CH groups [42]. Based on these data, it can be inferred that the primary components of the nanocomposites are polysaccharides. To

In situ magnesiothermic reduction synthesis of a Ge@C composite for high-performance lithium-ion batterie anodes

• Ha Tran Huu,
• Ngoc Phi Nguyen,
• Vuong Hoang Ngo,
• Huy Hoang Luc,
• Minh Kha Le,
• Minh Thu Nguyen,
• My Loan Phung Le,
• Hye Rim Kim,
• In Young Kim,
• Sung Jin Kim,
• Van Man Tran and
• Vien Vo

Beilstein J. Nanotechnol. 2023, 14, 751–761, doi:10.3762/bjnano.14.62

• [37] from the oxidized outer layer of the Ge nanoparticles. The FTIR spectrum of BC-800 exhibits absorption bands at ca. 3500, 1400–1600, and 1000–1300 cm−1. The band in the high-wavenumber region is ascribed to the vibration of hydroxy O–H bonds [38]. The medium-wavenumber signals are assigned to the

Transferability of interatomic potentials for silicene

• Marcin Maździarz

Beilstein J. Nanotechnol. 2023, 14, 574–585, doi:10.3762/bjnano.14.48

• dampen the out-of-plane vibration mode, and flat silicene may be produced [3]. Hence, it was decided to include also this phase in the molecular calculations. Performance of interatomic potentials Computations were carried out using molecular statics and the fourteen interatomic potentials for silicon

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

• nonradiative relaxation of excited electrons to the ground state. Depending on the interaction mechanism, photothermal phenomena are classified into three categories, namely plasmonic local heating of metals, nonradiative relaxation of semiconductors, and thermal vibration relaxation of conjugated molecules

Plasmonic nanotechnology for photothermal applications – an evaluation

• A. R. Indhu,
• L. Keerthana and
• Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

• electronic, translation, vibration, and rotational transitions. The interaction time period of electromagnetic radiation with electrons is around 10−14 to 10−15 s. SPR falls within the regime of electronic transitions and, generally, electronic transitions can be interband as well as intraband transitions

• conductivity relaxation time with temperatures T larger than the Debye temperature Θ. The Debye temperature is the temperature of a crystal’s highest mode of vibration. The decay of the excited electrons (plasmons) is through either radiative relaxation (i.e., photon emission) or non-radiative relaxation. Non

• states [81]. Figure 13 illustrates the relaxation process of the phonon vibration for a better understanding of phonon dynamics. The electron–phonon coupling constant, which describes the potential of a material for undergoing lattice heating, is calculated by transient reflectivity studies, for example

Quercetin- and caffeic acid-functionalized chitosan-capped colloidal silver nanoparticles: one-pot synthesis, characterization, and anticancer and antibacterial activities

• Akif Hakan Kurt,
• Elif Berna Olutas,
• Fatma Avcioglu,
• Hamza Karakuş,
• Mehmet Ali Sungur,
• Cansu Kara Oztabag and
• Muhammet Yıldırım

Beilstein J. Nanotechnol. 2023, 14, 362–376, doi:10.3762/bjnano.14.31

• stretching. The very strong band at 1640 cm−1 corresponds to a conjugated C=O stretching vibration. The characteristic bands at 1600, 1523, and 1447 cm−1 were assigned to both aromatic and olefinic C=C stretching modes. The strong band at 1273 cm−1 is due to the in-plane bending of C–H bonds. The FTIR

A novel approach to pulsed laser deposition of platinum catalyst on carbon particles for use in polymer electrolyte membrane fuel cells

• Bogusław Budner,
• Wojciech Tokarz,
• Sławomir Dyjak,
• Andrzej Czerwiński,
• Bartosz Bartosewicz and
• Bartłomiej Jankiewicz

Beilstein J. Nanotechnol. 2023, 14, 190–204, doi:10.3762/bjnano.14.19

• vibration with an experimentally selected frequency and amplitude. Structure, morphology, and chemical composition The carbon material quality was evaluated based on Raman spectra. Raman measurements were performed using a commercial Renishaw InVia Reflex Raman microscope equipped with an EMCCD (1600 × 200

High–low Kelvin probe force spectroscopy for measuring the interface state density

• Ryo Izumi,
• Masato Miyazaki,
• Yan Jun Li and
• Yasuhiro Sugawara

Beilstein J. Nanotechnol. 2023, 14, 175–189, doi:10.3762/bjnano.14.18

• vibration cos 2πf0t, f0 ± fm components of the electrostatic force Fele,L(f0 ± fm) appear: When the electrostatic force is detected by the FM method, the electrostatic force Fele,L(f0 ± fm) is demodulated into the fm component of the frequency shift ΔfL(fm), which is expressed as where k is the spring

• consider the case in which the frequency of the AC bias voltage is higher than the cutoff frequency fc of the carrier transport between the interface and bulk states. We assume that the heterodyne FM method [21] is used and that an AC bias voltage with a high frequency near twice the vibration frequency of

• vibration cos2πf0t, the f0 + fm component of the electrostatic force Fele,H(f0 + fm) appears: In the depletion region, In the accumulation and inversion regions, In the FM method, the electrostatic force Fele,H(f0 + fm) is demodulated into the fm component of the frequency shift ΔfH(fm). The resulting fm

Two-step single-reactor synthesis of oleic acid- or undecylenic acid-stabilized magnetic nanoparticles by thermal decomposition

• Mykhailo Nahorniak,
• Pamela Pasetto,
• Jean-Marc Greneche,
• Volodymyr Samaryk,
• Sandy Auguste,
• Anthony Rousseau,
• Nataliya Nosova and
• Serhii Varvarenko

Beilstein J. Nanotechnol. 2023, 14, 11–22, doi:10.3762/bjnano.14.2

• , oleic acid, and undecylenic acid pure substances agree with those described in the literature [28][29]. At the beginning of the first stage (S0 Stage1 for each of the acids), one can observe peaks of iron(III) acetylacetonate in the spectra. The vibration bands of the carboxylate group νa (COO–) are

Photoelectrochemical water oxidation over TiO₂ nanotubes modified with MoS₂ and g-C₃N₄

• Phuong Hoang Nguyen,
• Thi Minh Cao,
• Tho Truong Nguyen,
• Hien Duy Tong and
• Viet Van Pham

Beilstein J. Nanotechnol. 2022, 13, 1541–1550, doi:10.3762/bjnano.13.127

• determined by using FTIR spectroscopy, as shown in Figure 3b. The formation of TiO2 on the Ti foil is indicated by the vibrations of the Ti–O bond in the wavenumber region from 450 to 750 cm−1 [47]. The bonding characteristics in the MoS2 material are presented by Mo–S vibration peaks between 1620 and 420 cm

A TiO₂@MWCNTs nanocomposite photoanode for solar-driven water splitting

• Anh Quynh Huu Le,
• Ngoc Nhu Thi Nguyen,
• Hai Duy Tran,
• Van-Huy Nguyen and
• Le-Hai Tran

Beilstein J. Nanotechnol. 2022, 13, 1520–1530, doi:10.3762/bjnano.13.125

• MWCNTs, a typical peak at 1559 cm−1 is attributed to the vibration of C=C groups, whereas the peaks at 536, 1343, and 3394 cm−1 correspond to the C–O–C, C–C–O, and OH groups, respectively, on the MWCNTs [23]. For TiO2, a broad peak at 3404 cm−1 is attributed to the OH stretching, and another broad peak

• at 621 cm−1 is assigned to the Ti–O and Ti–O–Ti stretching of TiO2 [24]. In addition, the spectrum of TiO2@MWCNTs shows the characteristic peak at 972 cm−1 of the vibration of Ti–O–C groups, indicating the formation of a covalent bond between TiO2 and MWCNTs [24]. The UV–vis diffuse reflectance

In search of cytotoxic selectivity on cancer cells with biogenically synthesized Ag/AgCl nanoparticles

• Mitzi J. Ramírez-Hernández,
• Mario Valera-Zaragoza,
• Omar Viñas-Bravo,
• Ariana A. Huerta-Heredia,
• Miguel A. Peña-Rico,
• Erick A. Juarez-Arellano,
• David Paniagua-Vega,
• Eduardo Ramírez-Vargas and
• Saúl Sánchez-Valdes

Beilstein J. Nanotechnol. 2022, 13, 1505–1519, doi:10.3762/bjnano.13.124

• flavonoids, terpenes, tannins, and gallic acid; 1230 cm−1 corresponds to the tension of tertiary alcohols and flavonoids; 1026 cm−1 is related to C–O vibration in tannins and flavonoids; and 918 cm−1, 865 cm−1, and 705 cm−1 correspond to out-of-plane C–H vibration in gallic acid and catechin. According to

Studies of probe tip materials by atomic force microscopy: a review

• Ke Xu and
• Yuzhe Liu

Beilstein J. Nanotechnol. 2022, 13, 1256–1267, doi:10.3762/bjnano.13.104

• (shell) covered nanotubes to produce reinforced carbon–carbon composite nanotools; combining amorphous carbon with the extreme mechanical properties of CNTs can facilitate the production of nanotools with high aspect ratios. Inappropriate properties such as vibration and flexibility can be controlled

A cantilever-based, ultrahigh-vacuum, low-temperature scanning probe instrument for multidimensional scanning force microscopy

• Hao Liu,
• Zuned Ahmed,
• Sasa Vranjkovic,
• Manfred Parschau,
• Andrada-Oana Mandru and
• Hans J. Hug

Beilstein J. Nanotechnol. 2022, 13, 1120–1140, doi:10.3762/bjnano.13.95

• suspension springs that reach through cylindrical tubes running through the LHe tank and are mounted on top of the tank. Together with the Eddy current damping system mounted at the bottom of the cryostat, this provides excellent vibration isolation such that a tip–sample gap stability better than 1 pm can

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

• Aisha Kanwal,
• Naheed Bibi,
• Sajjad Hyder,
• Arif Muhammad,
• Hao Ren,
• Jiangtao Liu and
• Zhongli Lei

Beilstein J. Nanotechnol. 2022, 13, 1068–1107, doi:10.3762/bjnano.13.93

Temperature and chemical effects on the interfacial energy between a Ga–In–Sn eutectic liquid alloy and nanoscopic asperities

• Yujin Han,
• Pierre-Marie Thebault,
• Corentin Audes,
• Xuelin Wang,
• Haiwoong Park,
• Jian-Zhong Jiang and
• Arnaud Caron

Beilstein J. Nanotechnol. 2022, 13, 817–827, doi:10.3762/bjnano.13.72

• force–distance curve with each cantilever on a quartz glass sample (manufactured by Goodfellow, United Kingdom) and extracting its slope in the range of repulsive forces. Subsequently, we determined the bending stiffness Cn of each cantilever by analyzing its thermal noise vibration [18]. After

Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production

• Chun-Da Liao,
• Andrea Capasso,
• Tiago Queirós,
• Telma Domingues,
• Fatima Cerqueira,
• Nicoleta Nicoara,
• Jérôme Borme,
• Paulo Freitas and
• Pedro Alpuim

Beilstein J. Nanotechnol. 2022, 13, 796–806, doi:10.3762/bjnano.13.70

• ± 3.0 cm−1 (Figure 2f,i), implying high-quality monolayer graphene. Together, the data further support uniformity and crystallinity of the sample. The G phonon band arises from double degeneracy of iTO and iLO phonon modes (E2g symmetry) at the Brillouin zone center, which is an in-plane vibration of

Hierarchical Bi₂WO₆/TiO₂-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants

• Zehao Lin,
• Zhan Yang and
• Jianguo Huang

Beilstein J. Nanotechnol. 2022, 13, 745–762, doi:10.3762/bjnano.13.66

• TiO2-NT, and pure Bi2WO6 powder samples, where all present two similar absorption bands at 1625 and 3420 cm−1 which can be indexed to the stretching vibration of adsorbed H2O and –OH group on the sample surface [37]. Apart from the 30%−Bi2WO6/TiO2-NT nanocomposite, the FTIR spectra of the other Bi2WO6

• /TiO2-NT nanocomposites all exhibit three apparent absorption bands at approx. 555, 736, and 1077 cm−1, which are indexed to the stretching vibrations of Bi−O and W−O covalent bonds and to the bridge stretching vibration of the W−O−W bond in the Bi2WO6 phase, respectively [38]. All the FTIR spectra of

• the Bi2WO6/TiO2-NT nanocomposites display bands centered at approx. 480 cm−1 which are assigned to the Ti−O stretching vibration in the TiO2 phase except for the 90%−Bi2WO6/TiO2-NT nanocomposite [39]. The FTIR spectrum of the pure Bi2WO6 powder exhibits similar absorption bands to those of the 90

A nonenzymatic reduced graphene oxide-based nanosensor for parathion

• Sarani Sen,
• Anurag Roy,
• Ambarish Sanyal and
• Parukuttyamma Sujatha Devi

Beilstein J. Nanotechnol. 2022, 13, 730–744, doi:10.3762/bjnano.13.65

• cm−1 corresponding to the O–H stretching vibration originating from carboxyl groups. Besides, an intense peak at 1641 cm−1 was assigned to the C=O stretching of carboxyl and/or carbonyl groups, a sharp peak at 1387 cm−1 corresponding to a –OH bend, and a strong peak at 1068 cm−1 ascribed to an alkoxy

• and/or epoxy C–O stretching vibration. The significant reduction of the FTIR signal intensity of ERGO for –OH, –C=O, and –C–O suggests the successful formation of ERGO due to the electrochemical deoxygenation of GO, which corroborates the Raman analysis. Figure 1D depicts a characteristic XRD peak of

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

• Raman intensities, respectively. The integrated photoluminescence intensities are plotted in the range of 750 to 850 nm, and the Raman intensities are the integrated peak area from the vibration mode of CuPc at 1527 cm−1. Three regions are marked in Figure 2d and Figure 2e as the border (R1), border to

• 1527 cm−1 are assigned to the C–C and N–C stretching vibrations of the isoindole ring [34][35]. The 746 cm−1 vibrational mode originates from the metal-bound N–M stretching vibration, and the 1138 cm−1 mode is attributed to the deformation of the isoindole ring system [36]. The Raman enhancement factor

• () in Equation 1, which increases the electron transition probability rate (wlk) [21]. In particular, the vibration mode (746 cm−1) that is assigned to the metal-bound N–M stretching vibration shows a larger intrinsic dipole, leading to a dipole–dipole interaction with the Mo–Se bond of MoSe2. Thus, the

Detection and imaging of Hg(II) in vivo using glutathione-functionalized gold nanoparticles

• Gufeng Li,
• Shaoqing Li,
• Rui Wang,
• Min Yang,
• Lizhu Zhang,
• Yanli Zhang,
• Wenrong Yang and
• Hongbin Wang

Beilstein J. Nanotechnol. 2022, 13, 549–559, doi:10.3762/bjnano.13.46

• the GSH and Rh6G2 were successfully bound to the surface of GNPs. FTIR spectra of GNPs, GSH, GNPs-GSH, and GNPs-GSH-Rh6G2 are presented in Figure 2e. As citrate ions are attached on the surface of GNP, C=O, and C–O stretching vibration modes occur at 1655 and 1443 cm−1, respectively. The peaks of GSH

• at 1650 and 1400 cm−1 were found in the IR spectrum of GNPs-GSH, which was attributed to the stretching vibration and the asymmetric stretching vibration of –COO−. The stretching vibration of S–H disappeared in GNPs-GSH due to the formation of Au–S bonds [47]. These results proved that GSH was

Influence of thickness and morphology of MoS₂ on the performance of counter electrodes in dye-sensitized solar cells

• Lam Thuy Thi Mai,
• Hai Viet Le,
• Ngan Kim Thi Nguyen,
• Van La Tran Pham,
• Thu Anh Thi Nguyen,
• Nguyen Thanh Le Huynh and
• Hoang Thai Nguyen

Beilstein J. Nanotechnol. 2022, 13, 528–537, doi:10.3762/bjnano.13.44

• characterized by Raman spectroscopy. The Raman spectrum of the MoS2/FTO sample showed the characteristic peaks of the 2H and 1T phases of MoS2 (Figure 4b). The appearance of the J1, J2, and J3 peaks around 150, 226, and 326 cm−1 confirmed the presence of the 1T metallic phase. Whereas the two Raman vibration

A chemiresistive sensor array based on polyaniline nanocomposites and machine learning classification

• Jiri Kroutil,
• Alexandr Laposa,
• Ali Ahmad,
• Jan Voves,
• Vojtech Povolny,
• Ladislav Klimsa,
• Marina Davydova and
• Miroslav Husak

Beilstein J. Nanotechnol. 2022, 13, 411–423, doi:10.3762/bjnano.13.34

• +, characteristic band of the polaron radical cation); (6) 1412 cm−1 (phenazine structures); (7) 1498 cm−1 (C=N of the quinoid nonprotonated diimine units); (8) 1590 cm−1 (C=C stretching vibration of the quinonoid ring) [16][17]. Current–voltage and temperature analysis Figure 3 shows current–voltage