Controllable physicochemical properties of WO_x thin films grown under glancing angle

• Rupam Mandal,
• Aparajita Mandal,
• Alapan Dutta,
• Rengasamy Sivakumar,
• Sanjeev Kumar Srivastava and
• Tapobrata Som

Beilstein J. Nanotechnol. 2024, 15, 350–359, doi:10.3762/bjnano.15.31

• , heterostructures having an n-type WOx layer on various p-type substrates such as p-Si [12][13], Cu2O [14], NiO [15], p-ZnO nanowires (NWs) [16], diamond [17], and BiVO4 [18], have a great technological importance in the field of heterojunction solar cells, LEDs, and resistance random access memory (RRAM) devices

Exploring the relationships between physiochemical properties of nanoparticles and cell damage to combat cancer growth using simple periodic table-based descriptors

• Joyita Roy and
• Kunal Roy

Beilstein J. Nanotechnol. 2024, 15, 297–309, doi:10.3762/bjnano.15.27

• stability based on the aggregation phenomenon. This is well observed in MeOx NPs, where an increase in the oxidation number (χox) decreases the zeta potential. In WO3 NPs, the χox value is 6 and the zeta potential value is −23 mV; for NiO NPs, the χox value is 2, and the zeta potential value is 34.4 mV. The

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

• , these methods still face problems, including the requirements of controlling defects, scale-up for mass production, or troubles relating to decoration uniformity [31][32]. Another method is to form heterojunctions of ZnO and other narrow-bandgap semiconductors (NiO [33], PbS [34], CdS [35], and MoS2[36

Evaluation of electrosynthesized reduced graphene oxide–Ni/Fe/Co-based (oxy)hydroxide catalysts towards the oxygen evolution reaction

• Karolina Cysewska,
• Marcin Łapiński,
• Marcin Zając,
• Jakub Karczewski,
• Piotr Jasiński and
• Sebastian Molin

Beilstein J. Nanotechnol. 2023, 14, 420–433, doi:10.3762/bjnano.14.34

• and/or GO. For example, Wu et al. [13] chemically fabricated metal alloys and their oxides (NiCo, CoFe) with nitrogen-doped graphene (N-rGO/NiCo-NiO-CoO, N-rGO/CoFe-Co2FeO4) on a glassy carbon electrode (GCE). The N-rGO/NiCo-NiO-CoO and N-rGO/CoFe-Co2FeO4 catalysts revealed an OER overpotential (η) of

• 260 mV (Tafel slope: 72 mV·dec−1) and 320 mV (65 mV∙dec−1) determined at 10 mA·cm−2 in 1 M potassium hydroxide (KOH), respectively. In another work, nickel/nickel oxide (Ni-NiO) and cobalt/cobalt oxide (Co-CoO) were chemically synthesized with three-dimensional hierarchical porous graphene (3DHPG) on

• a GCE [24]. Ni-NiO @3DHPG exhibited an OER onset potential Eonset of 1.53 V vs RHE, η of 164 mV, and a Tafel slope of 55 mV∙dec−1, while Co-CoO@3DHPG revealed an Eonset of 1.59 V vs RHE, η of 168 mV, and a Tafel slope of 65 mV∙dec−1 determined in 1 M KOH. In the work of Xia et al. [20], an efficient

Solar-light-driven LaFe_xNi_1−xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

• Chao-Wei Huang,
• Shu-Yu Hsu,
• Jun-Han Lin,
• Yun Jhou,
• Wei-Yu Chen,
• Kun-Yi Andrew Lin,
• Yu-Tang Lin and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 882–895, doi:10.3762/bjnano.13.79

• °, JCPDS Card #011-0557), NiO (37.3°, 43.3°, JCPDS Card #04-0835), and La2O2CO3 (13.1°, 22.8°, 29.6°, 31.3°, JCPDS Card #23-0322) signals, respectively [40]. The sample calcined at 500 °C exhibited the more apparent signals belonging to La2O2CO3 and NiO. The signal of LaNiO3 did not appear for LaNiO3-500

A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

• Irena Mihailova,
• Vjaceslavs Gerbreders,
• Marina Krasovska,
• Eriks Sledevskis,
• Valdis Mizers,
• Andrejs Bulanovs and
• Andrejs Ogurcovs

Beilstein J. Nanotechnol. 2022, 13, 424–436, doi:10.3762/bjnano.13.35

• ., Co2O3, TiO2, NiO, and Fe2O3). SEM images of copper oxide samples. (a, b) General view and morphology of a CuO film obtained by thermal oxidation on a copper wire; (c, d) general view of a copper wire with CuO layer obtained by chemical hydrothermal oxidation; (e) 3D flower-like nanostructured formations

Investigation of a memory effect in a Au/(Ti–Cu)Ox-gradient thin film/TiAlV structure

• Damian Wojcieszak,
• Jarosław Domaradzki,
• Michał Mazur,
• Tomasz Kotwica and
• Danuta Kaczmarek

Beilstein J. Nanotechnol. 2022, 13, 265–273, doi:10.3762/bjnano.13.21

• a much wider (several hundred nanometers) semiconducting (e.g., doped or nonstoichiometric oxide) layer. Materials used either for insulating or semiconducting layers include HfO2 [3][15][16][17][18], ZnO [19][20], CuO [21][22][23][24][25][26][27], ZrO2 [12], Ta2O5 [28][29], and NiO [3][30][31][32

A comprehensive review on electrospun nanohybrid membranes for wastewater treatment

• Senuri Kumarage,
• Imalka Munaweera and
• Nilwala Kottegoda

Beilstein J. Nanotechnol. 2022, 13, 137–159, doi:10.3762/bjnano.13.10

Morphology-driven gas sensing by fabricated fractals: A review

• Vishal Kamathe and
• Rupali Nagar

Beilstein J. Nanotechnol. 2021, 12, 1187–1208, doi:10.3762/bjnano.12.88

• -like structure of nanoscale Zn-doped nickel oxide dendritic crystals by an electrolytic method with high-temperature oxidation for the detection of NH3 at room temperature. Zn-doped NiO dendritic crystals at the nanoscale consisted of a major elongated stem having numerous secondary and tertiary

• branches. The dendritic nanostructure allowed the network passage for electron transfer after ammonia molecules interact with the sensing surface. It showed an about 5–8 times enhanced response and an improvement in recovery time by about 30–50 times compared to a pristine NiO sensor. The sensor also

• showed good reproducibility, high stability, and selectivity towards ammonia over other gases. In 2015, Zhao et al. reported dandelion-like NiO hierarchical structures assembled with dendritic elements (ca. 1.8 µm) synthesized via a surfactant-free one-step hydrothermal route [86]. The dandelion-like NiO

pH-driven enhancement of anti-tubercular drug loading on iron oxide nanoparticles for drug delivery in macrophages

• Karishma Berta Cotta,
• Sarika Mehra and
• Rajdip Bandyopadhyaya

Beilstein J. Nanotechnol. 2021, 12, 1127–1139, doi:10.3762/bjnano.12.84

• vibration at 1734.5 (Supporting Information File 1, Figure S1). Such peak shifts are also observed when NOR interacts with metal ions like NiO [41]. The zeta potential of these particles was found to be +29 mV, validating the loading of drug and indicating nanoparticle stability at neutral pH

• profile from NOR@IONPpH10 resembled that of free NOR where the release was rapid over the first 4–6 h and saturated out there after (Figure 5b, inset). The release of NOR from metal oxides, NiO, is found to follow first order rate kinetics thus we too fitted out drug release plots to a first order model

Assessment of the optical and electrical properties of light-emitting diodes containing carbon-based nanostructures and plasmonic nanoparticles: a review

• Keshav Nagpal,
• Erwan Rauwel,
• Frédérique Ducroquet and
• Protima Rauwel

Beilstein J. Nanotechnol. 2021, 12, 1078–1092, doi:10.3762/bjnano.12.80

• in the EML of blue light-emitting diode [107]. A very high improvement in the current efficiency compared to the device without Ag nanocubes was noted. Shi et al. in a report, have introduced AuNP in the MgZnO QD layer with a device structure of p-NiO/CsPbBr3/MgZnO/AuNP/n-ZnO film/n-GaN (Figure 9b

Nanogenerator-based self-powered sensors for data collection

• Yicheng Shao,
• Maoliang Shen,
• Yuankai Zhou,
• Xin Cui,
• Lijie Li and
• Yan Zhang

Beilstein J. Nanotechnol. 2021, 12, 680–693, doi:10.3762/bjnano.12.54

• to the test gas. The sensitivity of above ZnO-based self-powered sensor is 127.3% under 1000 ppm H2S. The piezoelectric output of sensor decreased with increase of the concentration of the tested gas, as shown in Figure 5e. In 2016, a self-powered gas sensor based on a NiO/ZnO heterojunction nanowire

• array showed high sensitivity and fast response [19]. At room temperature, the piezoelectric voltage of the NiO/ZnO NW array was reduced from 0.388 V (in dry air) to 0.061 V (at 1000 ppm H2S), and the response was approximately 10 times that of naked the ZnO NW array. An In2O3/ZnO heterostructure was

Influence of electrospray deposition on C₆₀ molecular assemblies

• Antoine Hinaut,
• Sebastian Scherb,
• Sara Freund,
• Zhao Liu,
• Thilo Glatzel and
• Ernst Meyer

Beilstein J. Nanotechnol. 2021, 12, 552–558, doi:10.3762/bjnano.12.45

• method can yield single isolated molecules accompanied by surface modifications. Keywords: alkali halide; Au(111); bulk insulator; C60; electrospray; electrospray deposition; fullerene; high-vacuum electrospray deposition (HV-ESD); molecular assembly; nc-AFM; NiO; single molecule; thermal evaporation

• used as model surface in nc-AFM measurements [31][32][33][34], and, finally, NiO(001), a p-type wide-bandgap metal oxide with potential applications in photovoltaics [35][36][37]. For all cases, we show the typical C60 structures formed by TE and compare these with the results from HV-ESD. This allows

• molecular trapping and their creation is therefore studied for those reasons [32][43][45][46]. In HV-ESD deposition, their presence can be reduced but not inhibited without annealing of the surface [44]. C60 on NiO(001) surface NiO is a wide-bandgap metal oxide with potential applications in organic

Nickel nanoparticle-decorated reduced graphene oxide/WO₃ nanocomposite – a promising candidate for gas sensing

• Ilka Simon,
• Alexandr Savitsky,
• Rolf Mülhaupt,
• Vladimir Pankov and
• Christoph Janiak

Beilstein J. Nanotechnol. 2021, 12, 343–353, doi:10.3762/bjnano.12.28

• –carbon composite (Ni@rGO). Previous work with WO3 had used either NiO (as part of the WO3 lattice), solely carbon, Pd-surface decorated WO3 (Pd@WO3), or Pd or Pt@carbon@WO3. We demonstrate the gas response for pure WO3, rGO/WO3 and Ni@rGO/WO3 sensing elements towards NO2 and acetone in air as well as

• -type MOS and an n-type MOS (p–n heterojunctions) [6][18]. The p-type MOS NiO is not a very popular gas sensing material, because p-type MOS have, in general, a lower gas response than n-type MOS, such as WO3, ZnO, or SnO2 [22][23]. But p-type MOS are ideal doping agents [24]. NiO combined with WO3

• , which leads to a rapid electron transfer from the surface reaction of the target gas with the MOS to the electrodes [35]. Additionally, MOS and graphene can form junctions at their interface. For example, p–p homojunctions can be formed between NiO and rGO to increase the gas sensing responsivity and

ZnO and MXenes as electrode materials for supercapacitor devices

• Ameen Uddin Ammar,
• Ipek Deniz Yildirim,
• Feray Bakan and
• Emre Erdem

Beilstein J. Nanotechnol. 2021, 12, 49–57, doi:10.3762/bjnano.12.4

• increased capacitance of 226 F·g−1 at 1 A·g-1 [22]. Xia et al. used a Ti3C2Tx MXene electrode decorated with nickel oxide (NiO) nanosheets. The electrode was synthesized via a hydrothermal method. The electrode used in a supercapacitor showed an excellent specific capacitance of 80 F·g−1 and an energy

Unravelling the interfacial interaction in mesoporous SiO₂@nickel phyllosilicate/TiO₂ core–shell nanostructures for photocatalytic activity

• Bridget K. Mutuma,
• Xiluva Mathebula,
• Isaac Nongwe,
• Bonakele P. Mtolo,
• Boitumelo J. Matsoso,
• Rudolph Erasmus,
• Zikhona Tetana and
• Neil J. Coville

Beilstein J. Nanotechnol. 2020, 11, 1834–1846, doi:10.3762/bjnano.11.165

• hydroxy groups bonded to nickel atoms (δ(NiO–H) band) in NiPS as multiple peaks were recorded between 630 and 710 cm−1 [57]. XPS analysis of mSiO2@NiPS and mSiO2@NiPS/TiO2 X-ray photoelectron spectroscopy (XPS) was used to study the surface composition of mSiO2@NiPS and mSiO2@NiPS/TiO2. The complete scans

• 2p3/2 binding energies for 1:1 phyllosilicates compared to that of 2:1 phyllosilicates [59][60]. Moreover, no peak originating from NiO (which has a lower binding energy at Ni 2p3/2 levels of less than 855 eV) was observed. This was confirmed by the appearance of the satellite splitting peaks with a

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

• Matías Guerrero Correa,
• Fernanda B. Martínez,
• Cristian Patiño Vidal,
• Camilo Streitt,
• Juan Escrig and
• Carol Lopez de Dicastillo

Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129

• photocatalytic, electrochemical, and catalytic properties. Furthermore, NiO NPs exhibit anti-inflammatory properties, generating interest in the biomedical field to use these NPs as antibiotics or in cancer treatments [116][133]. NiO NPs synthesized from Eucalyptus globulus leaf extract showed excellent

• antibacterial activities against E. coli, P. aeruginosa, methicillin-sensitive and resistant S. aureus [117]. Suganya et al. (2018) developed a potent antifungal nanocomposite with NiO NPs against the Aspergillus niger strain. The authors attributed the excellent antifungal properties to the physical process

Nickel nanoparticles supported on a covalent triazine framework as electrocatalyst for oxygen evolution reaction and oxygen reduction reactions

• Secil Öztürk,
• Yu-Xuan Xiao,
• Dennis Dietrich,
• Beatriz Giesen,
• Juri Barthel,
• Jie Ying,
• Xiao-Yu Yang and
• Christoph Janiak

Beilstein J. Nanotechnol. 2020, 11, 770–781, doi:10.3762/bjnano.11.62

• current density of 0.25 mA/cm2 at 1.70 V (vs RHE) [53][54]. The OER activity of Ni oxide and hydroxides in combination with carbon materials is ambiguous. NiO nanoparticles have an overpotential of 331 mV at 10 mA/cm2 (vs RHE) [55], which increases to 422 mV at 10 mA/cm2 (vs RHE) for a NiO nanoarray grown

Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes

• Wei Fang,
• Liang Yu and
• Lan Xu

Beilstein J. Nanotechnol. 2020, 11, 631–650, doi:10.3762/bjnano.11.50

• electrospinning and observed their photocatalytic performance. Yuan et al. [35] obtained TiO2/WO3 CNFs using electrospinning and applied them in the photocatalytic removal of mercury. Teng et al. [36] prepared TiO2/NiO CNFs by electrospinning and used them for photocatalysis. Polyacrylonitrile (PAN) has been

Facile synthesis of carbon nanotube-supported NiO//Fe₂O₃ for all-solid-state supercapacitors

• Shengming Zhang,
• Xuhui Wang,
• Yan Li,
• Xuemei Mu,
• Yaxiong Zhang,
• Jingwei Du,
• Guo Liu,
• Xiaohui Hua,
• Yingzhuo Sheng,
• Erqing Xie and
• Zhenxing Zhang

Beilstein J. Nanotechnol. 2019, 10, 1923–1932, doi:10.3762/bjnano.10.188

• mAh·g−1 at 2 A·g−1 with a capacitance retention of 40% at 40 A·g−1. The obtained CC-CNT@NiO cathode exhibits a high capacity of 527 mAh·g−1 at 2 A·g−1 and an excellent rate capability with a capacitance retention of 78% even at 40 A·g−1. The all-solid-state asymmetric supercapacitor fabricated with

• are widely used in commercial supercapacitors [6][7][8][9]. Although they have a higher capacity than the conventional capacitors, their average energy density is low to about 10 Wh·kg−1 whereas batteries reach 200 Wh·kg−1. Transition metal oxides such as RuO2, MnO2, NiO, and Fe2O3 [10][11][12][13][14

• this method to prepare CNT@NiO composites. NiO is a potential positive material offering high theoretical capacity, nontoxicity, and environmentally benign nature [25]. Through aqueous reduction, Fe2O3-coated CNT on carbon cloth (CC-CNT@Fe2O3) as anode and NiO-coated CNT on carbon cloth (CC-CNT@NiO) as

Alloyed Pt₃M (M = Co, Ni) nanoparticles supported on S- and N-doped carbon nanotubes for the oxygen reduction reaction

• Stéphane Louisia,
• Yohann R. J. Thomas,
• Pierre Lecante,
• Marie Heitzmann,
• M. Rosa Axet,
• Pierre-André Jacques and
• Philippe Serp

Beilstein J. Nanotechnol. 2019, 10, 1251–1269, doi:10.3762/bjnano.10.125

• deconvoluted spectrum indicates that most of the Ni is present under oxidized states. In this area, doublets corresponding to NiO, Ni(OH)2 and Ni(OOH) can be observed at 854.3/873.3 eV, 856.0/874.3 eV, and 857.6/874.6 eV, respectively [96]. The important concentration of oxidized species is generally observed

Comparing a porphyrin- and a coumarin-based dye adsorbed on NiO(001)

• Sara Freund,
• Antoine Hinaut,
• Nathalie Marinakis,
• Edwin C. Constable,
• Ernst Meyer,
• Catherine E. Housecroft and
• Thilo Glatzel

Beilstein J. Nanotechnol. 2019, 10, 874–881, doi:10.3762/bjnano.10.88

• -layered islands on a NiO(001) single crystal surface have been studied by means of non-contact atomic force microscopy at room temperature. Comparison of both island types reveals different adsorption and packing of each dye, as well as an opposite charge-transfer direction, which has been quantified by

• Kelvin probe force microscopy measurements. Keywords: coumarin; Kelvin probe force microscopy; metal oxide; molecular resolution; nickel oxide (NiO); non-contact atomic force microscopy; porphyrin; Introduction With regard to its use in dye-sensitized solar cells (DSSCs), the wide-bandgap n-type

• -bandgap p-type semiconductors, such as NiO, and their functionalization with sensitizers, have been less extensively studied by using SPM [12][13][14][15]. NiO was the first reported p-type wide-bandgap semiconductor [16], and can be used for the fabrication of p-type DSSCs with photoactive cathodes, a

A Ni(OH)₂ nanopetals network for high-performance supercapacitors synthesized by immersing Ni nanofoam in water

• Donghui Zheng,
• Man Li,
• Yongyan Li,
• Chunling Qin,
• Yichao Wang and
• Zhifeng Wang

Beilstein J. Nanotechnol. 2019, 10, 281–293, doi:10.3762/bjnano.10.27

• , respectively. The highest energy density in this work is comparable to that of a Ni@Ni(OH)2//graphene-CNT hybrid SC device (33.9 mWh/cm3 at a power density of 0.2 W/cm3) [50] and better than that of our previous NiO/np-Ni/MG symmetric supercapacitor device (19.82 mWh/cm3 at 0.4 W/cm3) [51]. This volumetric

Graphene-enhanced metal oxide gas sensors at room temperature: a review

• Dongjin Sun,
• Yifan Luo,
• Marc Debliquy and
• Chao Zhang

Beilstein J. Nanotechnol. 2018, 9, 2832–2844, doi:10.3762/bjnano.9.264

• formation of C–O–Sn chemical bonds, confirmed by XPS results, was responsible for the superior performance of the SnO–graphene sensor. Zhang et al. [94] fabricated a room-temperature NiO–graphene sensor that exhibited a better sensitivity to NO2 than a pure NiO sensor. The authors also ascribed the enhanced

• sensor sensitivity to the Ni–O–C bonds formed at the interfaces of NiO nanoparticles and graphene sheets. The NO2 molecules capture electrons from the surface of NiO nanoparticles when the sensor is exposed to NO2. More and more electrons are transferred from graphene to NiO by Ni–O–C bonds because of

• the lower Fermi level of NiO, increasing the sensitivity and response rate of the NiO–graphene sensor. However, the sensitivity of the NiO–graphene sensor was not as good as that of the pure NiO sensor at low concentrations of NO2 (0.25–1 ppm). In order to enhance the sensitivity of this sensor, the

Influence of the thickness of an antiferromagnetic IrMn layer on the static and dynamic magnetization of weakly coupled CoFeB/IrMn/CoFeB trilayers

• Deepika Jhajhria,
• Dinesh K. Pandya and
• Sujeet Chaudhary

Beilstein J. Nanotechnol. 2018, 9, 2198–2208, doi:10.3762/bjnano.9.206

• . There are theoretical studies that suggest the possibility of manipulating the AF moment by spin transfer torque [12][13][14]. Only recently, FM/AF (NiO, IrMn)/heavy metal heterostructures have been extensively studied to demonstrate the efficient spin current transfer across the AF layer mediated by AF

• transport through metallic IrMn layers of up to 3 nm of thickness via AF spin excitations has also been previously reported in Pt/IrMn/YIG heterostructures using spin-torque FMR [17]. Also, a highly efficient spin current transfer from Y3Fe5O12 (YIG) into NiO and subsequent spin propagation in NiO with spin