High-detectivity perovskite-based photodetector using a Zr-doped TiOx cathode interlayer

We investigated the incorporation of Zr into TiO_x cathode interlayers used as hole-blocking layers in an organometallic halide perovskite-based photodetector. The device configuration is ITO/PEDOT:PSS/CH₃NH₃PbI_xCl_3−x/PC₆₀BM/Zr–TiO_x/Al. The use of Zr–TiO_x in the perovskite photodetector reduces the leakage current and improves carrier extraction. The performance of the perovskite photodetector was confirmed by analyzing the current–voltage characteristics, impedance behaviors, and dynamic characteristics. The device with a Zr–TiO_x layer has a high specific detectivity of 1.37 × 10¹³ Jones and a bandwidth of 2.1 MHz at a relatively low reverse bias and light intensity. Therefore, it can be effectively applied to devices such as image and optical sensors.

The use of Zr–TiO_x in the perovskite photodetector reduces the leakage current and improves carrier extraction.     

Correction: Transition metal oxides as a cathode for indispensable Na-ion batteries

Correction for ‘Transition metal oxides as a cathode for indispensable Na-ion batteries’ by Archana Kanwade et al., RSC Adv., 2022, 12, 23284–23310, https://doi.org/10.1039/d2ra03601k.

The authors regret that the author list was shown incorrectly in the original article. The correct author list is as shown below:Sheetal Gupta†^a, Archana Kanwade†^a, Akash Kankane^a, Manish Kumar Tiwari^a, Abhishek Srivastava^a, Jena Akash Kumar Satrughna^b, Subhash Chand Yadav^a and Parasharam M. Shirage*^{a a}Department of Metallurgy Engineering and Materials Science, Indian Institute of Technology, Indore 453552, India, E-mail: pmshirage@iiti.ac.in, paras.shirage@gmail.com ^bDepartment of Physics, Indian Institute of Technology, Indore 453552, India† Equal contributions.Additionally, the authors regret that the photos of Ms Archana Kanwade and Ms Sheetal Gupta are incorrectly displayed. The correct photos are shown below:(1) The photo of Ms Sheetal Gupta is as follows:(2) The photo of Ms Archana Kanwade is as follows:The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

A sustainable approach to cathode delamination using a green solvent

Designing an environment-friendly delamination process for an end-of-life (EoL) composite cathode is a crucial step in direct cathode recycling. In this study, the green solvent dimethyl isosorbide (DMI) is explored to extract cathode active materials (AMs) from the Al current collector via dissolving the polyvinylidene fluoride (PVDF) binder. Mechanistic insight suggests that binder removal from the Al substrate proceeds via reducing polymer interchain interaction through DMI penetrating into the PVDF crystalline region. Polymer–solvent interaction may increase via establishing hydrogen bond between PVDF and DMI, which facilitates binder removal. Analytical characterizations including ¹H NMR, FTIR, XRD and SEM-EDS reveal that the molecular, micro, and crystal structures of the recovered cathode AMs, PVDF and Al foil are preserved. This finding is expected to provide a replacement for the toxic organic solvent N-methylpyrrolidone (NMP) and offers an effective, ecofriendly, and sustainable direct cathode recycling approach for spent Li-ion batteries.

A green solvent-based methodology was developed for delaminating cathode active materials from aluminium current collectors in end-of-life Li-ion batteries.     

Correction: Removal of fluoride ions using a polypyrrole magnetic nanocomposite influenced by a rotating magnetic field

Correction for ‘Removal of fluoride ions using a polypyrrole magnetic nanocomposite influenced by a rotating magnetic field’ by Uyiosa Osagie Aigbe et al., RSC Adv., 2020, 10, 595–609.

The authors regret that

Surface double coating of a LiNiaCobAl1−a−bO2 (a > 0.85) cathode with TiOx and Li2CO3 to apply a water-based hybrid polymer binder to Li-ion batteries

Recently a water-based polymer binder has been getting much attention because it simplifies the production process of lithium ion batteries (LIBs) and reduce their cost. The surface of LiNi_aCo_bAl_1−a−bO₂ (a > 0.85, NCA) cathode with a high voltage and high capacity was coated doubly with water-insoluble titanium oxide (TiO_x) and Li₂CO₃ layers to protect the NCA surface from the damage caused by contacting with water during its production process. The TiO_x layer was at first coated on the NCA particle surface with a tumbling fluidized-bed granulating/coating machine for producing TiO_x-coated NCA. However, the TiO_x layer could not coat the NCA surface completely. In the next place, the coating of the TiO_x-uncoated NCA surface with Li₂CO₃ layer was conducted by bubbling CO₂ gas in the TiO_x-coated NCA aqueous slurry on the grounds that Li₂CO₃ is formed through the reaction between CO₃²⁻ ions and residual LiOH on the TiO_x-uncoated NCA surface, resulting in the doubly coated NCA particles (TiO_x/Li₂CO₃-coated NCA particles). The Li₂CO₃ coating is considered to take place on the TiO_x layer as well as the TiO_x-uncoated NCA surface. The results demonstrate that the double coating of the NCA surface with TiO_x and Li₂CO₃ allows for a high water-resistance of the NCA surface and consequently the TiO_x/Li₂CO₃-coated NCA particle cathode prepared with a water-based binder possesses the same charge/discharge performance as that obtained with a “water-uncontacted” NCA particle cathode prepared using the conventional organic solvent-based polyvinylidene difluoride binder.

Recently a water-based polymer binder has been getting much attention because it simplifies the production process of lithium ion batteries (LIBs) and reduce their cost.     

Correction: Handling and managing bleeding wounds using tissue adhesive hydrogel: a comparative assessment on two different hydrogels

Correction for ‘Handling and managing bleeding wounds using tissue adhesive hydrogel: a comparative assessment on two different hydrogels’ by Thiruselvi T et al., RSC Adv., 2016, 6, 19973–19981.

The authors regret that Fig. 3(a) in the original article included an incorrect image. The top right image (48 hours control) was duplicated as the middle right image (48 hours PEG-gel) in error. The correct version of Fig. 3 is presented here.Open in a separate windowFig. 3(a) Cytocompatibility assessments of the samples (PEG-gel and GEG-gel) through live cell tracker assay using calcein as a fluorescent probe demonstrates the cell adherence and proliferation observed at different time intervals in comparison with control (uncoated wells). The scale bar measures 10 μm. (b) Cytotoxicity assessment of the samples (PEG-gel and GEG-gel) using MTT assay by measuring the absorbance at 570 nm in comparison with control.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Correction: Shedding light on the structural properties of lipid bilayers using molecular dynamics simulation: a review study

Correction for ‘Shedding light on the structural properties of lipid bilayers using molecular dynamics simulation: a review study’ by Sajad Moradi et al., RSC Adv., 2019, 9, 4644–4658.

The authors regret that incorrect details were given for ref. 22, 26 and 81 in the original article. The correct versions of ref. 22, 26 and 81 are given below.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Correction: Efficient biomass saccharification using a novel cellobiohydrolase from Clostridium clariflavum for utilization in biofuel industry

Correction for ‘Efficient biomass saccharification using a novel cellobiohydrolase from Clostridium clariflavum for utilization in biofuel industry’ by Asma Zafar et al., RSC Adv., 2021, 11, 9246–9261, DOI: 10.1039/D1RA00545F.

The authors regret that in the original article, the name and affiliation for one of the co-authors (Hasan Ufak Celebioglu) were incorrectly given. The correct name and affiliation are shown here.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Crystal alignment of a LiFePO4 cathode material for lithium ion batteries using its magnetic properties

We suggest a way to control the crystal orientation of LiFePO₄ using a magnetic field to obtain an advantageous structure for lithium ion conduction. We examined the magnetic properties of LiFePO₄ such as magnetism and magnetic susceptibility, which are closely related to the crystal rotation in an external magnetic field, and considered how to use these properties for desired crystal orientation; thus, we successfully fabricated the crystal-aligned LiFePO₄, in which the b-axis was highly aligned perpendicular to the surface of a current collector. Considering the low lithium ion conductivity of LiFePO₄ inherently originated from its one-dimensional path for lithium ion diffusion, the crystal-aligned LiFePO₄ potentially facilitates favorable transport kinetics for lithium ions during the charge/discharge process in lithium ion batteries. The crystal-aligned LiFePO₄ should afford lower electrode polarization than pristine LiFePO₄, and thus the former consistently exhibited higher reversible capacity than the latter.

The crystal orientation of LiFePO₄ was controlled by using a magnetic field to facilitate favorable transport kinetics for lithium ions.     

Correction: Multidimensional assembly using layer-by-layer deposition for synchronized cardiac macro tissues

Correction for ‘Multidimensional assembly using layer-by-layer deposition for synchronized cardiac macro tissues’ by Yongjun Jang et al., RSC Adv., 2020, 10, 18806–18815, DOI: 10.1039/D0RA01577F.

The authors regret that the name of one of the authors (Gi Seok Jeong) was shown incorrectly in the original article. The corrected author list is as shown above.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Correction of a genetic defect in multipotent germline stem cells using a human artificial chromosome

Human artificial chromosomes (HACs) have several advantages as gene therapy vectors, including stable episomal maintenance that avoids insertional mutations and the ability to carry large gene inserts including regulatory elements. Multipotent germline stem (mGS) cells have a great potential for gene therapy because they can be generated from an individual's testes, and when reintroduced can contribute to the specialized function of any tissue. As a proof of concept, we herein report the functional restoration of a genetic deficiency in mouse p53-/- mGS cells, using a HAC with a genomic human p53 gene introduced via microcell-mediated chromosome transfer. The p53 phenotypes of gene regulation and radiation sensitivity were complemented by introducing the p53-HAC and the cells differentiated into several different tissue types in vivo and in vitro. Therefore, the combination of using mGS cells with HACs provides a new tool for gene and cell therapies. The next step is to demonstrate functional restoration using animal models for future gene therapy.     

Correction: Single nucleotide detection using bilayer MoS2 nanopores with high efficiency

Correction for ‘Single nucleotide detection using bilayer MoS₂ nanopores with high efficiency’ by Payel Sen et al., RSC Adv., 2021, 11, 6114–6123, DOI: 10.1039/D0RA10222A.

The authors would like to include additional sentences in their RSC Advances article to reference the updated ESI. The paragraph beginning on line four in the right hand column on page 6118 should read as follows:Fig. 3a–h presents truncated single nucleotide peaks obtained for ML and BL MoS₂ nanopores for a direct comparison of dwell times. The raw, 100-fold upscaled and the data filtered at 20 kHz for all the different nucleotide translocations for ML and BL MoS₂ nanopores are shown in Fig. S12. The protocol used for the analysis is also described in the ESI†. It is observed that the dwell times are higher for BL as compared to those of the ML MoS₂ nanopores for all the different nucleotides. Blockade current is plotted as a function of dwell time for 3000 single nucleotide transport events in Fig. 3i. We observe four distinct blockade current regions for the different nucleotides. Thus, we can conclude that both ML and BL MoS₂ nanopores are capable of detecting single nucleotides. The blockade current for the nucleotide translocation is plotted as histograms to observe their distribution (ESI Fig. S4†). We observe normal distribution for all the nucleotides for both ML and BL nanopores. Thus, the mean blockade current values along with their standard deviations can be obtained.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Correction: Hydrogen production by electrochemical reaction using ethylene glycol with terephthalic acid

Correction for ‘Hydrogen production by electrochemical reaction using ethylene glycol with terephthalic acid’ by Se-Hyun Kim et al., RSC Adv., 2021, 11, 2088–2095, DOI: 10.1039/D0RA10187G.

The authors regret the omission of a funding acknowledgement in the original article. This acknowledgement is given below.This work was supported by a National Research Foundation of Korea (NRF) grant, funded by the Korean Government (NRF2016R1D1A1A09918845).The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

High performance of CH3NH3PbCl3 perovskite single crystal photodetector with a large active area using asymmetrical Schottky interdigital contacts

Due to the limited electrode structure types of current CH₃NH₃PbCl₃ perovskite single crystal photodetectors, these devices either have good performance but small active area or have large active area but poor performance, which greatly limits their applications. To realize a high performance of a CH₃NH₃PbCl₃ perovskite single crystal photodetector with a large active area, a CH₃NH₃PbCl₃ single crystal photodetector with asymmetrical Schottky interdigital contacts originating from planar interdigital Au–Ag electrodes was fabricated in this work. The device not only had a large active area (around 8 mm²) but also showed excellent photoelectric performance due to its built-in electric field. The responsivity of the device can reach 5.8 mA W⁻¹ at 0 V and 0.24 A W⁻¹ at 30 V reverse voltage. The response time of the device can reach 317 μs (rise)/6.82 ms (decay) at 0 V and 100 μs (rise)/2 ms (decay) at 30 V reverse voltage. The above results demonstrate that this study will provide an effective method for realizing high performance of a CH₃NH₃PbCl₃ perovskite single crystal photodetector with a large active area.

The high performance of a Au/CH₃NH₃PbCl₃ single crystal/Ag structured photodetector with a large active area.     

Correction: A high energy density asymmetric supercapacitor utilizing a nickel phosphate/graphene foam composite as the cathode and carbonized iron cations adsorbed onto polyaniline as the anode

Correction for ‘A high energy density asymmetric supercapacitor utilizing a nickel phosphate/graphene foam composite as the cathode and carbonized iron cations adsorbed onto polyaniline as the anode’ by A. A. Mirghni et al., RSC Adv., 2018, 8, 11608–11621.

Sekhar C. Ray was incorrectly spelled in the published article; the corrected version is shown above.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Correction: Silica cubosomes templated by a star polymer

Correction for ‘Silica cubosomes templated by a star polymer’ by Congcong Cui et al., RSC Adv., 2019, 9, 6118–6124.

The authors wish to report extra characterisation data to provide further evidence for the synthesis of the AB₂ star polymer reported in the original article.The authors have added additional ¹H NMR (Fig. S8) and MALDI-TOF MS (Fig. S9) spectra for all synthesis steps of the reaction to support the polymer synthesis. The ¹H NMR spectra show the appearance and disappearance of two of the characteristic peaks for 4-methylphenyl in the reactions to synthesise PEG–N–OH₂ (marked in the green box, Fig. S8). Subsequently, the characteristic methyl peak of the macroinitiator (PEG–N–Br₂) is also observed (marked in the blue box, Fig. S8). The MALDI-TOF MS spectrum of the product of each reaction shows a set of peaks with a spacing of 44 m/z (corresponding to the PEG repeating unit, –CH₂–CH₂–O–). The main peak position changes as the terminal group changes. The absolute molecular weight of each product obtained through MALDI-TOF MS matches well with the calculated molecular weight.The electronic supplementary information (ESI) of the original article has been updated to reflect these changes.In addition, the authors regret that the signal for the CH–Br group in the ¹H NMR spectrum, shown in Fig. 1 of the original article, was incorrectly assigned. The signal should have been assigned to the broad peak at around 4.5 ppm. Due to the small number of end groups compared to the polymer chain, the signals of the end groups are very weak and difficult to identify. The correct version of Fig. 1 is shown below.Open in a separate windowFig. 1 ¹H NMR spectrum of the polymer.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Correction: Mild deprotection of the N-tert-butyloxycarbonyl (N-Boc) group using oxalyl chloride

Correction for ‘Mild deprotection of the N-tert-butyloxycarbonyl (N-Boc) group using oxalyl chloride’ by Nathaniel George et al., RSC Adv., 2020, 10, 24017–24026, DOI: 10.1039/D0RA04110F.

The authors regret the omission of a funding acknowledgement in the original article. This acknowledgement is given below.The authors acknowledge support of the Center for Pharmaceutical Research and Innovation (NIH P20 GM130456).The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.     

Correction: Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids

Correction for ‘Ultrasound-assisted leaching of vanadium from fly ash using lemon juice organic acids’ by G. Rahimi et al., RSC Adv., 2020, 10, 1685–1696, DOI: 10.1039/C9RA09352G.

The authors regret that the name of one of the authors (Farhad Rahmani) was shown incorrectly in the original article. The corrected author list is as shown above.The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.