Spiral magnetic structure of Fe in Van der Waals gapped FeOCl and polyaniline-intercalated FeOCl

Hwang, S. R.; Li, W.-H.; Lee, K. C.; Lynn, J. W.; Wu, Chun‐Guey

doi:10.1103/physrevb.62.14157

Cited by 66 publications

(36 citation statements)

References 24 publications

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“…This is the expansion reported for PANIFeOCl in Ref. 12 and is in line with the reports for other intercalates. 7,9,20 In Fig.…”

Section: Interpretation Of the K Edge Lineshapesupporting

confidence: 81%

“…12 The composition of the Na-intercalated sample was estimated to be Na 0.27 FeOCl. The composition of the PANI-FeOCl sample used in this study was not measured, but is con-sidered to be very close to the composition of the sample prepared according to the same experimental procedure in Ref.…”

Section: Methodsmentioning

confidence: 99%

“…The spectrum simulated for FeOCl using the lattice parameters reported in Ref. 12, a=3.29921Å, b=3.77450Å, c=7.90852Å, is shown in Fig. 2.…”

Section: Interpretation Of the K Edge Lineshapementioning

confidence: 99%

“…The intercalation process has been commonly reported to cause a slight expansion of the lattice parameters a and b, while c is doubled and expanded. 7,9,12 The doubling of c is ascribed to a shift of (a/2,b/2) in the stacking of the bilayers, while the expansion, varying between 30 and 70 % depending on the studies, is that of the intercalation gap. Since the interlayer interactions are not included in our simulations, we used the same value of the c parameter for the spectrum of pristine and intercalated FeOCl.…”

Section: Interpretation Of the K Edge Lineshapementioning

confidence: 99%

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Charge transfer in FeOCl intercalation compounds and its pressure dependence: An x-ray spectroscopic study

et al. 2010

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We present a study of charge transfer in Na-intercalated FeOCl and polyaniline-intercalated FeOCl using high-resolution x-ray absorption spectroscopy and resonant x-ray emission spectroscopy at the Fe-K edge. By comparing the experimental data with ab-initio simulations, we are able to unambiguously distinguish the spectral changes which appear due to intercalation into those of electronic origin and those of structural origin. For both systems, we find that about 25% of the Fe sites are reduced to Fe 2+ via charge transfer between FeOCl and the intercalate. This is about twice as large as the Fe 2+ fraction reported in studies using Mössbauer spectroscopy. This discrepancy is ascribed to the fact that the charge transfer occurs on the same time scale as the Mössbauer effect itself. Our result suggests that every intercalated atom or molecule is involved in the chargetransfer process, thus making this process a prerequisite for intercalation. The Fe 2+ fraction is found to increase with pressure for polyaniline-FeOCl, hinting at an enhancement of the conductivity in the FeOCl intercalation compounds under pressure.

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“…This is the expansion reported for PANIFeOCl in Ref. 12 and is in line with the reports for other intercalates. 7,9,20 In Fig.…”

Section: Interpretation Of the K Edge Lineshapesupporting

confidence: 81%

Section: Methodsmentioning

confidence: 99%

“…The spectrum simulated for FeOCl using the lattice parameters reported in Ref. 12, a=3.29921Å, b=3.77450Å, c=7.90852Å, is shown in Fig. 2.…”

Section: Interpretation Of the K Edge Lineshapementioning

confidence: 99%

Section: Interpretation Of the K Edge Lineshapementioning

confidence: 99%

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Charge transfer in FeOCl intercalation compounds and its pressure dependence: An x-ray spectroscopic study

et al. 2010

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“…In any case, it is commonly accepted that the performances are closely related with morphology, structure, specific area, and chemical stability of FeOCl nanomaterials, which strongly depends on the preparation strategies and experimental conditions . For decades, however, almost all the reported FeOCl materials were obtained by one exclusive strategy, the chemical vapor transport (CVT), which utilizes FeCl 3 and Fe 2 O 3 mixed powders as precursor and requires a heating procedure at a temperature of 380 °C over days . The CVT strategy is extremely time consuming and as‐obtained FeOCl materials possess single morphology of nanoplate with micrometer dimensions.…”

Section: Introductionmentioning

confidence: 99%

Au‐NP‐Decorated Crystalline FeOCl Nanosheet: Facile Synthesis by Laser Ablation in Liquid and its Exclusive Gas Sensing Response to HCl at Room Temperature

Wang

Zhang

Zhu

et al. 2016

Adv Materials Inter

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reported as a new effi cient Fenton-like catalyst for yielding oxidative hydroxyl radicals (HO•) to degrade organic contaminants. [ 5 ] Other applications are rarely reported in the literature. In any case, it is commonly accepted that the performances are closely related with morphology, structure, specifi c area, and chemical stability of FeOCl nanomaterials, which strongly depends on the preparation strategies and experimental conditions. [ 6 ] For decades, however, almost all the reported FeOCl materials were obtained by one exclusive strategy, the chemical vapor transport (CVT), which utilizes FeCl 3 and Fe 2 O 3 mixed powders as precursor and requires a heating procedure at a temperature of 380 °C over days. [ 5,7 ] The CVT strategy is extremely time consuming and asobtained FeOCl materials possess single morphology of nanoplate with micrometer dimensions. Also, the fi nite experimental parameters make it diffi cult to effectively modulate the microstructure, morphology and composition, which limits its practical applications in fi elds of catalysis, energy storage, and conducting materials. Recently, we developed a new technique, laser ablation in liquid solution (LAL), to facilely synthesize the crystalline FeOCl nanosheets at ambient conditions. By laser ablating Au foil in surrounding FeCl 3 solutions for minutes, spherical Au nanoparticles (NPs) decorated FeOCl nanosheets could be synthesized in a one-pot procedure. Technical characterizations illustrate that the crystalline nanosheets possess (010) preferred orientations with microsized dimensions in the plane and tens of nanometers in thickness. The Au/FeOCl nanocomposites own good thermal stability and surface of which adsorbs abundant H 2 O molecularly and oxygen species chemically. The fabrication route is simple and much more effi cient compared to the traditional CVT method. Furthermore, the crystalline size and proportion of Au or FeOCl in the nanocomposites could be effectively modulated by simply changing FeCl 3 concentrations. We proposed that the localized liquid region, formed around the interface between LAL-induced plasma plume and surrounding liquid, provides the hydrolysis reaction platform for the formation of FeOCl nanosheets.

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Optimizing Single‐Walled‐Carbon‐Nanotube‐Based Saturable Absorbers for Ultrafast Lasers

Ferrari

Bini

Capsoni

et al. 2012

Adv Funct Materials

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The application of single-walled carbon nanotubes (SWCNTs) as saturable absorbers (SA) in a Nd:glass femtosecond laser is verifi ed as a promising alternative to traditional semiconductor saturable-absorber mirrors (SESAMs). The shortest laser pulses achieved with a SWCNT-SA fabricated by the slow-evaporation method are reported herein. Nearly Fourier-limited 288 fs pulses are obtained with negative-dispersion soliton mode-locking. The importance of the properties of the starting material, such as the degree of purity and the chirality, and the successive slow-evaporation deposition method is proven by using a multitechnique approach based on X-ray diffractometry, scanning electron microscopy, and μ -Raman spectroscopy. The high degree of nanotube alignment on the glass substrate and also the slight metallic character due to electron transfer between the glass matrix and the nanotubes themselves are identifi ed as the main features responsible for the good laser response.

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Spiral magnetic structure of Fe in Van der Waals gapped FeOCl and polyaniline-intercalated FeOCl

Cited by 66 publications

References 24 publications

Charge transfer in FeOCl intercalation compounds and its pressure dependence: An x-ray spectroscopic study

Charge transfer in FeOCl intercalation compounds and its pressure dependence: An x-ray spectroscopic study

Au‐NP‐Decorated Crystalline FeOCl Nanosheet: Facile Synthesis by Laser Ablation in Liquid and its Exclusive Gas Sensing Response to HCl at Room Temperature

Optimizing Single‐Walled‐Carbon‐Nanotube‐Based Saturable Absorbers for Ultrafast Lasers

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