Infrared study of the oxidation of porous silicon: evidence of surface modes

Acquaroli, Leandro N.; Brondino, Agustín; Schmidt, Javier Alejandro; Arce, R.; Koropecki, R. R.

doi:10.1002/pssc.200881001

Cited by 7 publications

(10 citation statements)

References 14 publications

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“…The median particle diameter of SiMPs changed from 5.63 to 2.34 μm after ball milling, and the size of all particles decreased significantly (Figure S1a–c). And in Figure S1d, the peaks in FTIR spectra of the samples before and after ball milling are basically the same, and only the peaks at 3446 cm –1 ascribed from the stretching modes of Si–OH and 1101 cm –1 of the Si–O–Si bonds move toward lower wavenumbers and widen after ball milling, indicating the increase of −OH on the SiMP surface and the enhancement of hydrogen bonding, which will facilitate the interaction between silicon particles and the binder. , …”

Section: Resultsmentioning

confidence: 85%

“…And in Figure S1d, the peaks in FTIR spectra of the samples before and after ball milling are basically the same, and only the peaks at 3446 cm −1 ascribed from the stretching modes of Si− OH and 1101 cm − increase of −OH on the SiMP surface and the enhancement of hydrogen bonding, which will facilitate the interaction between silicon particles and the binder. 33,34 3.2. Preparation and Characterization of the Binder.…”

Section: Pretreatment and Characterization Of The Simentioning

confidence: 99%

“…The median particle diameter of SiMPs changed from 5.63 to 2.34 μm after ball milling, and the size of all particles decreased significantly (Figure S1a increase of −OH on the SiMP surface and the enhancement of hydrogen bonding, which will facilitate the interaction between silicon particles and the binder. 33,34 3.2. Preparation and Characterization of the Binder.…”

Section: Pretreatment and Characterization Of The Simentioning

confidence: 99%

See 2 more Smart Citations

High-Performance Carboxymethyl Cellulose Integrating Polydopamine Binder for Silicon Microparticle Anodes in Lithium-Ion Batteries

Fu²,

Zhao

et al. 2023

ACS Appl. Energy Mater.

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Silicon microparticles (SiMPs) have been gradually explored as the anode materials for lithium-ion batteries (LIBs) because they have higher tap density and lower cost than nanostructured Si and thus are more suitable for commercial high-energy battery applications. Developing a binder to alleviate the volume effect of SiMPs and ensure electrode stability during cycling is an effective method. Here, we propose a water-soluble binder by integrating carboxymethyl cellulose (CMC) with polydopamine (PDA) prepared from an alkaline aqueous solution, and the conventional buffer tris, an organic substance, is discarded to avoid problems during electrode preparation. The obtained binder CMC-10% PDA exhibits higher viscosity and better mechanical properties than CMC due to the strong interaction between CMC and PDA through hydrogen bonds and some covalent bonds. The SiMP anodes with the binder (the Si@ CMC-10% PDA electrodes) demonstrate excellent cycling stability (above 1700 mAh g −1 at 0.2 C after 1000 cycles) and rate performance (1269 mAh g −1 at 4 C) and can deliver a high area capacity above 3 mAh cm −2 at a Si load of 1.36 mg cm −2 . The full cells composed of the Si@CMC-10% PDA anodes and lithium iron phosphate (LFP) cathodes can maintain an 80% capacity retention after 50 cycles, demonstrating practical application potential.

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Section: Resultsmentioning

confidence: 85%

Section: Pretreatment and Characterization Of The Simentioning

confidence: 99%

Section: Pretreatment and Characterization Of The Simentioning

confidence: 99%

See 1 more Smart Citation

High-Performance Carboxymethyl Cellulose Integrating Polydopamine Binder for Silicon Microparticle Anodes in Lithium-Ion Batteries

Fu²,

Zhao

et al. 2023

ACS Appl. Energy Mater.

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“…Los procesos de funcionalización del SMP producen terminaciones de Si-(OH) x y Si-O que favorecen la inserción de moléculas polares al interior del SMP [29,30]. Para confirmar este hecho, obtuvimos espectros de absorbancia de las muestras.…”

Section: Silicio Macroporosounclassified

Nanocomposites Based on Ordered Porous Membranes to Study Lipid Bilayers Phase Transition

Forzani

Garcés

Arce

et al. 2014

AnAFA

Self Cite

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R ecib ido: 10/11/2013; a cep t a do: 11/06/2014En este trabajo desarrollamos metodologías basadas en propiedades fotónicas del silicio poroso y de la alúmina porosa, para el estudio de transformaciones de fase de membranas lipídicas confinadas en diferentes entornos. Se presentan aquí resultados preliminares de las etapas de preparación y optimización de membranas de alúmina anódica porosa nanoestructurada y películas de silicio macroporoso (SMP) con diferentes grados de orden. Se estudió mediante microscopía AFM y técnicas de optofluídica el efecto de impurezas en el grado de ordenamiento de los poros de la alúmina porosa. Por espectroscopía infrarroja de transformada de Fourier se verificó la funcionalización de la superficie e introducción de lípidos en la estructura porosa y por medio de espectroscopia de resonancia paramagnética electrónica se evidenció la formación de bicapas lipídicas al interior del SMP. Por otro lado se está optimizando la preparación de SMP con distribución ordenada de poros para la preparación de cristales fotónicos bidimensionales. Se espera que el cambio en la respuesta espectral de estos dispositivos, al formarse las bicapas lipídicas en la superficie de los poros, permita caracterizar las transiciones de fase de los lípidos en un entorno confinado. Palabras clave: Alúmina Porosa, Silicio Macroporoso, Lípidos, Bicapas LipídicasIn this work we developed methodologies based on photonic properties of porous silicon and porous alúmina, for the study of phase transformations in lipid membranes confined in different environments. We show some preliminary results about the preparation and optimization stages of porous anodic alumina membranes and macroporous silicon films (SMP) with different degrees of order. The effect of impurities on the order degree of porous alumina was studied by AFM microscopy and optofluidic techniques. Using Fourier Transform Infrared Spectroscopy the lipid introduction into the porous structure was verified, and lipid bilayers formation into SMP was evidenced by electron paramagnetic resonance. On the other hand, we are optimizing the preparation of ordered SMP for the formation of two-dimensional photonic crystals. It is expected that the change in the spectral response of these devices upon formation of lipid bilayers on the pore surfaces will allow studying lipid phase transitions in a confined environment.

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“…1 Introduction Using silicon wafers p-Si as material base and electrochemical anodizing process permit to obtained commonly a nanostructure semiconductor material [1,2]. The material produced is known as porous silicon (PS) [3,4].…”

mentioning

confidence: 99%

Impedance spectra under forward and reverse bias conditions in gold/porous silicon/p‐Si structures

Fonthal

Chavarria

2010

Phys. Status Solidi C

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– The AC electrical characterization of Au/porous silicon/p‐Si structure is presented. The low porosity porous silicon layers were prepared by electrochemical etching in p‐type silicon 〈100〉 with two resistivities. The AC electrical measurements capacitance–conductance–frequency were performed from 5 Hz to 10 MHz, at room temperature in the DC range of ±2 V. We studied two structures; first a conductor type Au/PS/Au and second diode type Au/PS/p‐Si/Al. We found the relationship between the bias voltage in the PS/p‐Si heterostructures with the depletion region formation and the conduction mechanism presents in these structures. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Infrared study of the oxidation of porous silicon: evidence of surface modes

Cited by 7 publications

References 14 publications

High-Performance Carboxymethyl Cellulose Integrating Polydopamine Binder for Silicon Microparticle Anodes in Lithium-Ion Batteries

High-Performance Carboxymethyl Cellulose Integrating Polydopamine Binder for Silicon Microparticle Anodes in Lithium-Ion Batteries

Nanocomposites Based on Ordered Porous Membranes to Study Lipid Bilayers Phase Transition

Impedance spectra under forward and reverse bias conditions in gold/porous silicon/p‐Si structures

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