Electrochemically Active Thin Carbon Films with Enhanced Adhesion to Silicon Substrates

Niu, Pengfei; Asturias-Arribas, Laura; Gich, Martí; Fernández‐Sánchez, César; Roig, Anna

doi:10.1021/acsami.6b07347

Cited by 7 publications

(10 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Details about the deposition of RF/SiO 2 films and the pyrolysis process to generate the corresponding C/SiO 2 films on Si substrates of different dimensions (from 2 × 2 cm 2 to 4 in. wafers) through spin‐coating RF/APTES sol solutions, can be found elsewhere . The key point of the process was the incorporation of APTES to RF sols that greatly enhanced the interfacial adhesion of the resulting sol–gel films to Si substrates containing a thermally grown SiO 2 surface layer, without significantly affecting the electrical properties of the resulting carbon thin‐films.…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, lithographic processes, including conventional photolithography and soft lithography, have been used to directly pattern sol–gel materials in the fabrication of lab‐on‐a‐chip devices. Recently, we have developed a one‐pot sol–gel approach for preparing carbon/silica (C/SiO 2 ) thin films that addresses the limitation of poor adhesion to silicon wafers . These C/SiO 2 films show a remarkably strong interfacial adhesion to Si/SiO 2 substrates thanks to the formation of siloxane chemical bonds (SiOSi) between the silanol groups on both the substrate and the material.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Carbon–Silica Composites to Produce Highly Robust Thin‐Film Electrochemical Microdevices

Niu

Asturias-Arribas

Jordà

et al. 2017

Adv Materials Technologies

Self Cite

View full text Add to dashboard Cite

increased speed of analysis, reduced sample consumption, and waste production, portability, disposability as well as the potential for on-site use. [1] In the context of electrochemical devices, the integration of versatile conductive materials on chip is required for implementing electroanalytical platforms in different scenarios including (bio)chemical sensing or energy and electrocatalytic applications. Among them, carbon materials, in a variety of forms from graphite to amorphous carbon as well as carbon nanotubes or graphene, [2][3][4] have been combined with various fabrication approaches based on thick film (screen-printing) [5] or thinfilm (lithographic) [6] technologies for producing reproducible and inexpensive on-chip electrochemical devices. Thick carbon films are commonly prepared by printing commercial carbon ink formulations containing different binding polymers and adhesion promoters that depend on the manufacturer and that often make the electrochemical performance of the resulting devices to differ significantly. [7] By contrast, thin carbon films are produced with nearly pure carbon materials making the electrochemical performance of the device to be more steadfast.So far, a variety of procedures have been described to develop thin carbon films on technologically relevant substrates, which mostly fall into two main categories, namely, gas phase deposition and liquid phase deposition, followed by carbonization. Gas phase deposition techniques, including physical [8,9] and chemical vapor [10][11][12][13] deposition, produce thin carbon films of superior quality displaying a wide range of structures and properties between those of graphite [9] and diamond [12] or carbon nanomaterials such as nanotubes [11] or graphene. [13] On-chip platforms including highly sensitive electrochemical sensors [14] or supercapacitors [15] are achieved by patterning these thin carbon films via microfabrication techniques such as lithography. Nevertheless, these film deposition methods require sophisticated equipment as well as stringent deposition conditions, such as vacuum or an inert atmosphere, gas flow adjustments, and relatively high carbonization temperatures, which are demanding and costly. Liquid-phase deposition techniques mainly comprise coating a substrate with a polymer precursor followed by carbonization. [16,17] This approach benefits from Carbonaceous materials are extensively applied to the development of electrochemical devices for electroanalysis, energy conversion, and storage or electrocatalysis because of their rather unique features that include high chemical stability, low cost, and wide potential window. Furthermore, they are processed into thick or thin-film structures onto different substrates for producing electrode devices whose widespread use, however, is hampered by the film composition and the poor mechanical stability. Here the application of carbon/ silica composites is shown to produce miniaturized thin-film electrodes, which stand out for their robustness and can thus be used re...

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon–Silica Composites to Produce Highly Robust Thin‐Film Electrochemical Microdevices

Niu

Asturias-Arribas

Jordà

et al. 2017

Adv Materials Technologies

Self Cite

View full text Add to dashboard Cite

show abstract

“…These films are based on the simultaneous gelation of the 3‐aminopropyltriethoxysilane (APTES) silica precursor and resorcinol/ formaldehyde carbon precursors, in a one‐pot synthesis process. We have also demonstrated that these films exhibit good homogeneity and excellent electrochemical performance . Moreover, different lithographic‐based microfabrication approaches were tested to pattern these films and thus produce carbon based thin film electrochemical sensors (Figure , route B) .…”

Section: Electroanalytical Devices Made With Resorcinol‐formaldehyde mentioning

confidence: 91%

Metal Nanoparticle Carbon Gel Composites in Environmental Water Sensing Applications

Niu

Gich

Roig

et al. 2018

The Chemical Record

Self Cite

View full text Add to dashboard Cite

The synthesis of organic-inorganic nanocomposites that can interact with different environmental pollutants and can be mass-produced are very promising materials for the fabrication of chemical sensor devices. Among them, metal (or metal oxide) nanoparticles doped conductive porous carbon composites can be readily applied to the production of electrochemical sensors and show enhanced sensitivity for the measurement of water pollutants, thanks to the abundant accessible and functional sites provided by the interconnected porosity and the metallic nanoparticles, respectively. In this personal account, an overview of several synthesis routes of porous carbon composites containing metallic nanoparticles is given, paying special attention to those based on sol-gel techniques. These are very powerful to synthesize hybrid porous materials that can be easily processed into powders and thin films, so that they can be implemented in electrode fabrication processes based on screen-printing and lithography techniques, respectively. We emphasize the sol-gel routes developed in our group for the synthesis of bismuth or gold nanoparticle doped porous carbon composites applied to fabricate electrochemical sensors that can be scaled down to produce miniaturized on-chip sensing devices for the sensitive detection of heavy metal pollutants in water. The trend towards the miniaturization of electrochemical sensors to be readily employed as analytical tools in environmental monitoring follow the market requirements of rapid and accurate on-site analysis, small sample consumption and waste production, as well as potential for continuous or semi-continuous in-situ determination of a wide variety of target analytes.

show abstract

“…Initially, carbon/silica (C/SiO 2 ) films were produced in order to study the film's electrical and mechanical properties. The preparation of these films has been previously reported by our group [22], and applied in this work with some variations. Details about the reagents and materials used in this synthesis can be found in the SI.…”

Section: Preparation Of C/sio 2 Filmsmentioning

confidence: 99%

Compact fluidic electrochemical sensor platform for on-line monitoring of chemical oxygen demand in urban wastewater

Duan

Gunes

Baldi

et al. 2022

Chemical Engineering Journal

Self Cite

View full text Add to dashboard Cite

Electrochemically Active Thin Carbon Films with Enhanced Adhesion to Silicon Substrates

Cited by 7 publications

References 30 publications

Carbon–Silica Composites to Produce Highly Robust Thin‐Film Electrochemical Microdevices

Carbon–Silica Composites to Produce Highly Robust Thin‐Film Electrochemical Microdevices

Metal Nanoparticle Carbon Gel Composites in Environmental Water Sensing Applications

Compact fluidic electrochemical sensor platform for on-line monitoring of chemical oxygen demand in urban wastewater

Contact Info

Product

Resources

About