Author
H. Juárez Santiesteban
Bio: H. Juárez Santiesteban is an academic researcher from Benemérita Universidad Autónoma de Puebla. The author has contributed to research in topics: Chemical bath deposition & Band gap. The author has an hindex of 6, co-authored 10 publications receiving 107 citations.
Papers
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TL;DR: In this article, a porous silicon (PS) layer was investigated as a sensing material to detect organic vapors, which was obtained by electrochemical anodization of p-type crystalline silicon (c-Si) in an ethanoic HF solution in order to produce a mesoporous material.
50 citations
TL;DR: The structural, electrical and opto-electronic properties of PbS thin films doped with Li+ ion were investigated in this paper, which showed that the crystallite size showed a strong dependence on Li doping, the crystal size changed from 36-nm to 12-nm due to Li incorporation.
27 citations
TL;DR: In this paper, preliminary results in the synthesis of copper sulfide (CuS) nanocrystals, applying the Chemical Bath Deposit technique and subsequent thermal treatment at 1000 °C in air atmosphere, were presented.
12 citations
TL;DR: In this paper, the effect of reaction temperature (∼20 °C and ∼90 °C samples) on the morphological, structural and some optical properties of Holmium oxide (Ho2O3) nanocrystals were investigated.
12 citations
TL;DR: In this article, the synthesis of Pd mixed with PdO nanoparticles, grown by chemical bath deposition at ~80°C, was investigated using the scanning electron microscopy (SEM), Fourier transform infrared (FTIR), X-ray diffraction (XRD), optical absorption and photoluminescence (PL) techniques.
12 citations
Cited by
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TL;DR: In this article, a paper-based polydiacetylene (PDA) colorimetric sensor array is prepared from eight diacetylene monomers, six of which are amphiphilic and the other two are bolaamphiphilic.
Abstract: Detection and identification of VOCs in their vapor phase is essential for safety and quality assessment. In this work, a novel platform of a paper-based polydiacetylene (PDA) colorimetric sensor array is prepared from eight diacetylene monomers, six of which are amphiphilic and the other two are bolaamphiphilic. To fabricate the sensors, monomers are coated onto a filter paper surface using the drop-casting technique and converted to PDAs by UV irradiation. The PDA sensors show solvent induced irreversible color transition upon exposure to VOC vapors. When combined into a sensing array, the color change pattern as measured by RGB values and statistically analyzed by principal component analysis (PCA) is capable of distinguishing 18 distinct VOCs in the vapor phase. The PCA score and loading plots also allow the reduction of the sensing elements in the array from eight to three PDAs that are capable of classifying 18 VOCs. Utilizing an array containing only two PDAs, various types of automotive fuels including gasoline, gasohol and diesel are successfully classified.
155 citations
TL;DR: Porous silicon surface modification methods have been employed for detecting different gas molecules; H2O, ethanol, methanol, isopropanol, COx, NOx, NH3, O2, H2Cl, SO2, HO2 and PH3 as discussed by the authors.
Abstract: Recent developments in porous silicon gas sensors have been reviewed. Monitored species detection levels, and the mechanisms of sensing for different sensor designs are also discussed. Porous silicon surface modification methods have been employed for detecting different gas molecules; H2O, ethanol, methanol, isopropanol, COx, NOx, NH3, O2, H2, HCl, SO2, H2S and PH3.
148 citations
Book•
07 Nov 2013
TL;DR: The Handbook of Gas Sensor Materials : Properties, Advantages and Shortcomings for Applications Volume 2: New Trends and Technologies as mentioned in this paper is available on our book collections and it comes PDF and EPUB document format.
Abstract: Do you need the book of Handbook of Gas Sensor Materials : Properties, Advantages and Shortcomings for Applications Volume 2: New Trends and Technologies pdf with ISBN of 9781461473879? You will be glad to know that right now Handbook of Gas Sensor Materials : Properties, Advantages and Shortcomings for Applications Volume 2: New Trends and Technologies pdf is available on our book collections. This Handbook of Gas Sensor Materials : Properties, Advantages and Shortcomings for Applications Volume 2: New Trends and Technologies comes PDF and EPUB document format. If you want to get Handbook of Gas Sensor Materials : Properties, Advantages and Shortcomings for Applications Volume 2: New Trends and Technologies pdf eBook copy, you can download the book copy here. The Handbook of Gas Sensor Materials : Properties, Advantages and Shortcomings for Applications Volume 2: New Trends and Technologies we think have quite excellent writing style that make it easy to comprehend.
137 citations
TL;DR: In this article, a review article is devoted to the analysis of the problems related to the design of gas sensors based on porous semiconductors (PS), and the peculiarities of the semiconductor porosification by anodic etching and the principles of gas sensor design, including gas sensor construction and main operating characteristics, are considered.
Abstract: The present review article is devoted to the analysis of the problems related to the design of gas sensors based on porous semiconductors (PS). The peculiarities of the semiconductor porosification by anodic etching and the principles of gas sensor design based on porous semiconductors, including gas sensor construction and main operating characteristics, are considered in the article. It is shown that the influence of the surrounding atmosphere on such parameters of porous semiconductors as refractive index, the intensity of photoluminescence, electroconductivity, dielectric constant, and surface potential might be used for gas sensor design. Based on the conducted analysis it is concluded that porous semiconductors have a great potential for the above-mentioned applications. However, the realization of those opportunities is restrained by such factors as bad reproducibility, increased temporal drift of characteristics, low selectivity, and an unsatisfactory level of understanding of the operating mechan...
91 citations
TL;DR: In this paper, a chemical pathway is proposed to functionalize and stabilize porous silicon structures that are primordial for further effective molecular confinement, which avoids the preliminary thermal oxidation of the PSi surface and consists of a direct surface oxidation during the silanization process, an amino activation by a linker, and the binding of the GOX enzyme.
Abstract: Stable porous silicon microcavities (PSiMcs) are designed in order to detect the confined glucose oxidase (GOX) at low concentration. A chemical pathway is proposed to functionalize and stabilize porous silicon structures that are primordial for further effective molecular confinement. The procedure avoids the preliminary thermal oxidation of the PSi surface and consists of a direct surface oxidation during the silanization process, an amino activation by a linker that also prevents further oxidation, and the binding of the GOX enzyme. Functionalization and protein confinement are monitored by the narrow resonance peaks in the near-infrared region (700–1000 nm) of the engineered meso- and macroporous microcavities. Protein penetration along the entire, large pore sized structure is demonstrated. The protein retains its native form within the properly functionalized PSi structures, which are ideal for molecular sensing also due to their high quality factor. A detection resolution of 25 nM GOX has been determined, thus demonstrating the high quality sensing of our functionalized porous silicon microcavity structures.
63 citations