A Mini Review: Recent Advances in Surface Modification of Porous Silicon

Lee, Seo Hyeon; Kang, Jae Seung; Kim, Dokyoung

doi:10.3390/ma11122557

Cited by 56 publications

(30 citation statements)

References 68 publications

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“…Porous silicon has been found useful in a broad range of industries [4]. Numerous methods for synthesizing such materials have been reported, and the review paper by Lee et al summarizes breakthroughs and recent trends [5]. Despite extensive work, there is still a great demand for further development of advanced surface modification methods for this material.…”

Section: This Special Issuementioning

confidence: 99%

Surface Modification to Improve Properties of Materials

Mozetič

2019

Materials

168

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Surface properties of modern materials are usually inadequate in terms of wettability, adhesion properties, biocompatibility etc., so they should be modified prior to application or any further processing such as coating with functional materials. Both the morphological properties and chemical structure/composition should be modified in order to obtain a desired surface finish. Various treatment procedures have been employed, and many are based on the application of non-equilibrium gaseous media, especially gaseous plasma. Although such treatments have been studied extensively in past decades and actually commercialized, the exact mechanisms of interaction between reactive gaseous species and solid materials is still inadequately understood. This special issue provides recent trends in nanostructuring and functionalization of solid materials with the goal of improving their functional properties.

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Section: This Special Issuementioning

confidence: 99%

Surface Modification to Improve Properties of Materials

Mozetič

2019

Materials

168

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“…Si can be used to make wafers of high purity without defects. These features enable Si to be a critical element for fabricating various semiconductor devices . In particular, Si is an ideal semiconductor for construction of broadband photodetectors due to its small bandgap, superior light‐trapping ability, and fast charge transport.…”

Section: Introductionmentioning

confidence: 99%

“…These features enable Si to be a critical element for fabricating various semiconductor devices. [13][14][15] In particular, Si is an ideal semiconductor for construction of broadband photodetectors due to its small bandgap, superior light-trapping ability, and fast charge transport. Si photodetectors are commercially utilized for light photodetection in the UV to near-infrared (NIR) region.…”

Section: Introductionmentioning

confidence: 99%

Low‐dimensional nanomaterial/Si heterostructure‐based photodetectors

Tian

Sun

Chen

et al. 2019

InfoMat

102

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Due to its excellent electrical and optical features, silicon (Si) is highly attractive for photodetector applications. The design and fabrication of low‐dimensional semiconductor/Si hybrid heterostructures provide a great platform for fabricating high‐performance photodetectors, thereby overcoming the inherent limitations of Si. This review focuses on state‐of‐the‐art Si heterostructure‐based photodetectors. It starts with the introduction of three different device configurations, that is, photoconductors, photodiodes, and phototransistors. Their working mechanisms and relative pros and cons are introduced, and the figures of merit of photodetectors are summarized. Then, we discuss the device physics/design, photodetection performance, and optimization strategies for Si‐based photodetectors. Finally, future challenges in the photodetector applications of Si‐based hybrid heterostructures are discussed.

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“…Additionally, it has been shown that hydride groups are strong reducing agents that make the surface incompatible to conjugate with many biological or non-biological materials 33 . Hence, surface passivation of PSi is a critical step to stable its surface for application at biological research fields 34 . Thus, the fresh PSi samples were modified as reported in the "PSi surface modification" section.…”

Section: Resultsmentioning

confidence: 99%

A lectin-coupled porous silicon-based biosensor: label-free optical detection of bacteria in a real-time mode

Yaghoubi

Rahimi

Negahdari

et al. 2020

Sci Rep

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Accuracy and speed of detection, along with technical and instrumental simplicity, are indispensable for the bacterial detection methods. Porous silicon (PSi) has unique optical and chemical properties which makes it a good candidate for biosensing applications. On the other hand, lectins have specific carbohydrate-binding properties and are inexpensive compared to popular antibodies. We propose a lectin-conjugated PSi-based biosensor for label-free and real-time detection of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) by reflectometric interference Fourier transform spectroscopy (RIFTS). We modified meso-PSiO2 (10–40 nm pore diameter) with three lectins of ConA (Concanavalin A), WGA (Wheat Germ Agglutinin), and UEA (Ulex europaeus agglutinin) with various carbohydrate specificities, as bioreceptor. The results showed that ConA and WGA have the highest binding affinity for E. coli and S. aureus respectively and hence can effectively detect them. This was confirmed by 6.8% and 7.8% decrease in peak amplitude of fast Fourier transform (FFT) spectra (at 105 cells mL−1 concentration). A limit of detection (LOD) of about 103 cells mL−1 and a linear response range of 103 to 105 cells mL−1 were observed for both ConA-E. coli and WGA-S. aureus interaction platforms that are comparable to the other reports in the literature. Dissimilar response patterns among lectins can be attributed to the different bacterial cell wall structures. Further assessments were carried out by applying the biosensor for the detection of Klebsiella aerogenes and Bacillus subtilis bacteria. The overall obtained results reinforced the conjecture that the WGA and ConA have a stronger interaction with Gram-positive and Gram-negative bacteria, respectively. Therefore, it seems that specific lectins can be suggested for bacterial Gram-typing or even serotyping. These observations were confirmed by the principal component analysis (PCA) model.

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A Mini Review: Recent Advances in Surface Modification of Porous Silicon

Cited by 56 publications

References 68 publications

Surface Modification to Improve Properties of Materials

Surface Modification to Improve Properties of Materials

Low‐dimensional nanomaterial/Si heterostructure‐based photodetectors

A lectin-coupled porous silicon-based biosensor: label-free optical detection of bacteria in a real-time mode

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