Deep UV patterning of 3-amino-propyl-triethoxy-silane self-assembled molecular layers on alumina

Samantaray, Chandan B.; Hastings, J. T.

doi:10.1116/1.3597437

Cited by 7 publications

(2 citation statements)

References 27 publications

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“…3b illustrates Raman spectra of functionalized surface with APTES molecules. The bands observed in the spectrum are attrib uted to amine group NH 2 (1630 cm À1 ) [22], CH stretch modes of CH 2 groups of APTES molecules (2700 cm À1 ) [24] and NH 2 bending mode (1600 cm À1 ) [25]. Indeed, the main characteristic peaks of the silicon modified with APTES are attributable respectively to n (Si O Si), N (Si OH) and d (Si O Si).…”

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confidence: 92%

Enhancement of the photoluminescence property of hybrid structures using single-walled carbon nanotubes/pyramidal porous silicon surface

Belkhiria

Sahlaoui

Zaghdoudi

et al. 2018

Journal of Alloys and Compounds

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This work presents additional physical results about the enhancement of the photoluminescence property of hybrid structures using single walled carbon nanotubes/pyramidal porous silicon surface, in comparison with what has already been published on these structures in terms of synthesis conditions and FTIR investigations as reported recently by the same authors in Journal of Alloys and Compounds 694 (2017) 1036 1044. Herein, the effect of the single walled carbon nanotubes (SWCNTs) layer on the optical properties of pyramidal Porous Silicon (pPSi) in hybrid SWCNTs/pPSi structure synthetized by chemical and electrochemical etching of silicon wafer was studied. Using both scanning electron mi croscopy (SEM), SWCNTs formed a thin film on pPSi surface and they are partly embedded in its pores. An analysis of Raman spectra for the realized structures confirmed the passivation of pPSi surface by SWCNTs film. The surface bond configurations were also monitored. Moreover, SWCNTs modified Pho toluminescence (PL) spectrum of pPSi by shifting PL peaks towards high energies, showed that the defect created in the materials can result in an efficient and stabilized photoluminescence response on Silicon (Si).

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mentioning

confidence: 92%

Enhancement of the photoluminescence property of hybrid structures using single-walled carbon nanotubes/pyramidal porous silicon surface

Belkhiria

Sahlaoui

Zaghdoudi

et al. 2018

Journal of Alloys and Compounds

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“…155 On the other hand, APTES self-assembly is also used for patterning layers directly on Al2O3 surface in deep-UV patterning. 180…”

Section: Pickering Emulsions and Uv Protection Effectmentioning

confidence: 99%

Selective Detection and Removal of Zinc Oxide Nanoparticles in Contaminated Water

Zhang¹

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Metal oxide nanoparticles (MONPs) are massively produced for various industrial, environmental and biomedical applications due to their high surface reactivity and unique chemical and physical properties. Among all the manufactured MONPs, human exposure to zinc oxide (ZnO) nanoparticles may cause significant health concerns. This leads to a desire for efficient methods for their facile detection in the aqueous environment. In this work, two detection methods and one removal method were developed to selectively detect or remove ZnO nanoparticles in contaminated water with the presence of other MONPs.A detection method based on the fluorescence quenching of meso-tetra(4carboxyphenyl) porphyrin (TCPP) has been developed to treat water samples containing MONPs. Quenching of the TCPP emission intensity at 650 nm provides a Stern-Volmer plot with adequate sensitivity for the detection of 0.15 mg/mL ZnO nanoparticles.Meanwhile, a unique emission peak at 605 nm is observed and can be used for the identification and quantitation of ZnO nanoparticles down to 0.0015 mg/mL. A removal method using 3-aminopropyltriethoxysilane (APTES) has been proved to sediment ZnO nanoparticles in aqueous suspension with TCPP as a color indicator for ZnO. When 2.0% (v) APTES is applied to treat water samples containing ≥ 0.5 mg/mL of ZnO nanoparticles, a web-like sediment adheres onto the glass vial bottom from APTES-ZnO conjugation. A high removal efficiency of over 99% (w) ZnO nanoparticles was attained using APTES.Another detection method has been developed using electroanalytical analysis by firstly drop-casting MONPs on a screen-printed electrode. When phenol is analyzed as a iii chemical probe by cyclic voltammetry (CV), measurement of the reduction current provides adequate sensitivity for the indirect quantitation of 0.1 mg/mL ZnO nanoparticles.Both the oxidation peak and charge storage capacity measured from the cyclic voltammogram are proportional to the ZnO nanoparticle concentration and can afford a better detection limit of 0.01 mg/mL. Overall, the above methods are labour and cost effective and can afford high selectivity towards ZnO detection or removal in the presence of other MONPs.Additionally, the electrochemical analysis method and the APTES sedimentation method can differentiate ZnO nanoparticles from Zn 2+ and zinc peroxide (ZnO2) nanoparticles.iv PrefaceThis preface provides full bibliographical details for each article included in this thesis, as well as whether the article is reproduced in whole or in part. Permission was obtained from the publishers to include the articles in the thesis. When citing material from this thesis, please cite the article relevant to the chapter, if the chapter is based on a publication.Pursuant to the Integrated Thesis policy of Carleton University, the "supervisor" (Edward P.C. Lai) and the "student" (Wenyu Zhang) confirm that the student was fully involved in setting up and conducting the research, obtaining data and analyzing results, as well as preparing and writing the material pres...

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Scanning Probe Microscopy for Nanolithography

Samantaray

2015

Surface Science Tools for Nanomaterials Characterization

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Deep UV patterning of 3-amino-propyl-triethoxy-silane self-assembled molecular layers on alumina

Cited by 7 publications

References 27 publications

Enhancement of the photoluminescence property of hybrid structures using single-walled carbon nanotubes/pyramidal porous silicon surface

Enhancement of the photoluminescence property of hybrid structures using single-walled carbon nanotubes/pyramidal porous silicon surface

Selective Detection and Removal of Zinc Oxide Nanoparticles in Contaminated Water

Scanning Probe Microscopy for Nanolithography

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