Adsorption of aromatic hydrocarbons in nonaromatic media on carbon black

Waarden, M. van der

doi:10.1016/0095-8522(51)90015-3

Cited by 42 publications

(10 citation statements)

References 7 publications

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“…[1][2][3][4][5][6] Some of the first quantitative treatments of polymer brushes were reported by Alexander, 7 de Gennes, 8 and Semenov. 9 All these reports introduced theoretical approaches to study polymer brushes.…”

Section: Introductionmentioning

confidence: 99%

A structural definition of polymer brushes

Brittain

Minko

2007

J. Polym. Sci. A Polym. Chem.

565

652

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ABSTRACT:In this article, we consolidate several literature reports in an attempt to provide a structural definition of a polymer brush as a tethered polymer layer with a high grafting density of polymer chains. We will try to distinguish a brush from grafted polymer layers and coated layers and provide a reasonable approach to the description of the brush regime with a single parameter S-reduced grafting density. Furthermore, we will attempt to describe the relevance of this description to applications. This article is timely given the continuing interest relating to brushes on flat substrates, nanoparticles, and the walls of micro-channels.

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Section: Introductionmentioning

confidence: 99%

A structural definition of polymer brushes

Brittain

Minko

2007

J. Polym. Sci. A Polym. Chem.

565

652

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“…Polycyclic aromatic compounds with short alkyl chains can be selectively adsorbed by carbon black nanoparticles. 58 Our results suggest that π−π interactions are more significant than electrostatic repulsion for CV absorption to the particles.…”

Section: Resultsmentioning

confidence: 65%

Carbon Black Templated Gold Nanoparticles for Detection of a Broad Spectrum of Analytes by Surface-Enhanced Raman Scattering

Abbasi

Oliveira

Bothun

et al. 2020

ACS Appl. Nano Mater.

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Surface-enhanced Raman scattering (SERS) is a powerful tool for detection of analytes at low concentrations. Because the electric field generated by surface plasmons decays exponentially with distance, the analyte must be in close proximity to the substrate to generate a measurable Raman signal. This often requires customization of the substrate for a specific subset of molecules. We have produced hybrid carbon−gold nanoparticles for the detection of a broad spectrum of molecules using SERS. Carboxyl-terminated carbon black (CB) nanoparticles were coated with the cationic polyelectrolyte poly(L-lysine) (PLL) and exposed to a tetrachloroauric acid solution. Gold−carbon black (Au-PLLCB) particles were formed by the reduction of gold chloride ions that concentrated on the surfaces of the PLL-coated CB templates. The Au-PLLCB particles produced strong SERS signals for 4-nitrobenzenethiol (4-NBT) in ethanol and for Congo red, crystal violet, and nitrate and sulfate ions in water. The underlying morphology of the carbon black template and the presence of PLL promoted the formation of highly curved gold structures on the surface, yielding hot spots for Raman enhancement. The underlying carbon acted as an absorbent for organic molecules, allowing analytes with poor affinity for the gold surface to concentrate in regions close enough to the particle surfaces to enable detection by SERS. The morphology and chemical nature of the underlying template make the Au-PLLCB particles applicable for SERS-based detection of a wide range of analytes in solution. KEYWORDS: surface-enhanced Raman spectroscopy (SERS), gold−carbon black nanoparticles, SERS-based sensor, analyte detection, nanosensor

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“…Ion-ion ini akan terikat kuat pada permukaan zarah kerana mempunyai interaksi secara langsung dengan zarah dan membentuk satu lapisan ion mengelilingi zarah. Lapisan ion ini dikenali sebagai lapisan Stern [19][20]. Proses penjerapan ion-ion sulfonat (SO 3 -) pada permukaan zarah seramik alumina, zirkonia dan magnesia ini boleh digambarkan seperti dalam Rajah 5, Rajah 6 dan Rajah 7.…”

Section: Ketumpatan Jasad Anum Dan Jasad Tersinterunclassified

“…Maka kestabilan di dalam sistem koloid dapat diperoleh. Menurut kajian terdahulu [19], kesan penolakan di antara zarah boleh ditingkatkan lagi sekiranya molekul dengan rantaian yang lebih panjang menjerap pada permukaan zarah berkenaan.…”

Section: Mekanisme Penyerakanunclassified

Mekanisme Penyerakan Zarah dalam Pemprosesan Berkoloid Oksida Seramik (Al2O3–ZrO2–MgO) Menggunakan DAXAD 19TM

Muchtar¹,

Osman²,

Tasirin³

2012

Jurnal Teknologi

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Dalam kajian ini, kesan agen penyerak komersil Daxad 19TM terhadap sifat reologi dan pemadatan ampaian seramik alumina–zirkonia–magnesia telah dikenalpasti. Komposisi serbuk yang digunakan adalah berasaskan kepada 85% isipadu alumina (ketulenan 99.99%) dan 15% isipadu zirkonia (ketulenan 99.5%). Penambahan serbuk magnesia (ketulenan 99.99%) pula adalah pada kuantiti yang kecil iaitu 0.25% berat daripada jumlah berat alumina dan zirkonia. Untuk mengelakkan masalah pengaglomeratan zarah, teknik pemprosesan berkoloid dipilih dalam pembikinan sampel. Untuk ini, Daxad 19TM dicampurkan ke dalam ampaian dengan tujuan untuk menyerakkan zarah. Kuantiti penyerak Daxad 19TM yang digunakan ialah dalam julat 0 hingga 0.60% berat. Kajian reologi menggunakan alat meter kelikatan dilakukan bagi mengenalpasti kuantiti Daxad 19TM yang optimum bagi penyerakan zarah. Setelah itu, sampel anum dihasilkan melalui proses penuangan buburan. Sampel diprasinter pada suhu 800°C selama 45 minit sebelum disinter pada suhu 1600°C selama 2 jam. Kajian ini secara keseluruhannya telah mendapati julat penggunaan optimum penyerak Daxad 19TM di dalam ampaian seramik yang dihasilkan adalah di antara 0.4875% hingga 0.525% berat daripada berat keseluruhan serbuk seramik yang digunakan. Kertas ini juga membincangkan mekanisme penyerakan zarah dalam ampaian alumina–zirkonia–magnesia melalui penggunaan Daxad 19TM. Kata kunci: Penyerakan zarah, reologi, ketumpatan, alumina, zirkonia The effects of a commercially available dispersant, Daxad 19TM, on the rheology and densification characteristics of alumina–zirconia–magnesia suspensions have been investigated. The compositions of powders used are based on 85% volume of alumina (99.99% purity) and 15% volume of zirconia (99.95% purity). The addition of a small amount of magnesia is based on 0.25% weight of the combined weight of both alumina and zirconia powders. In an effort to avoid the agglomeration of particles, colloidal processing technique is used to produce samples. For this, Daxad 19TM is added to the suspensions to disperse the oxide particles. The Daxad 19TM addition is within the range of 0–0.60% weight. Rheological investigation is carried out using a rotational viscometer to determine the optimum quantity of dispersant (Daxad 19TM) that can best disperse the powders. Green samples are then prepared using the slip casting process. The sample are pre–sintered at a constant temperature of 800°C for 45 minutes before being sintered at 1600°C with a holding time of 2 hours. The optimum concentration of Daxad 19TM for a successful dispersion of powders is found to be between 0.4875–0.525% weight of the combined weight of alumina and zirconia powders. This paper also discusses the mechanisms for particle dispersion in alumina–zirconia–magnesia suspensions. Key words: Particle dispersion, rheology, density, alumina, zirconia

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Adsorption of aromatic hydrocarbons in nonaromatic media on carbon black

Cited by 42 publications

References 7 publications

A structural definition of polymer brushes

A structural definition of polymer brushes

Carbon Black Templated Gold Nanoparticles for Detection of a Broad Spectrum of Analytes by Surface-Enhanced Raman Scattering

Mekanisme Penyerakan Zarah dalam Pemprosesan Berkoloid Oksida Seramik (Al<sub>2</sub>O<sub>3</sub>–ZrO<sub>2</sub>–MgO) Menggunakan DAXAD 19<sup>TM</sup>

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