Effect of surfactant and electrolyte on surface modification of c-plane GaN substrate using chemical mechanical planarization (CMP) process

J of Separation Science

Bai

et al. 2017

The coadsorption of mixed anionic-nonionic surfactants, sodium dodecylbenzenesulfonate with Triton X-100, on the surface of eggshell membrane was investigated based on adsorption isotherms to improve the solid-phase extraction performance of eggshell membrane toward organic contaminants. Results showed that even though excess Triton X-100 might inhibit the adsorption of sodium dodecylbenzenesulfonate, a low dosage of Triton X-100 can significantly improve sodium dodecylbenzenesulfonate modification and enhance the extraction efficiency of eggshell membrane from 73.7 to 100.4% because of the formation of mixed hemimicelles. The highest recovery was achieved at 2:8 (Triton X-100/sodium dodecylbenzenesulfonate mass ratios), and multiple mechanisms involving π-π interactions, hydrophobic effect, and π-π electron donor-acceptor interactions contributed to the strong extraction affinity. When mixed, the Triton X-100 and sodium dodecylbenzenesulfonate modified eggshell membrane packed cartridge coupled with high-performance liquid chromatography was applied for the simultaneous determination of trace Sudan I-IV, and low detection limits (0.16-0.26 ng/L) were achieved with satisfactory linearity (R > 0.999) in 10-10 000 μg/L. For real samples, Sudan II and III in one chilli sauce sample were found at 4.3 and 1.7 μg/kg. Sudan I-IV recoveries at three spiked levels were 87.4-102.9% with precisions <6.8%. Comparison with commonly used solid-phase extraction adsorbents and methods further reflected the superiorities of the proposed adsorbent in sensitivity, retention ability, and applicability.

Section: Resultssupporting

confidence: 76%

Evaluation of a mixed anionic–nonionic surfactant modified eggshell membrane as an advantageous adsorbent for the solid‐phase extraction of Sudan I–IV as model analytes

Liu

J of Separation Science

Bai

et al. 2017

“…In acid slurries, these contaminants must be removed through the subsequent processes, while in alkaline slurries, selecting an appropriate organic base and a suitable complexing agent could effectively prevent the metal pollution. 104–106 Thus, although the extremely thin metamorphic layer is unfavourable for the polishing rate, it is useful to remove surface crystal materials during CMP.…”

Section: Conventional Etchingmentioning

confidence: 99%

Wet etching in β-Ga₂O₃ bulk single crystals

et al. 2022

“…Surfactants can also change the surface properties of nanocarriers, such as their morphology, magnetic properties, dispersion, and catalytic performances (Asghar et al 2016;Bhuvnesh Bharti et al 2012;Huang et al 2011;Junfang et al 2018). This modi cation may result in a new structure with new surface activity due to the combination of hydrophilic groups of surfactants and surface groups of nanocarriers.…”

Section: Surface Modi Cation Of Nanocarriers In the Surfactant Systemmentioning

confidence: 99%

Function Of Surfactants In Immobilization of Cellulase And Multiphase Hydrolysis: A Review

De-yi

et al. 2021

Preprint

Surfactants, especially non-ionic surfactants, play an important role in the preparation of nanocarriers and can also promote the enzymatic hydrolysis of lignocellulose. A broad overview of the current status of surfactants on the immobilization of cellulase is provided in this review. In addition, the restricting factors in cellulase immobilization in the complex multiphase hydrolysis system are discussed, including the carrier structure characteristics, solid-solid contact obstacles, external diffusion resistance, limited recycling frequency, and invalid combination of enzyme active centers. Furthermore, promising prospects of cellulase-oriented immobilization are proposed, including the hydrophilic-hydrophobic interaction of surfactants and cellulase in the oil-water reaction system, the reversed micelle system of surfactants, and the possible oriented immobilization mechanism.