相关实验视频

Updated: May 23, 2025

Synthesis and Characterization of Amphiphilic Gold Nanoparticles

Synthesis and Characterization of Amphiphilic Gold Nanoparticles

Published on: July 2, 2019

基于黄金上的醇和终端基单层的水解,热和电化学稳定性:一项比较研究

Zhen Yang^1,2, Sidharam P Pujari², Rachel Armstrong¹

¹imec within OnePlanet Research Center, Bronland 10, 6708 WH Wageningen, The Netherlands.

Langmuir : the ACS journal of surfaces and colloids

|March 11, 2025

概括

终端金债券为生物传感器提供了新的可能性. 虽然它们的稳定性略低于醇-黄金键,但它们的水解,热和电化学稳定性足以应用于许多应用,多价值增强了性能.

科学领域:

表面化学表面化学
纳米技术纳米技术
生物感应是一种生物感应.

背景情况:

终端基因-金相互作用是金表面有机单层的新奇动机.
这些相互作用对生物传感中的防层和识别元素具有前景.
与传统的醇黄金债券相比,基黄金债券的长期稳定性不太了解.

研究的目的:

研究终端金键的水解,热和电化学稳定性.
为了比较基黄金单层与醇黄金单层的稳定性.
评估多价值对金接口稳定性的影响.

主要方法:

在金基板上形成了1-octadecanethiol和1-octadecyne的单层.
静态水接触角度测量和X射线光电子光谱学被用来评估水解和热稳定性.
循环电压测量被用来确定电化学氧化脱吸潜力.

主要成果:

黄金上的单价终端基单层表现出比酸盐类型的稳定性略低,这是由于包装密度较低.
水解,热和电化学稳定性测试表明,对于生物传感应用,其强度足够强大.
基于多价基的吸附剂与单价基相比显示出更好的稳定性.

结论:

在某些生物感知环境中,终端基因-黄金相互作用是醇-黄金键的可行替代品.
金接口的稳定性足以适用于肠道生物传感等应用.
多价值是提高金系统稳定性和潜在应用的关键因素.

更多相关视频

Synthesis, Assembly, and Characterization of Monolayer Protected Gold Nanoparticle Films for Protein Monolayer Electrochemistry

Synthesis, Assembly, and Characterization of Monolayer Protected Gold Nanoparticle Films for Protein Monolayer Electrochemistry

Published on: October 4, 2011

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

A Technique to Functionalize and Self-assemble Macroscopic Nanoparticle-ligand Monolayer Films onto Template-free Substrates

Published on: May 9, 2014

相关概念视频

Acidity of 1-Alkynes

Acidity of 1-Alkynes

The acidic strength of hydrocarbons follows the order: Alkynes > Alkenes > Alkanes. The strength of an acid is commonly expressed in units of pKa — the lower the pKa, the stronger the acid. Among the hydrocarbons, terminal alkynes have lower pKa values and are, therefore, more acidic. For example, the pKa values for ethane, ethene, and acetylene are 51, 44, and 25, respectively, as shown here.

Preparation and Reactions of Thiols

Preparation and Reactions of Thiols

Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.

Relative Stabilities of Alkenes

Relative Stabilities of Alkenes

The relative stability of alkenes can be determined by comparing their heats of hydrogenation. The lower heat of hydrogenation indicates the more stable alkene. The three main factors determining the relative stability of alkenes are i) the number of substituents attached to the double-bond carbon atoms, ii) hyperconjugation, and iii) the stereochemistry of the double bond.

Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation

Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation

Introduction
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.

Preparation of Alkynes: Alkylation Reaction

Preparation of Alkynes: Alkylation Reaction

Introduction
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.