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Structure, Morphology and Absorption Characteristics of Gold Nanoparticles Produced via PLAL Method: Role of Low Energy X-ray Dosage
Surfaces and Interfaces ( IF 5.7 ) Pub Date : 2021-04-24 , DOI: 10.1016/j.surfin.2021.101139
Pegah Moradi Khaniabadi , Naser M Ahmed , Mohammed Ali Dheyab , Azlan Abdul Aziz , M.A. Almessiere

This paper reports the effects of low energy X-ray irradiation doses on the structures, morphologies and absorbance of some colloidal gold nanoparticles (AuNPs) produced in distilled water via the one-step pulse laser ablation in liquid (PLAL) method. An Nd:YAG pulse laser (wavelength of 1064 nm and fluence range of 0.076 -7.692 J/cm 2) was used to ablate the gold plate surface (acted as a target) immersed in distilled water (10 mL). The laser pulse duration was adjusted to 2.5 min (1000 pulses), 5 min (2000 pulses). Simultaneously, the colloidal suspension was irradiated with low energy X-ray. The obtained samples were characterized thoroughly using different analytical instruments. High quality, pure, surfactant-free AuNPs with well-defined morphology and broad size distribution were achieved. The recorded values of the Zeta potential of the as-synthesized AuNPs were increased from -33.1 to -41.2 mV which was mainly due to the low energy X-ray dose-mediated photo- and Auger- electrons generation plus the fragmentation of the bigger NPs into highly stable tinier species inside the colloidal suspension. The observed blue-shift in the absorbance peaks of the NPs centered at 523, 529, and 526 nm irradiated with the corresponding fluences of 0.076, 3.846, and 7.692 J/cm 2 was ascribed to the quantum size effects. It is established that the synergy between laser ablation and low energy X-ray does may be effective to prepare the contaminants-free AuNPs in the liquid suspension in a simple rapid and cost-effective way.



中文翻译:

PLAL法制备金纳米颗粒的结构,形态和吸收特性:低能X射线剂量的作用

本文报道了低能X射线辐照剂量对通过单步脉冲激光烧蚀液体(PLAL)方法在蒸馏水中产生的某些胶体金纳米颗粒(AuNPs)的结构,形态和吸收率的影响。使用Nd:YAG脉冲激光(波长为1064 nm,注量范围为0.076 -7.692 J / cm 2)烧蚀浸入蒸馏水(10 mL)中的金板表面(作为靶)。将激光脉冲持续时间调整为2.5分钟(1000个脉冲),5分钟(2000个脉冲)。同时,用低能X射线照射胶体悬浮液。使用不同的分析仪器对获得的样品进行全面表征。获得了高质量,纯净,不含表面活性剂的AuNP,具有明确的形态和宽广的尺寸分布。合成的AuNPs的Zeta电位的记录值从-33.1增加到-41.2 mV,这主要是由于低能X射线剂量介导的光电子和俄歇电子的产生以及较大NPs的断裂进入胶体悬浮液中的高度稳定的微小物种。观察到的以0.076、3.846和7.692 J / cm 2的相应通量辐照的,以523、529和526 nm为中心的NP的吸收峰的蓝移归因于量子尺寸效应。可以确定的是,激光烧蚀和低能X射线之间的协同作用确实可以有效地以简单快速且经济高效的方式制备液体悬浮液中的无污染物AuNPs。2 mV,这主要是由于低能量X射线剂量介导的光电子和俄歇电子的产生,以及较大的NP碎裂为胶体悬浮液内部的高度稳定的着色剂。观察到的以0.076、3.846和7.692 J / cm 2的相应通量辐照的,以523、529和526 nm为中心的NP的吸光度峰中的蓝移归因于量子尺寸效应。可以确定的是,激光烧蚀和低能X射线之间的协同作用确实可以有效地以简单快速且经济高效的方式制备液体悬浮液中的无污染物AuNPs。2 mV,这主要是由于低能量X射线剂量介导的光电子和俄歇电子的产生,再加上较大的NP碎裂成胶体悬浮液内的高度稳定的着色剂。观察到的以0.076、3.846和7.692 J / cm 2的相应通量辐照的,以523、529和526 nm为中心的NP的吸收峰的蓝移归因于量子尺寸效应。可以确定的是,激光烧蚀和低能X射线之间的协同作用确实可以有效地以简单快速且经济高效的方式制备液体悬浮液中的无污染物AuNPs。分别以0.076、3.846和7.692J / cm 2的注量辐照的526nm和526nm归因于量子尺寸效应。可以确定的是,激光烧蚀和低能X射线之间的协同作用确实可以有效地以简单快速且经济高效的方式制备液体悬浮液中的无污染物AuNPs。分别以0.076、3.846和7.692J / cm 2的注量辐照的526nm和526nm归因于量子尺寸效应。可以确定的是,激光烧蚀和低能X射线之间的协同作用确实可以有效地以简单快速且经济高效的方式制备液体悬浮液中的无污染物AuNPs。

更新日期:2021-04-26
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