Ultrasound enhancing the mass transfer of droplet microreactor for the synthesis of AgInS2 nanocrystals

Zhang, Zongbo; Wang, Kai; Xu, Changbin; Wu, Wenting; Lu, Chunxia; Wang, Xinyang; Rao, Yunlong; Jiang, Chen; Xu, Chunling; Song, Shiliang

doi:10.1016/j.cej.2022.134948

Cited by 20 publications

(7 citation statements)

References 46 publications

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“…The ultrasonics effect involves bubble oscillation, acoustic streaming, and cavitation microstreaming caused by ultrasonics, which enhance mass transfer in the micro liquid channel. This phenomenon has been observed in microreactors through high-speed photography experiments [32][33] By subjecting the electrolyte to alternating compression and decompression at a high frequency, the ultrasonics effect induces the flow of electrolyte. As a result, both the etchants (e. g. MnO À 4 ) and the reaction products (e. g. Ga 3 + , AsO 3À…”

Section: Resultsmentioning

confidence: 89%

Ultrasonic‐Assisted Electrochemical Nanoimprint Lithography: Forcing Mass Transfer to Enhance the Localized Etching Rate of GaAs

Liu

Han

et al. 2023

Chemistry An Asian Journal

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Electrochemical nanoimprint lithography (ECNL) has emerged as a promising technique for fabricating three‐dimensional micro/nano‐structures (3D‐MNSs) directly on semiconductor wafers. This technique is based on a localized corrosion reaction induced by the contact potential across the metal/semiconductor boundaries. The anodic etching of semiconductor and the cathodic reduction of electron acceptors occur at the metal/semiconductor/electrolyte interface and the Pt mold surface, respectively. However, the etching rate is limited by the mass transfer of species in the ultrathin electrolyte layer between the mold and the workpiece. To overcome this challenge, we introduce the ultrasonics effect into the ECNL process to facilitate the mass exchange between the ultrathin electrolyte layer and the bulk solution, thereby improving the imprinting efficiency. Experimental investigations demonstrate a positive linear relationship between the reciprocal of the area duty ratio of the mold and the imprinting efficiency. Furthermore, the introduction of ultrasonics improves the imprinting efficiency by approximately 80 %, irrespective of the area duty ratio. The enhanced imprinting efficiency enables the fabrication of 3D‐MNSs with higher aspect ratios, resulting in a stronger light trapping effect. These results indicate the prospective applications of ECNL in semiconductor functional devices, such as photoelectric detection and photovoltaics.

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Section: Resultsmentioning

confidence: 89%

Ultrasonic‐Assisted Electrochemical Nanoimprint Lithography: Forcing Mass Transfer to Enhance the Localized Etching Rate of GaAs

Liu

Han

et al. 2023

Chemistry An Asian Journal

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“…These ultrasound-induced vortices significantly enhance the mass transfer process of the medium in the microchannel. In addition, our previous work had also revealed that the ultrasonic field could also remarkably promote the mass transfer inside the droplet [37] . Therefore, the mass transfer enhancement of both inside and outside the droplet accelerates the ion renewal rate on the reaction interface.…”

Section: Resultsmentioning

confidence: 93%

Ultrasonic enhancement of microdroplet-based interfacial reaction for improving the synthesis of Ag2S QDs

Zhang

Song

et al. 2023

Ultrasonics Sonochemistry

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“…Ultrasonic chemistry is a novel interdisciplinary approach combining waves' power with chemical methods. [82][83][84][85][86] Hu et al introduced the chemical and physical functions of ultrasound, emphasizing the methods and advantages of ultrasonic-assisted synthesis of electrocatalysts. [87] It possesses several advantages that conventional methods lack, offering a new pathway for the synthesis of nanomaterials and showing great prospects in the field of nanomaterial synthesis technology.…”

Section: The Ultrasonic Chemical Methodsmentioning

confidence: 99%

Ultrasound‐Assisted Preparation and Performance Regulation of Electrocatalytic Materials

Deng,

Chen,

et al. 2024

ChemPlusChem

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With the advancement of scientific research, the introduction of external physical methods not only adds extra freedom to the design of electro‐catalytical processes for green technologies but also effectively improves the reactivity of materials. Physical methods can adjust the intrinsic activity of materials and modulate the local environment at the solid‐liquid interface. In particular, this approach holds great promise in the field of electrocatalysis. Among them, the ultrasonic waves have shown reasonable control over the preparation of materials and the electrocatalytic process. However, the research on coupling ultrasonic waves and electrocatalysis is still early. The understanding of their mechanisms needs to be more comprehensive and deep enough. Firstly, this article extensively discusses the adhibition of the ultrasonic‐assisted preparation of metal‐based catalysts and their catalytic performance as electrocatalysts. The obtained metal‐based catalysts exhibit improved electrocatalytic performances due to their high surface area and more exposed active sites. Additionally, this article also points out some urgent unresolved issues in the synthesis of materials using ultrasonic waves and the regulation of electrocatalytic performance. Lastly, the challenges and opportunities in this field are discussed, providing new insights for improving the catalytic performance of transition metal‐based electrocatalysts.

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Ultrasound enhancing the mass transfer of droplet microreactor for the synthesis of AgInS2 nanocrystals

Cited by 20 publications

References 46 publications

Ultrasonic‐Assisted Electrochemical Nanoimprint Lithography: Forcing Mass Transfer to Enhance the Localized Etching Rate of GaAs

Ultrasonic‐Assisted Electrochemical Nanoimprint Lithography: Forcing Mass Transfer to Enhance the Localized Etching Rate of GaAs

Ultrasonic enhancement of microdroplet-based interfacial reaction for improving the synthesis of Ag2S QDs

Ultrasound‐Assisted Preparation and Performance Regulation of Electrocatalytic Materials

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