{"title":"改性液-液相分离：合成二维氧化铜纳米片的新技术","authors":"Abha Mahajan, Ajay Piriya Vijaya Kumar Saroja, Ramaprabhu Sundara, Rupali Nagar","doi":"10.1007/s10971-025-06750-4","DOIUrl":null,"url":null,"abstract":"<div><p>Two-dimensional materials are seeing an upsurge in research and various applications. In this work, the growth of cupric oxide (CuO) nanostructures with different morphologies is reported by employing <i>modified</i>-liquid-liquid phase separation (<i>m-</i>LLPS) technique. The concept of controlling the point of phase separation in liquid media while the reaction progresses and its influence on morphology has been investigated. This has been achieved by using two binary phases, namely copper sulfate-polyethylene glycol (PEG) (C&P) and sodium hydroxide-PEG (N&P) in tandem, resulting in reduction of the copper salt to copper oxide. Sheet-like agglomerated growth could be restrained into well-formed, flattened disks by merely controlling the interaction of the binary phases in time. X-ray diffraction (XRD), UV-Visible spectroscopy, micro-Raman spectroscopy and Fourier Transform Infrared spectroscopy (FTIR) were employed to characterize the materials obtained. The flat CuO nanosheets were used for detection of glucose. The limit of detection and limit of quantification levels were found to be 4 mM and 13 mM, respectively. The mechanism of the <i>m</i>-LLPS method leading to an oriented growth as compared to the natural disoriented growth is discussed. This study demonstrates a very simple concept of phase separation to prepare two-dimensional materials.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"115 2","pages":"985 - 997"},"PeriodicalIF":3.2000,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Modified-liquid-liquid phase separation: a novel technique to synthesize 2-dimensional CuO nanosheets\",\"authors\":\"Abha Mahajan, Ajay Piriya Vijaya Kumar Saroja, Ramaprabhu Sundara, Rupali Nagar\",\"doi\":\"10.1007/s10971-025-06750-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Two-dimensional materials are seeing an upsurge in research and various applications. In this work, the growth of cupric oxide (CuO) nanostructures with different morphologies is reported by employing <i>modified</i>-liquid-liquid phase separation (<i>m-</i>LLPS) technique. The concept of controlling the point of phase separation in liquid media while the reaction progresses and its influence on morphology has been investigated. This has been achieved by using two binary phases, namely copper sulfate-polyethylene glycol (PEG) (C&P) and sodium hydroxide-PEG (N&P) in tandem, resulting in reduction of the copper salt to copper oxide. Sheet-like agglomerated growth could be restrained into well-formed, flattened disks by merely controlling the interaction of the binary phases in time. X-ray diffraction (XRD), UV-Visible spectroscopy, micro-Raman spectroscopy and Fourier Transform Infrared spectroscopy (FTIR) were employed to characterize the materials obtained. The flat CuO nanosheets were used for detection of glucose. The limit of detection and limit of quantification levels were found to be 4 mM and 13 mM, respectively. The mechanism of the <i>m</i>-LLPS method leading to an oriented growth as compared to the natural disoriented growth is discussed. This study demonstrates a very simple concept of phase separation to prepare two-dimensional materials.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":664,\"journal\":{\"name\":\"Journal of Sol-Gel Science and Technology\",\"volume\":\"115 2\",\"pages\":\"985 - 997\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-04-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sol-Gel Science and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10971-025-06750-4\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-025-06750-4","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Modified-liquid-liquid phase separation: a novel technique to synthesize 2-dimensional CuO nanosheets
Two-dimensional materials are seeing an upsurge in research and various applications. In this work, the growth of cupric oxide (CuO) nanostructures with different morphologies is reported by employing modified-liquid-liquid phase separation (m-LLPS) technique. The concept of controlling the point of phase separation in liquid media while the reaction progresses and its influence on morphology has been investigated. This has been achieved by using two binary phases, namely copper sulfate-polyethylene glycol (PEG) (C&P) and sodium hydroxide-PEG (N&P) in tandem, resulting in reduction of the copper salt to copper oxide. Sheet-like agglomerated growth could be restrained into well-formed, flattened disks by merely controlling the interaction of the binary phases in time. X-ray diffraction (XRD), UV-Visible spectroscopy, micro-Raman spectroscopy and Fourier Transform Infrared spectroscopy (FTIR) were employed to characterize the materials obtained. The flat CuO nanosheets were used for detection of glucose. The limit of detection and limit of quantification levels were found to be 4 mM and 13 mM, respectively. The mechanism of the m-LLPS method leading to an oriented growth as compared to the natural disoriented growth is discussed. This study demonstrates a very simple concept of phase separation to prepare two-dimensional materials.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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