Carbon dots(CDs)with intriguing fluorescent property,good biocompatibility,high stability,easy interaction with substrates,are burgeoning carbon nanoparticles with large potential in various applications.Incorporating...Carbon dots(CDs)with intriguing fluorescent property,good biocompatibility,high stability,easy interaction with substrates,are burgeoning carbon nanoparticles with large potential in various applications.Incorporating CDs into the polymer matrix is becoming a popular strategy to endow the complex with new functions.Herein,the green-synthesized CDs was integrated into the mixture of gelatin(derived from waste fish scale)and chitosan,and a multifunctional bio-nanocomposite(defined as Gelatin/Chitosan/CDs)film was developed,which showed the excellent antibacterial,antioxidant,pH-sensitivity,UV shielding,and blue-emission properties.The effects of different concentrations of CDs on the physical,mechanical,structural,and functional activity of bio-nanocomposite film were tested.Compared with the Gelatin/Chitosan film,the Gelatin/Chitosan/CDs film with an optimum addition of 20%CDs showed the enhanced antibacterial,antioxidant as well as UV shielding activities.More importantly,it was used as an effective packaging material for fish meat preservation,reducing the loss of nutritional quality consumption,extending the shelf life of food.Besides,the bio-nanocomposite films also possessed the anti-counterfeiting and pH-responsive properties due to the strong fluorescent emission of CDs,and had the great potential in developing the intelligent packaging materials.Our work shed new light on the new application of CDs and the synthesis of bio-nanocomposite film in food industry.展开更多
The interaction between light and materials is key to physically-based realistic rendering.However,it is also complex to analyze,especially when the materials contain a large number of details and thus exhibit"gl...The interaction between light and materials is key to physically-based realistic rendering.However,it is also complex to analyze,especially when the materials contain a large number of details and thus exhibit"glinty"visual effects.Recent methods of producing glinty appearance are expected to be important in next-generation computer graphics.We provide here a comprehensive survey on recent glinty appearance rendering.We start with a definition of glinty appearance based on microfacet theory,and then summarize research works in terms of representation and practical rendering.We have implemented typical methods using our unified platform and compare them in terms of visual effects,rendering speed,and memory consumption.Finally,we briefly discuss limitations and future research directions.We hope our analysis,implementations,and comparisons will provide insight for readers hoping to choose suitable methods for applications,or carry out research.展开更多
基金the support from the Fujian Provincial Department of Science and Technology(Nos.2019H0023,2020J01218,2020J01774)the Quanzhou City Science&Technology Program(No.2018CT004)。
文摘Carbon dots(CDs)with intriguing fluorescent property,good biocompatibility,high stability,easy interaction with substrates,are burgeoning carbon nanoparticles with large potential in various applications.Incorporating CDs into the polymer matrix is becoming a popular strategy to endow the complex with new functions.Herein,the green-synthesized CDs was integrated into the mixture of gelatin(derived from waste fish scale)and chitosan,and a multifunctional bio-nanocomposite(defined as Gelatin/Chitosan/CDs)film was developed,which showed the excellent antibacterial,antioxidant,pH-sensitivity,UV shielding,and blue-emission properties.The effects of different concentrations of CDs on the physical,mechanical,structural,and functional activity of bio-nanocomposite film were tested.Compared with the Gelatin/Chitosan film,the Gelatin/Chitosan/CDs film with an optimum addition of 20%CDs showed the enhanced antibacterial,antioxidant as well as UV shielding activities.More importantly,it was used as an effective packaging material for fish meat preservation,reducing the loss of nutritional quality consumption,extending the shelf life of food.Besides,the bio-nanocomposite films also possessed the anti-counterfeiting and pH-responsive properties due to the strong fluorescent emission of CDs,and had the great potential in developing the intelligent packaging materials.Our work shed new light on the new application of CDs and the synthesis of bio-nanocomposite film in food industry.
基金partially supported by the National Key R&D Programof Chinaunder Grant No.2020YFB1708900the National Natural Science Foundation of China under Grant No.61872223the Shandong Provincial Natural Science Foundation of China under Grant No.ZR2020LZH016.
文摘The interaction between light and materials is key to physically-based realistic rendering.However,it is also complex to analyze,especially when the materials contain a large number of details and thus exhibit"glinty"visual effects.Recent methods of producing glinty appearance are expected to be important in next-generation computer graphics.We provide here a comprehensive survey on recent glinty appearance rendering.We start with a definition of glinty appearance based on microfacet theory,and then summarize research works in terms of representation and practical rendering.We have implemented typical methods using our unified platform and compare them in terms of visual effects,rendering speed,and memory consumption.Finally,we briefly discuss limitations and future research directions.We hope our analysis,implementations,and comparisons will provide insight for readers hoping to choose suitable methods for applications,or carry out research.
