#li yuanbo

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YVMIN SS23 ‘Paradise’ Campaign by Li Yuanbo

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Cacien photographed by Yuanbo Li for CFIERCE

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YVMIN SS23 ‘Paradise’ Campaign by Li Yuanbo with Chen Xue

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yvmin ss23 photographed by yuanbo li

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Li, Yuanbo, photographer. Rabbit on Midsummer Night. Photograph. From Yvmin_Official on Instagram. https://www.instagram.com/p/Cmy778BySzB/

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yvmin ss23 photographed by yuanbo li

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Engineering single-molecule fluorescence with asymmetric nano-antennas

(a) Schematic of double-bar nano-antenna layered with AIEE1000 particles (black double ended arrows) in PMMA (light blue) on glass substrate (light grey). Inset reveals the chemical structure of AIEE1000. (b-g) SEM pictures of produced nano-antennas with various bar-lengths. Credit: Wenqi Zhao, Xiaochaoran Tian, Zhening Fang, Shiyi Xiao, Meng Qiu, Qiong He, Wei Feng, Fuyou Li, Yuanbo Zhang, Lei Zhou, and Yan-Wen Tan

NIR fluorescence has actually revealed excellent prospective in bioscience, however low quantum-yield has mainly impeded research study on many NIR fluorophores. Here, researchers in China usage asymmetric plasmonic nano-antennas to considerably improve an NIR color’s single-molecule fluorescence strength. The asymmetry offers an extra tuning criterion that provides brand-new possibilities to regulate near-field and far-field homes of the plasmonic modes, consequently enhancing fluorescence without jeopardizing the particle’s photostability. This work offers a universal plan for engineering NIR single-molecule fluorescence.

Single-particle fluorescence detection (SMFD) has the ability to probe, one particle at a time, dynamical procedures that are essential for comprehending practical systems in biosystems. Fluorescence in the near-infrared (NIR) provides better signal to sound ratio (SNR) by decreasing the scattering, absorption and autofluorescence from biological cellular or tissue samples, and for that reason, offers high imaging resolution with increased tissue penetration depths that are essential for biomedical applications. However, many NIR-emitters struggle with low quantum yield and the weak NIR fluorescence signal makes the detection incredibly hard.

Plasmonic nanostructures can transforming localized electro-magnetic energy into totally free radiation and vice versa. This ability makes them effective nano-antennas for regulating molecular fluorescence. The plasmonic nano-antenna normally boosts the fluorescence of a close-by particle by improving the excitation rate and the quantum yield of the particle. In order to efficiently improve the fluorescence, the plasmonic mode of the nano-antenna needs to 1) couple highly to the particle and 2) radiate highly to totally free space. Simultaneously pleasing the 2 requirements positions an obstacle that is difficult to get rid of in traditional, symmetric plasmonic nanostructures.

(a) Histogram of fluorescence improvement with asymmetric double-bar antennas. Each pie chart reveals the circulation of fluorescence improvement originating from particles near asymmetric double-bar antennas with various bar-lengths. Maximums of simulated improvement are suggested with blue dash-dotted lines (b) Fluorescence picture of AIEE1000 in PMMA without antennas. (c) Fluorescence picture of asymmetric antenna (left-half) and symmetric antenna (right-half) selection layered with AIEE1000 in PMMA. Credit: Wenqi Zhao, Xiaochaoran Tian, Zhening Fang, Shiyi Xiao, Meng Qiu, Qiong He, Wei Feng, Fuyou Li, Yuanbo Zhang, Lei Zhou, and Yan-Wen Tan

In a brand-new paper released in Light Science & Applications, researchers from the State Key Laboratory of Surface Physics, Physics Department of Fudan University, China, develops an unique, universal technique to improve single-molecule fluorescence in the NIR routine without jeopardizing the particle’s photostability.

They construct asymmetric nano-antennas including 2 bars with unequal lengths (Fig. 1) that offer several plasmonic modes with tunable resonance frequencies matching both excitation and emission frequencies of the fluorophore. The included tuning criterion, i.e., the ratio of the bar lengths, in such asymmetric structures provides brand-new possibilities to regulate the near-field and far-field homes of the plasmonic modes, consequently additional enhancing both excitation and emission procedures. As an outcome, they experimentally obtain a single-molecule fluorescence improvement aspect approximately 405 (Fig. 2), and the matching theoretical computations show the quantum yield can be as high as 80%. Because the quantum yield plays a significant function in this setup, this improvement is attained without compromising the particles’ survival time under laser irradiation.

Measurement of whitening time on glass as a function of excitation power density shows an inverted proportional relationship (grey squares and grey line). While whitening time of particles on antenna-array are all longer than matching ones on glass (color signs represent whitening times on matching structure). Credit: Wenqi Zhao, Xiaochaoran Tian, Zhening Fang, Shiyi Xiao, Meng Qiu, Qiong He, Wei Feng, Fuyou Li, Yuanbo Zhang, Lei Zhou, and Yan-Wen Tan

In addition, compared with recommendation groups of particles found on glass substrate, the authors have actually observed a substantially increased photobleaching time in particles found around asymmetric double-bar nano-antennas (Fig. 3), showing a much greater variety of fluorescence photons given off by those particles. The nano-antennas are, for that reason, able to considerably reduce photobleaching. Because the regional field improvement does not enhance photostability, the suppression comes generally from the increased quantum yield as an outcome of competitors in between photobleaching rate and energy transfer rate to antenna.

‘Nanotorch’ highlights ultrafast biochemical responses

More details: Wenqi Zhao et al, Engineering single-molecule fluorescence with asymmetric nano-antennas, Light: Science & Applications (2021). DOI: 10.1038/s41377-021-00522-9

Provided by Chinese Academy of Sciences

Citation: Engineering single-molecule fluorescence with asymmetric nano-antennas (2021, April 23) obtained 25 April 2021 from https://phys.org/news/2021-04-single-molecule-fluorescence-asymmetric-nano-antennas.html

This file undergoes copyright. Apart from any reasonable dealing for the function of personal research study or research study, no part might be recreated without the composed authorization. The material is attended to details functions just.

New post published on: https://livescience.tech/2021/04/26/engineering-single-molecule-fluorescence-with-asymmetric-nano-antennas/

[architectnews]

Syracuse University presents eight models based on a Qing dynasty map of Beijing

An industrial building transformed into a vibrant art gallery and an entertainment centre referencing Russian constructivist architecture are included in Dezeen's latest school show by students at Syracuse University.

Syracuse University presents eight models as part of The Complete Map of Capital Beijing, which is based on a Qing dynasty-era map of the city.

The students initially drew a two-dimensional diorama, then designed architectural models inspired by both Eastern and Western buildings.

Syracuse University

School: Syracuse University Courses: The Complete Map of Capital Beijing, ARC 407 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong and Zhang Yuanbo

School statement:

"In the academic year 2020-2021, Syracuse Architecture offered in-person studios and related courses to more than 100 students unable to return to Syracuse, NY, from China.

"Studios were located in Beijing, Shanghai and Shenzhen. In spring 2021, Li Han and Hu Yan led an option studio in Beijing to design 'The Complete Map of Capital Beijing' a large-format diorama based on an original Qing Dynasty era map of the city.

"The diorama consists of a two-dimensional, 1:100 scale 'copy' of an original Qing Dynasty map, drawn by the students, as well as models made by using style-transfer algorithms to collage building sources drawn from both contemporary Western architecture and contemporary Beijing vernacular sources.

"After the final review, the diorama was constructed and exhibited at the Shanzhongtian Art Centre in Beijing in a show curated by renowned curator Cui Cancan."

Casa de Metallica by Zhang Yaqi and Liu Yian

"Casa de Metallica uses as its source the Umlauftank or 'Pinkpipe' designed by Ludwig Leo built in Berlin in the 1970s. It is designed as a contemporary art gallery for Beijing. The students were intrigued by Leo's use of colour to transform an industrial building situated in a dreary harbour landscape into a playful, vibrant form.

"It breaks from its typological moorings to offer a pop art-inflected alternative where radically different realities can co-exist. Similarly, Casa de Metallica uses the art gallery typology to juxtapose the gritty reality of contemporary life in Beijing with contemporary art practice and art gallery culture."

Students: Zhang Yaqi and Liu Yian Course: The Complete Map of Capital Beijing, ARC 407, B.Arch. '23 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong and Zhang Yuanbo Photographer: Wang Hongyue

Chamber of Pigeon by Wang Kexin and Yang Zhexu

"The Chamber of Pigeon is a community centre situated in a Hutong area near the Forbidden City in Beijing. Designed as a multi-generational, multi-use facility, the centre embraces the scale and ambience of the Hutong area. It features a tea house and Mahjong parlour on the roof and areas for relaxing and eating.

"The building source is St Peter's Church by Sigurd Lewerenstz, an enigmatic, earthy brick structure built in Malmö, Sweden, in the 1960s. The Chamber of Pigeon is a colourful, playful variation on the church, and features roof windows, doors and brick patterns found in vernacular Hutong structures."

Students: Wang Kexin and Yang Zhexu Course: The Complete Map of Capital Beijing, ARC 407, B.Arch. '23 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong and Zhang Yuanbo Photographer: Wang Hongyue

Curtained Cave by Feng Yiqun and Tang Xinyu

"Similarly to Beijing architect Kauzuo Shinohara's attempt to use architecture to catalogue and connect the proliferating chaos of the city, The Curtained Cave uses the experimental K2 Building 1990.

"Taking inspiration from Shinohara's interest in this chaos, the students made use of two building elements found in many parts of Beijing – illegal balconies and security windows – which then transformed into new building elements.

"Unlike Shinohara, who insisted on a clear distinction between building and city, the students wanted to entangle the city and building, and they did so by including the elements mentioned above as well as bicycles and racks as part of the interior, creating the impression of an interior street."

Students: Feng Yiqun and Tang Xinyu Course: The Complete Map of Capital Beijing, ARC 407, B.Arch. '23 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong and Zhang Yuanbo Photographer: Wang Hongyue

Meow Temple by Luo Chenhao and Zheng Zhi

"The 'Meow Temple', also called Maowang Temple, is inspired by Neviges Mariendom, the powerful, brutalist monastery designed by Gottfried Böhm in western Germany.

"Just as Böhm's modernist monastery attempted to express the new spirit of post-war Germany and a more open Catholic Church, The Meow Temple expresses contemporary religious sentiment in China.

"But the Meow Temple takes a more critical, even satirical view of religion and the way it has been commercialised in China. The fortune cat (and the building's name) satirises the corruption of Chinese religious practice."

Students: Luo Chenhao and Zheng Zhi Course: The Complete Map of Capital Beijing, ARC 407, B.Arch. '23 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong, Zhang Yuanbo Photographer: Wang Hongyue

Neighbour Hood Garden by Zhang Yi and Wang Yuxuan

"Neighbour Hood Garden's inspiration is Robin Hood Gardens, designed by Alison and Peter Smithson and built in 1972. Many features of the Smithson project, including an aerial street, are recognisable in the Neighbour Hood Garden project.

"The ambition is to test such features in the context of 21st century Beijing. Vernacular architecture is also referenced, especially in the building profile, which is recognisable when compared with Dinghuixili, a residential building in Beijing."

Students: Zhang Yi and Wang Yuxuan Course: The Complete Map of Capital Beijing, ARC 407, B.Arch. '23 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong and Zhang Yuanbo Photographer: Wang Hongyue

Neo-Forbidden City by Huang Deqiang and Zhong Junyue

"Neo-Forbidden City is a town-scale administrative centre that opens roof paths to the public. The design source is Aldo Rossi's Town Hall of Borgoricco, a masterpiece of post-modern architecture.

"The intention was to design an administrative building that had the authority of civic architecture, but that was also approachable and humble. The design references the Forbidden City and the US White House and other vernacular buildings in Beijing."

Students: Huang Deqiang and Zhong Junyue Course: The Complete Map of Capital Beijing, ARC 407, B.Arch. '23 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong, Zhang Yuanbo Photographer: Wang Hongyue

Pan' Long Stair Club by Zhuang Kaicheng and Feng Wenting

"The Pan' Long Stair Club, an integrated entertainment centre, features a dance hall, a restaurant and karaoke bar. It uses the Konstantin Melnikov's Rusacov Worker's Club, a constructivist icon built in Moscow in 1928, as its source.

"The design also draws on local building typologies and uses local building elements such as intertwined staircases, which can be found in many Beijing 'Urban Villages' and Hutongs.

"Such features make playful reference to the local context, but they also enhance the experience of those who use the entertainment facilities."

Students:  Zhuang Kaicheng and Feng Wenting Course: The Complete Map of Capital Beijing, ARC 407, B.Arch. '23 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong and Zhang Yuanbo Photographer: Wang Hongyue

Ripple Building by Zhu Haihui and Meng Xinqi 

"The Ripple Building is a hotel that references the Pirelli Tire Building designed by Marcel Breuer and completed in New Haven, Connecticut, in 1970.

"The project is an exploration whose colourful, seemingly unstable structure and exaggerated elements offer a dramatic contrast to the regularity and solidity of Breuer’s brutalist masterpiece."

Students: Zhu Haihui and Meng Xinqi Course: The Complete Map of Capital Beijing, ARC 407, B.Arch. '23 Tutors: Li Han and Hu Yan, co-founders of Drawing Architecture Studio (DAS); Zhang Xintong and Zhang Yuanbo Photographer: Wang Hongyue

Partnership content

This school show is a partnership between Dezeen and Syracuse University. Find out more about Dezeen partnership content here.

The post Syracuse University presents eight models based on a Qing dynasty map of Beijing appeared first on Dezeen.

[softestaura]

YVMIN SS23 ‘Paradise’ Campaign by Li Yuanbo

[softestaura]

YVMIN SS23 ‘Paradise’ Campaign by Li Yuanbo

[softestaura]

YVMIN SS23 ‘Paradise’ Campaign by Li Yuanbo

[softestaura]

YVMIN SS23 ‘Paradise’ Campaign by Li Yuanbo

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Gabriela Alves photographed by Yuanbo Li for CFIERCE

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Photographed by Yuanbo Li for CFIERCE

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Monster University by Yuanbo Li for CFIERCE

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YVMIN SS23 ‘Paradise’ Campaign by Li Yuanbo