ACS Nanoscience AuPub Date : 2025-03-19eCollection Date: 2025-04-16DOI: 10.1021/acsnanoscienceau.4c00080
Amis Sharma, Chun-Chia Chen, Jordan McCourt, Mingi Kim, Kenji Watanabe, Takashi Taniguchi, Leonid Rokhinson, Gleb Finkelstein, Ivan Borzenets
{"title":"Fermi Velocity Dependent Critical Current in Ballistic Bilayer Graphene Josephson Junctions.","authors":"Amis Sharma, Chun-Chia Chen, Jordan McCourt, Mingi Kim, Kenji Watanabe, Takashi Taniguchi, Leonid Rokhinson, Gleb Finkelstein, Ivan Borzenets","doi":"10.1021/acsnanoscienceau.4c00080","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.4c00080","url":null,"abstract":"<p><p>We perform transport measurements on proximitized, ballistic, bilayer graphene Josephson junctions (BGJJs) in the intermediate-to-long junction regime (<i>L</i> > ξ). We measure the device's differential resistance as a function of bias current and gate voltage for a range of different temperatures. The extracted critical current <i>I</i> <sub>C</sub> follows an exponential trend with temperature: exp(-<i>k</i> <sub>B</sub> <i>T</i>/<i>δE</i>). Here <i>δE</i> = ℏν <sub><i>F</i></sub> /2<i>πL</i>: an expected trend for intermediate-to-long junctions. From <i>δE</i>, we determine the Fermi velocity of the bilayer graphene, which is found to increase with gate voltage. Simultaneously, we show the carrier density dependence of <i>δE</i>, which is attributed to the quadratic dispersion of bilayer graphene. This is in contrast to single layer graphene Josephson junctions, where <i>δE</i> and the Fermi velocity are independent of the carrier density. The carrier density dependence in BGJJs allows for additional tuning parameters in graphene-based Josephson junction devices.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 2","pages":"65-69"},"PeriodicalIF":4.8,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12006853/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143999377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Nanoscience AuPub Date : 2025-03-12eCollection Date: 2025-04-16DOI: 10.1021/acsnanoscienceau.5c00007
Samira Munkaila, Kevin J Torres, Jennifer Wang, Marcus Weck
{"title":"Dielectrophoretic Assembly of Customized Colloidal Trimers.","authors":"Samira Munkaila, Kevin J Torres, Jennifer Wang, Marcus Weck","doi":"10.1021/acsnanoscienceau.5c00007","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.5c00007","url":null,"abstract":"<p><p>The controlled assembly of colloidal trimers with both shape and surface anisotropy remains a challenge. In this work, polymeric dielectric colloidal trimers selectively functionalized with gold nanoparticles are used to create four distinct particles. The shape and surface anisotropy provided by the metallodielectric particles allows for directive assembly in a dielectrophoretic field. When subjected to varied frequencies and media permittivities, the particles assemble with different packing densities and orientations. On-demand assembly and disassembly of the particles are achieved by switching on or off the applied voltage. These multicomponent colloidal particles and their subsequent assemblies presented here provide a promising platform for engineering complex structures with versatile functionalities.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 2","pages":"100-110"},"PeriodicalIF":4.8,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12006858/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143989279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Nanoscience AuPub Date : 2025-03-12DOI: 10.1021/acsnanoscienceau.5c0000710.1021/acsnanoscienceau.5c00007
Samira Munkaila, Kevin J. Torres, Jennifer Wang and Marcus Weck*,
{"title":"Dielectrophoretic Assembly of Customized Colloidal Trimers","authors":"Samira Munkaila, Kevin J. Torres, Jennifer Wang and Marcus Weck*, ","doi":"10.1021/acsnanoscienceau.5c0000710.1021/acsnanoscienceau.5c00007","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.5c00007https://doi.org/10.1021/acsnanoscienceau.5c00007","url":null,"abstract":"<p >The controlled assembly of colloidal trimers with both shape and surface anisotropy remains a challenge. In this work, polymeric dielectric colloidal trimers selectively functionalized with gold nanoparticles are used to create four distinct particles. The shape and surface anisotropy provided by the metallodielectric particles allows for directive assembly in a dielectrophoretic field. When subjected to varied frequencies and media permittivities, the particles assemble with different packing densities and orientations. On-demand assembly and disassembly of the particles are achieved by switching on or off the applied voltage. These multicomponent colloidal particles and their subsequent assemblies presented here provide a promising platform for engineering complex structures with versatile functionalities.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 2","pages":"100–110 100–110"},"PeriodicalIF":4.8,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsnanoscienceau.5c00007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143832986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Nanoscience AuPub Date : 2025-02-27eCollection Date: 2025-06-18DOI: 10.1021/acsnanoscienceau.4c00048
Filipe M Santos, Tiago A G Duarte, Sandra F H Correia, Rui F P Pereira, Alexandra Conde, Álvaro R Ribeiro, Susana Santos Braga, Sónia P M Ventura, Rute A S Ferreira, Verónica de Zea Bermudez, Sílvia C Nunes
{"title":"Biphosphor Carbon Dots/Chlorophyll System Entirely Derived from <i>Chlorella</i> Microalgae for Luminescent Solar Concentrators.","authors":"Filipe M Santos, Tiago A G Duarte, Sandra F H Correia, Rui F P Pereira, Alexandra Conde, Álvaro R Ribeiro, Susana Santos Braga, Sónia P M Ventura, Rute A S Ferreira, Verónica de Zea Bermudez, Sílvia C Nunes","doi":"10.1021/acsnanoscienceau.4c00048","DOIUrl":"10.1021/acsnanoscienceau.4c00048","url":null,"abstract":"<p><p>In this work, a singular system capable of interacting with the entire visible region of the solar spectrum is produced by combining carbon dots (CDs) and chlorophyll (Chl) pigments, entirely derived from the microalga Chlorella pyrenoidosa. The process involves the digestion of the C. pyrenoidosa cellular wall in an acetic acid:cholinium chloride (AA/ChCl) solvent, followed by a microwave reaction. The resulting CDs exhibit excitation and emission maxima at 461 and 528 nm, respectively. The Chl centers enable a secondary photoluminescence (PL) process, thus ensuring that the as-prepared CDs/Chl system (CDCS) can also interact with the farther red region of the visible spectrum. The luminescence properties of CDCS are concentration-dependent, undergoing a blue shift with dilution. Confocal microscopy provided insights into the protection of Chl pigments throughout the process. Furthermore, the consequences arising from the addition of poly-(ethylene glycol) oligomers (PEG-200) are also analyzed. The results demonstrate that the interaction between CDCS and PEG-200 significantly modifies the PL intensity and emission wavelengths, especially at higher PEG-200 concentrations. This suggests that PEG-200 can act as a modulating agent, stabilizing and even preventing the CDs' fluorescence quenching while also affecting the PL properties of Chl. This work presents interesting possibilities for the development of multifunctional luminescent systems derived from microalgae biomass by addressing how these microorganisms can function not only as precursors in the formation of advanced functional materials but also as an integrated component of these systems. As an added benefit, a luminescent solar concentrator (LSC) was fabricated, revealing photostability, as well as optical and power conversion efficiency values of 11 and 0.2%, respectively, values comparable to state-of-the-art CD-based LSCs.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 3","pages":"137-152"},"PeriodicalIF":4.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12183585/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144486220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Nanoscience AuPub Date : 2025-02-27DOI: 10.1021/acsnanoscienceau.4c0004810.1021/acsnanoscienceau.4c00048
Filipe M. Santos*, Tiago A. G. Duarte, Sandra F. H. Correia, Rui F. P. Pereira, Alexandra Conde, Álvaro R. Ribeiro, Susana Santos Braga, Sónia P. M. Ventura, Rute A. S. Ferreira, Verónica de Zea Bermudez and Sílvia C. Nunes,
{"title":"Biphosphor Carbon Dots/Chlorophyll System Entirely Derived from Chlorella Microalgae for Luminescent Solar Concentrators","authors":"Filipe M. Santos*, Tiago A. G. Duarte, Sandra F. H. Correia, Rui F. P. Pereira, Alexandra Conde, Álvaro R. Ribeiro, Susana Santos Braga, Sónia P. M. Ventura, Rute A. S. Ferreira, Verónica de Zea Bermudez and Sílvia C. Nunes, ","doi":"10.1021/acsnanoscienceau.4c0004810.1021/acsnanoscienceau.4c00048","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.4c00048https://doi.org/10.1021/acsnanoscienceau.4c00048","url":null,"abstract":"<p >In this work, a singular system capable of interacting with the entire visible region of the solar spectrum is produced by combining carbon dots (CDs) and chlorophyll (Chl) pigments, entirely derived from the microalga <i>Chlorella pyrenoidosa</i>. The process involves the digestion of the <i>C. pyrenoidosa</i> cellular wall in an acetic acid:cholinium chloride (AA/ChCl) solvent, followed by a microwave reaction. The resulting CDs exhibit excitation and emission maxima at 461 and 528 nm, respectively. The Chl centers enable a secondary photoluminescence (PL) process, thus ensuring that the as-prepared CDs/Chl system (CDCS) can also interact with the farther red region of the visible spectrum. The luminescence properties of CDCS are concentration-dependent, undergoing a blue shift with dilution. Confocal microscopy provided insights into the protection of Chl pigments throughout the process. Furthermore, the consequences arising from the addition of poly(ethylene glycol) oligomers (PEG-200) are also analyzed. The results demonstrate that the interaction between CDCS and PEG-200 significantly modifies the PL intensity and emission wavelengths, especially at higher PEG-200 concentrations. This suggests that PEG-200 can act as a modulating agent, stabilizing and even preventing the CDs’ fluorescence quenching while also affecting the PL properties of Chl. This work presents interesting possibilities for the development of multifunctional luminescent systems derived from microalgae biomass by addressing how these microorganisms can function not only as precursors in the formation of advanced functional materials but also as an integrated component of these systems. As an added benefit, a luminescent solar concentrator (LSC) was fabricated, revealing photostability, as well as optical and power conversion efficiency values of 11 and 0.2%, respectively, values comparable to state-of-the-art CD-based LSCs.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 3","pages":"137–152 137–152"},"PeriodicalIF":4.8,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsnanoscienceau.4c00048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144305860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Nanoscience AuPub Date : 2025-02-25eCollection Date: 2025-04-16DOI: 10.1021/acsnanoscienceau.5c00014
Paul D Goring, Amelia Newman, Christopher W Jones, Shelley D Minteer
{"title":"Celebrating 5 Years of the ACS Au Journal Family.","authors":"Paul D Goring, Amelia Newman, Christopher W Jones, Shelley D Minteer","doi":"10.1021/acsnanoscienceau.5c00014","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.5c00014","url":null,"abstract":"","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 2","pages":"62-64"},"PeriodicalIF":4.8,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12006852/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144031374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Nanoscience AuPub Date : 2025-02-25DOI: 10.1021/acsnanoscienceau.5c0001410.1021/acsnanoscienceau.5c00014
Paul D. Goring, Amelia Newman, Christopher W. Jones* and Shelley D. Minteer*,
{"title":"Celebrating 5 Years of the ACS Au Journal Family","authors":"Paul D. Goring, Amelia Newman, Christopher W. Jones* and Shelley D. Minteer*, ","doi":"10.1021/acsnanoscienceau.5c0001410.1021/acsnanoscienceau.5c00014","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.5c00014https://doi.org/10.1021/acsnanoscienceau.5c00014","url":null,"abstract":"","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 2","pages":"62–64 62–64"},"PeriodicalIF":4.8,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsnanoscienceau.5c00014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143832835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nathaniel E. Larm*, Christopher D. Stachurski, Paul C. Trulove, Xiaonan Tang, Yun Shen, David P. Durkin and Gary A. Baker*,
{"title":"","authors":"Nathaniel E. Larm*, Christopher D. Stachurski, Paul C. Trulove, Xiaonan Tang, Yun Shen, David P. Durkin and Gary A. Baker*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 1","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":4.8,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsnanoscienceau.4c00069","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144400528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bum Jun Kim, Derick Tseng, David Dang, Jiayun Liang, Vitali Soukhoveev, Andrei Osinsky, Ke Wang, Ho Wai Howard Lee and Zakaria Y. Al Balushi*,
{"title":"","authors":"Bum Jun Kim, Derick Tseng, David Dang, Jiayun Liang, Vitali Soukhoveev, Andrei Osinsky, Ke Wang, Ho Wai Howard Lee and Zakaria Y. Al Balushi*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"5 1","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":4.8,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsnanoscienceau.4c00050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144350671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}