ACS Applied Optical Materials最新文献

{"title":"Sensitivity Enhancement of a Micro Ring Resonator-Based Photonic Sensor by Using a Gelatin Methacryloyl Functional Coating for the Detection of Metoprolol","authors":"Anastasia Tsianaka,&nbsp;Christian Schweikert,&nbsp;Alexander Southan*,&nbsp;Niklas Hoppe,&nbsp;Markus Greul,&nbsp;Mathias Kaschel,&nbsp;Wolfgang Vogel*,&nbsp;Manfred Berroth,&nbsp;Georg Rademacher and Günter E. M. Tovar*,&nbsp;","doi":"10.1021/acsaom.5c00149","DOIUrl":"https://doi.org/10.1021/acsaom.5c00149","url":null,"abstract":"<p >Aquatic environments are often contaminated with biopersistent pharmaceuticals, such as the β-blocker metoprolol. The quantitative determination of such pollutants is crucial for environmental monitoring. Therefore, a highly sensitive integrated photonic biosensor for the detection of minute concentrations of metoprolol is presented here. The sensor is based on a thermally robust ring resonator with a hydrogel coating for metoprolol adsorption. Hydrogels consisting of gelatin methacryloyl enabled an increase in the concentration of metoprolol ions in the vicinity of the photonic chip, resulting in high sensitivity of the sensor setup. Compared to an uncoated chip, an increase in sensitivity of up to a factor of 20 was observed. In combination with software-implemented signal processing, the setup showed a detection limit of less than 1 × 10^–4 μmol mL^–1. The combination of functional coating, thermally insensitive design, and applied digital signal postprocessing makes the system introduced here an attractive approach toward sensor-based wastewater analysis and monitoring.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 7","pages":"1556–1566"},"PeriodicalIF":3.8,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsaom.5c00149","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144806038","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}

{"title":"Influence of Collective Excitonic Effects on the Photophysics of Flexibly- and Rigidly-Bridged Squaraine Dimers Targeted for DNA-Based Applications","authors":"Joohyun Lee,&nbsp;Alexander I. Krivoshey,&nbsp;Olena M. Obukhova,&nbsp;Andrii P. Vashchenko,&nbsp;Katelyn M. Duncan,&nbsp;Matthew S. Barclay,&nbsp;Bernard Yurke,&nbsp;Olga A. Mass,&nbsp;Daniel B. Turner,&nbsp;William B. Knowlton,&nbsp;Ewald A. Terpetschnig*,&nbsp;Anatoliy L. Tatarets*,&nbsp;Jeunghoon Lee* and Ryan D. Pensack*,&nbsp;","doi":"10.1021/acsaom.5c00176","DOIUrl":"https://doi.org/10.1021/acsaom.5c00176","url":null,"abstract":"<p >Squaraines are conjugated organic molecules that exhibit advantageous optical properties in the visible and near-infrared spectral regions; as such, they are featured in a variety of applications. Specifically, squaraines offer improved performance in solar cells, nonlinear optics, bioimaging, organic photodiodes, and emerging applications involving deoxyribonucleic acid (DNA) self-assembly. To improve their optical properties (and ultimately performance) further via collective excitonic effects, we synthesized three squaraine dimers featuring either a rigid or a flexible bridge. We characterized their optical properties and excited-state dynamics in chloroform and methanol via steady-state and time-resolved optical spectroscopies. Compared to the corresponding monomers, we found that both rigidly- and flexibly-bridged squaraine dimers exhibit signatures of collective excitonic effects─that is, red-shifted absorption, band narrowing, small Stokes shift, and superradiance─in both polar and nonpolar solvents. We also found that while rigidly-bridged dimers featured all of these properties, the flexibly-bridged dimers did not feature significant band narrowing and a small Stokes shift. Interestingly, the fluorescence quantum yields and singlet excited-state lifetimes of both monomers and dimers decreased in the polar solvent. As a first step toward the assembly of a functional dimer aggregate network, we covalently tethered the flexibly-bridged dimer and its corresponding monomer to single- and double-stranded DNA and characterized their photophysical properties in an aqueous buffer solution. We observed that the optical properties of the monomer served as a sensitive probe of the local polarity of the environment. In the case of the dimer, we observed a large distribution of conformations via absorption spectroscopy and sampled a subset of the distribution via fluorescence spectroscopy. Our work is an important first step toward implementing molecular aggregates preprogrammed to exhibit desired collective excitonic effects in DNA-assembled networks.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 7","pages":"1592–1606"},"PeriodicalIF":3.8,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fluorescence Switching in pH-Responsive Poly(amidoamine) Hydrogel Networks Containing Gold Nanoparticles and Carbon Nanodots for Potential Real-Time Tumor pH Monitoring","authors":"Roberta Cillari,&nbsp;Alice Sciortino,&nbsp;Sergio Scirè,&nbsp;Marco Cannas,&nbsp;Fabrizio Messina and Nicolò Mauro*,&nbsp;","doi":"10.1021/acsaom.5c00194","DOIUrl":"https://doi.org/10.1021/acsaom.5c00194","url":null,"abstract":"<p >We developed a poly(amidoamine)-based nanocomposite hydrogel incorporating carbon dots (CDs) and gold nanoparticles (AuNPs) to create a 3D fluorescent network responsive to pH variations within the tumor microenvironment (TME; pH 5.5–7.4). The system exploits biocompatible acrylamide end-capped oligomers obtained by polyaddition of <span>l</span>-arginine and methylenebis(acrylamide), which exhibit pH-sensitive conformations that modulate interparticle distances and, consequently, fluorescence intensity. Optimal concentrations of CDs and AuNPs were identified to promote an antenna effect via surface electron interactions, enhancing the fluorescence. The fluorescence quantum yield peaked at pH 6.4 due to network compaction and declined at both lower (5.5) and physiological pH (7.4), with the latter due to stronger CD–AuNP interactions and polymer collapse. This behavior enables the hydrogel to act as a real-time pH sensor suitable for bioimaging applications. The hydrogel produced by this method can be, in principle, readily converted into nanogels with tunable size and morphology, thus offering potential for injectable delivery and broader biomedical use. These findings support the application of <span>l</span>-ARGO7@CDs/AuNPs nanogels for fluorescence-guided tumor detection and pH-responsive monitoring of therapeutic outcomes, opening opportunities for personalized oncological treatments.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 7","pages":"1628–1636"},"PeriodicalIF":3.8,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsaom.5c00194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807623","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}

{"title":"Development of Cosputtered Amorphous Ge–Bi–Se Films for Nonlinear Infrared Photonic Applications","authors":"Anupama Viswanathan,&nbsp;Youssef Ghandaoui,&nbsp;Jan Gutwirth,&nbsp;Tomas Halenkovic,&nbsp;Abdelali Hammouti,&nbsp;Stanislav Slang,&nbsp;Martin Pavlista,&nbsp;Stanislav Pechev,&nbsp;Jean-Pierre Guin,&nbsp;Lucas Deniel,&nbsp;Loic Bodiou,&nbsp;Mehdi Alouini,&nbsp;Joel Charrier,&nbsp;Petr Nemec and Virginie Nazabal*,&nbsp;","doi":"10.1021/acsaom.5c00165","DOIUrl":"https://doi.org/10.1021/acsaom.5c00165","url":null,"abstract":"<p >RF magnetron cosputtered amorphous Ge–Bi–Se films were fabricated using polycrystalline GeSe₂ and Bi₂Se₃ targets. Their structural, linear, and nonlinear optical properties were studied to understand compositional influence for future photonic applications. A broader Ge–Bi–Se amorphous region with a noticeably high bismuth atomic percentage (up to at % Bi = 36%) is observed using this deposition method compared to ≤16 at % in the conventional Ge₂₀Se_{80–<i>x</i>}Bi_<i>x</i> bulk glass synthesis [<contrib-group><span>Ikari, T.</span></contrib-group> <cite><i>Phys. Rev. B</i></cite> <span>1993</span>, <em>47</em>(9), 4984]. The structural characteristics of the cosputtered films were analyzed using Raman spectroscopy, where increasing bismuth concentration shifted all vibrational bands to the lower energy side with reduced intensity. A decrease in optical band gap energy values from 2.04 (±0.02) eV (Bi atom % = 0) to 0.73 (±0.02) eV (Bi atom % = 36) and the corresponding increase in refractive index value n from 2.41 (±0.01) to 4.09 (±0.01) at telecommunication wavelength indicate the strong influence of bismuth on the optical properties of the films. Third-order nonlinear optical parameters were calculated from linear parameters using semiempirical equations and Sheik-Bahae formalism in order to allow their prediction according to the film composition and taking into account the wavelength of use. Following these simulations, which enabled the selection of promising compositions in terms of optical nonlinearity applications, this work also focused on demonstrating the feasibility of manufacturing ridge waveguides from these cosputtered films by RF magnetron using dry etching with the aim of offering Ge–Bi–Se-based integrated optical circuits.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 7","pages":"1567–1579"},"PeriodicalIF":3.8,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144807603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced Microwave Absorption in Woven Structures: The Role of Conductivity-Polarization Loss Synergy","authors":"QiHong Wei,&nbsp;Yuhao Liu,&nbsp;Kaili Zhang,&nbsp;Guanqi Xu,&nbsp;Yuefeng Yan*,&nbsp;Boshi Gao,&nbsp;Ying Sun,&nbsp;Hongli Liu and Xiaoxiao Huang*,&nbsp;","doi":"10.1021/acsaom.5c00122","DOIUrl":"https://doi.org/10.1021/acsaom.5c00122","url":null,"abstract":"<p >Optimizing the synergy between conductivity and polarization losses is essential for enhancing microwave absorption (MA) performance. Herein, an optimal conductivity-polarization loss ratio is identified by integrating the Cole–Cole formula with transmission line principles. The ideal ratio was determined to be within the range of 0.22–0.41. Utilizing this ratio as a guideline, double-layer SiC fiber weaving (DSW) materials underwent algorithmic optimization, leading to significant improvements in polarization loss. To precisely adjust the loss contribution rate, three distinct types of shortcut fibers with varying conductivities were incorporated into a paraffin matrix, facilitating the design of a tailored conductive loss contribution. Experimental results demonstrated that DSW with negligible conductivity loss could not achieve effective absorption. In contrast, the MA performance of chopped carbon fiber/DSW composites improved with adjustments to conductivity, exhibiting an absorption band ranging from 8.2 to 12.4 GHz as the loss contributions approached the optimal ratio. This pioneering investigation into the interactions among various loss mechanisms and MA performance lays the groundwork for the development of high-performance MA materials and provides valuable insights for future research and applications.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 7","pages":"1513–1522"},"PeriodicalIF":3.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144806588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of Eu2+ Blue PL and Eu3+ Red PL Transparent Composites","authors":"Hidetoshi Miyazaki*,&nbsp; and ,&nbsp;Tatsuhiro Matsumae,&nbsp;","doi":"10.1021/acsaom.5c00175","DOIUrl":"https://doi.org/10.1021/acsaom.5c00175","url":null,"abstract":"<p >Eu-based composite films exhibiting PL properties were prepared by using europium nitrate and translucent urethane resin. The fabricated composite showed a red PL property with sharp peaks at 591 nm (⁵D₀ → ⁷F₁) and 615 nm (⁵D₀ → ⁷F²) attributed to Eu³⁺ as the emission center. The Eu³⁺ in the composite was reduced to Eu²⁺ by UV irradiation of the Eu³⁺-based composite. The Eu²⁺-based composite exhibited blue luminescence, with a broad peak centered at 478 nm.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 7","pages":"1613–1617"},"PeriodicalIF":3.8,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144806589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Behrang Salahshournia,&nbsp;Ali Noroozi,&nbsp;Daniel Fortin,&nbsp;Lulzim Shkreta,&nbsp;Benoit Chabot,&nbsp;Armand Soldera,&nbsp;Hubert Cabana* and Pierre D. Harvey*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":0.0,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsaom.5c00068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489120","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}

{"title":"","authors":"Suyu Sheng,&nbsp;Xinyu Guo,&nbsp;Xin Li*,&nbsp;Hang Wang,&nbsp;Minxuan Xu,&nbsp;Yueqin Shi,&nbsp;Binyu Li,&nbsp;Qi Zhang* and Rong Xiang,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":0.0,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsaom.5c00094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489125","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}

{"title":"","authors":"Ramakrishnan AbhijnaKrishna,&nbsp;Shu-Pao Wu and Sivan Velmathi*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":0.0,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsaom.5c00089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489136","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}

{"title":"","authors":"Raziel Itzhak,&nbsp;Nathan Suleymanov,&nbsp;Boris Minkovich,&nbsp;Liana Kartvelishvili,&nbsp;Vladislav Kostianovski,&nbsp;Roman Korobko,&nbsp;Alex Hayat and Ilya Goykhman*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":0.0,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsaom.5c00105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144489142","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}