ACS Applied Optical Materials最新文献

{"title":"Ultralow Concentration in Parts Per Trillion with Nanomolar Level Detection for Monodispersed Upconversion Nanoparticles of Li-Co-doped NaYF4:Ho3+/Yb3+: Potential Materials in Multimodal Applications","authors":"Leishangthem Sanatombi Devi,&nbsp;Manas Srivastava,&nbsp;Ruchi Agrawal,&nbsp;Ramaswamy Sandeep Perala,&nbsp;Rashmi Joshi,&nbsp;Bheeshma Pratap Singh* and Raghumani Singh Ningthoujam*,&nbsp;","doi":"10.1021/acsaom.4c0052010.1021/acsaom.4c00520","DOIUrl":"https://doi.org/10.1021/acsaom.4c00520https://doi.org/10.1021/acsaom.4c00520","url":null,"abstract":"<p >Foreign ion accommodation plays a significant role in altering the behavior of nanomaterials for their crystal structures, morphology, and functionalities. In the present work, the influence of Li⁺ co-doping on crystallinity and the photoluminescence upconversion property of NaYF₄:Ho³⁺/Yb³⁺ has been investigated. The crystallinity gets improved significantly after Li⁺ co-doping into NaYF₄:Ho³⁺/Yb³⁺. An X-ray diffraction study confirmed the formation of β-NaYF₄ nanoparticles. A transmission electron microscopy study confirmed the appearance of monodispersed spherical nanoparticles with an average particle size of 30 nm for the sample without an Li⁺ ion, whereas hexagonal shaped particles with the longest diagonal of 35 nm were observed for the sample with an Li⁺ ion. Under the 980 nm excitation, two prominent upconverting bands at 540 and 650 nm arose due to ⁵S₂/⁵F₄ → ⁵I₈ (green) and ⁵F₅ → ⁵I₈ (red), electronic transitions of Ho³⁺ ions, respectively. Such green and red band emissions can be applied in various applications, such as bioimaging in chicken muscle with 0.5 cm penetration depth and anticounterfeiting. The synthesized upconversion nanoparticles exhibited bright green emission. The detection limit was found in our sample to be 22.6 parts per trillion with molarity (32.1 nM) using integrating sphere technique.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"444–454 444–454"},"PeriodicalIF":0.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507707","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":"Holographic Photopolymer Gratings: A Step toward Wound Temperature Sensing","authors":"Pamela Stoeva,&nbsp;Dervil Cody,&nbsp;Suzanne Martin and Izabela Naydenova*,&nbsp;","doi":"10.1021/acsaom.4c0050410.1021/acsaom.4c00504","DOIUrl":"https://doi.org/10.1021/acsaom.4c00504https://doi.org/10.1021/acsaom.4c00504","url":null,"abstract":"<p >This study presents the development and optimization of acrylamide-based photopolymer volume transmission gratings for wound temperature monitoring, addressing the need for accessible, user-friendly real-time biomedical sensors. Temperature variations in the narrow range of 33–37 °C are clinically significant for wound healing, offering insights into inflammation and infection prior to visual indications. Leveraging the inherent sensitivity of grating diffraction efficiency to Bragg angle detuning, 15° slanted gratings were recorded with an initial diffraction efficiency of 50%. These gratings are designed to provide a selective and reversible response to temperature fluctuations, ensuring compatibility with wound care applications. The photopolymer composition was systematically tailored by varying the ratios of acrylamide (AA) and diacetone acrylamide (DA) monomers, as well as the concentration of the cross-linker, <i>N</i>,<i>N</i>′-methylenebis(acrylamide) (BA). Laminated samples were tested across multiple temperature cycles, demonstrating consistent and repeatable changes in normalized diffracted beam intensity of 72 ± 5% across 10 cycles, revealing a sensitivity of 18%/°C. For the optimized composition, an improved thermal sensitivity, stability, and repeatability, maintaining performance after 20 days of aging was demonstrated. The findings highlight the influence of monomer ratios and cross-linker concentration on thermal responsiveness and material durability. This work underscores the potential of photopolymer gratings as cost-effective, robust, and scalable solutions for wound temperature monitoring, particularly in resource-limited environments. Future studies will focus on integrating these gratings into a flexible wound patch framework for practical clinical applications, further investigating their utility in improving wound care management.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"392–402 392–402"},"PeriodicalIF":0.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsaom.4c00504","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507710","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":"Enhanced Photosensitivity and Surfactant Resistance in Nanopolymersome Membranes as a Function of Gold Nanoparticle Incorporation","authors":"Regina L. Salzer,&nbsp;Ajay N. Shah,&nbsp;Cory J. Trout,&nbsp;Abby R. Robinson,&nbsp;Sujay Ratna,&nbsp;Sean M. O’Malley and Julianne C. Griepenburg*,&nbsp;","doi":"10.1021/acsaom.4c0050310.1021/acsaom.4c00503","DOIUrl":"https://doi.org/10.1021/acsaom.4c00503https://doi.org/10.1021/acsaom.4c00503","url":null,"abstract":"<p >Polymersomes hold great promise as carrier vesicles for the encapsulation and delivery of cargo. Self-assembly of amphiphilic diblock copolymers into spherical vesicles result in two compartments for encapsulation: an aqueous lumen and a bilayer membrane. Herein, it is demonstrated that dodecanethiol-functionalized gold nanoparticles (AuNPs) can be loaded within the hydrophobic region of the bilayer membrane of polybutadiene-<i>b</i>-poly(ethylene oxide) nanopolymersomes as photosensitizers. This is shown to render vesicles responsive to picosecond pulsed irradiation at a wavelength congruent with the localized surface plasmon resonance of the gold nanoparticles. Membrane disruption is demonstrated to scale with laser pulse energy and shows a strong enhancement with nanoparticle incorporation even at the low end of the concentration range. Nanoparticle concentration is also shown to increase polymersome stability in the presence of nonionic surfactants such as polysorbate 20 and ionic surfactants such as sodium dodecyl sulfate. In addition, a comparative analysis is performed between dynamic light scattering and cryo-transmission electron microscopy vesicle size results whereby an inference is made between sample composition and analytical method.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"403–413 403–413"},"PeriodicalIF":0.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507669","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":"n-UV-Converted Enhanced Downshifting Blue Emission through Bi3+ Sensitization in Self-Activated LaNbO4 Phosphors for LEDs and High Broadband Quantum Cutting Efficiency for Solar Cell Applications","authors":"Sumit Modanwal,&nbsp;Abhishek Roy,&nbsp;Anita Rai,&nbsp;Kailash Narayan Uttam,&nbsp;Abhinav Pratap Singh,&nbsp;Satyabrata Jit,&nbsp;Hirdyesh Mishra* and Shyam Bahadur Rai*,&nbsp;","doi":"10.1021/acsaom.4c0046910.1021/acsaom.4c00469","DOIUrl":"https://doi.org/10.1021/acsaom.4c00469https://doi.org/10.1021/acsaom.4c00469","url":null,"abstract":"<p >This paper reports the downshifting (DS) and quantum cutting (QC) emissions in Bi³⁺-sensitized self-activated LaNbO₄ and LaNbO₄/Yb³⁺ phosphor materials. The Bi³⁺ and Yb³⁺ ion-doped/codoped phosphor materials were synthesized at 1473 K by a solid-state reaction method. The structural and optical characterization techniques have been carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), photoluminescence (PL), and lifetime measurements. LaNbO₄ gives intense blue emission in the 350–600 nm region, with the maximum in the violet-blue region at 418 nm on ultraviolet (UV) excitation. The PL emission intensity was found to increase on doping of the Bi³⁺ ion. It is found that at lower concentrations (≤0.08 mol %), Bi³⁺ behaves as a sensitizer; however, at higher concentrations (&gt;0.5 mol %), it acts as an activator by producing its own emission due to ³P₁ → ¹S₀ transition. The behavior of phosphors from low to high concentrations of Bi³⁺ has been investigated in detail by lifetime measurements and a suitable energy level diagram. The self-activated broad blue-emitting behavior of doped LaNbO₄:10Yb³⁺, xBi³⁺ has been used to produce strong QC near-infrared (NIR) emission on UV excitation (262 nm) at 0.08 (i.e., as a sensitizer) and at 2 mol % (as an activator) Bi³⁺ concentrations. The maximum broadband QC efficiency is found to be 148% in the LaNbO₄:0.08 Bi³⁺, 10Yb³⁺ phosphor at optimized Bi³⁺ and Yb³⁺ concentrations. We also investigated the QC emission at two distinct concentrations (0.08 and 2 mol %, i.e., sensitizer and activator, respectively) with varied Yb³⁺ concentrations from 0 to 13 mol % and compared with different other QC emitting phosphors. The LaNbO₄ host and Bi³⁺ ions (³P₁ level) both transfer energy to Yb³⁺ ions in two ways, and the two-step intense broadband quantum cutting would result in intense NIR emission. The NIR emission generated by this type of QC process can be used to enhance the efficiency of solar cells. The LaNbO₄:Bi³⁺ phosphor emits intense DS emission with high color purity (88.8%) in the blue region and therefore has been employed to produce an <i>n</i>-UV-converted strong blue source for light-emitting diode (LED) application.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"319–335 319–335"},"PeriodicalIF":0.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507589","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":"Plasmonic Properties of Doped Metal Oxides Investigated through the Kubelka–Munk Formalism","authors":"Michaël Lobet*,&nbsp;Florian Gillissen,&nbsp;Nicolas De Moor,&nbsp;Jennifer Dewalque,&nbsp;Pierre Colson,&nbsp;Rudi Cloots,&nbsp;Anthony Maho and Luc Henrard,&nbsp;","doi":"10.1021/acsaom.4c0043210.1021/acsaom.4c00432","DOIUrl":"https://doi.org/10.1021/acsaom.4c00432https://doi.org/10.1021/acsaom.4c00432","url":null,"abstract":"<p >Materials with broadband tunable optical properties are looked for in smart windows applications. Doped metal oxides presenting dual-band visible (VIS)–near-infrared (NIR) electrochromic properties can be used for solving such a challenge, and their accurate optical characterization is therefore of prime importance. The Kubelka–Munk model is a state-of-the-art way to optically quantify the absorption properties of materials and is occasionally applied to plasmonic materials, even if great care should be taken to meet the formalism hypotheses. In the present work, Kubelka–Munk theory is discussed in the context of particles of indium–tin oxide and molybdenum–tungsten oxide formulations that are used as single-NIR and both-VIS/NIR active advanced electrochromic materials, respectively. An analytical model is derived for particles of much smaller dimensions than the incident wavelength and is experimentally verified. A dilution method is applied to verify the plasmonic characteristics of the particles. This study is key for the efficient characterization of the optical properties of metal oxides and plasmonic materials in general, from diffuse reflectance measurements.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"296–304 296–304"},"PeriodicalIF":0.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507857","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":"Photorefractive Effects in Ferro- and Flexoelectric Liquid Crystal Blends Containing Photoconductive Chiral Dopants with Lactate and Hydroxybutyrate Structures","authors":"Maho Hirakawa,&nbsp;Atsushi Seki,&nbsp;Khoa Van Le,&nbsp;Yumiko Naka and Takeo Sasaki*,&nbsp;","doi":"10.1021/acsaom.4c0043410.1021/acsaom.4c00434","DOIUrl":"https://doi.org/10.1021/acsaom.4c00434https://doi.org/10.1021/acsaom.4c00434","url":null,"abstract":"<p >Photorefractive liquid crystal blends exhibiting the flexoelectric effect were prepared, and the photorefractive effect, dielectric properties, and optical properties of these materials were investigated. These blends comprised mixtures of smectic liquid crystals with chiral photoconductive compounds and an electron-trap reagent. Depending on the molecular structure of the chiral compound, these mixtures showed either only flexoelectricity or both flexoelectricity and ferroelectricity. The former mixtures exhibited a faster and larger photorefractive effect than the latter ones.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"284–295 284–295"},"PeriodicalIF":0.0,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsaom.4c00434","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507760","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":"Utilizing Near-Field Scanning Optical Microscopy Measurements to Probe Laser Crystallization and Reamorphization in Phase Change Sb2S3 Thin Films","authors":"Adrian Podpirka*,&nbsp;Cameron Gutgsell,&nbsp;Gabriella M. Hunt,&nbsp;Robert C. Bruce,&nbsp;David Shrekenhamer,&nbsp;Blake S. Simpkins and Ronald J. Warzoha,&nbsp;","doi":"10.1021/acsaom.4c0043710.1021/acsaom.4c00437","DOIUrl":"https://doi.org/10.1021/acsaom.4c00437https://doi.org/10.1021/acsaom.4c00437","url":null,"abstract":"<p >Phase change materials (PCMs) are seeing tremendous interest for their use in reconfigurable photonic devices. Understanding the volume of the phase change is critical to the construction of devices. In this work, we demonstrate the ability to crystallize and reamorphize Sb₂S₃ thin films using a 405 nm laser and nondestructively quantify partial volumetric crystallization with nanoscale resolution via near-field scanning optical microscopy (NSOM). We provide an analytical description of the NSOM measurements and correlate the results with a model of laser/Sb₂S₃ interactions that includes laser irradiance power, thermal transport, and phase change kinetics. The results demonstrate a relationship between computational modeling and physical device behavior, which is critical for the creation of phase change-based devices.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"305–312 305–312"},"PeriodicalIF":0.0,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507787","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":"Independent Dual-Mode Humidity and Hydrogen Detection Using a Plasmonic-Photonic Hybrid Metasurface","authors":"Hongsen Zhao,&nbsp;Qiushun Zou*,&nbsp;Ang Xu and Xiang Shen,&nbsp;","doi":"10.1021/acsaom.4c0050610.1021/acsaom.4c00506","DOIUrl":"https://doi.org/10.1021/acsaom.4c00506https://doi.org/10.1021/acsaom.4c00506","url":null,"abstract":"<p >High-sensitivity multitype detections independent of the metadevices are essential in industrial process control, environmental monitoring, biomedical diagnosis, etc. Here, we report a plasmonic-photonic hybrid metasurface (PPHM), consisting of a poly(vinyl alcohol) (PVA) guided-mode resonator sandwiched between a top palladium (Pd) grating array and a bottom gold reflector, achieving dual-mode optical detections independent of humidity and hydrogen simultaneously. The humidity properties in hydrogen gas or air were determined by the guided mode from a dielectric resonator with the PVA gratings and a spacer. The volume expansion in a PVA layer at high humidity gives rise to the redshift of the guided mode for the PPHM. An RH sensitivity of 0.31 nm/RH was achieved with a humidity range of 30–80%. The hydrogen-sensing characteristics of a PPHM result from the phase change of palladium after hydrogen absorption, which then causes reflectivity variations. The relative reflection change of a PPHM was up to 1.12 as palladium gratings were fully hydrogenated. The results suggest that the PPHM is a promising platform for realizing multitype optical detections of humidity and hydrogen sensing.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"414–421 414–421"},"PeriodicalIF":0.0,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507777","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":"Artificial Light-Harvesting System with White Light Emission Based on Al3+ Regulation","authors":"Juan Zhang,&nbsp;Yuehua Liang,&nbsp;Jiuzhi Wei,&nbsp;Caiyuan Guo,&nbsp;Yanyan Li,&nbsp;Tingting Zhang,&nbsp;Enke Feng,&nbsp;Xinxian Ma* and Xinning Han*,&nbsp;","doi":"10.1021/acsaom.4c0048510.1021/acsaom.4c00485","DOIUrl":"https://doi.org/10.1021/acsaom.4c00485https://doi.org/10.1021/acsaom.4c00485","url":null,"abstract":"<p >Luminescence intensity of Schiff-base fluorescent molecule B is enhanced by coordination with Al³⁺. B–Al³⁺ can achieve energy transfer with acridine red by mimicking plant photosynthesis. When the ratio of B–Al³⁺ to acridine-red is 6:1, a strong white emission is observed. The color coordinates of the obtained B–Al³⁺/ acridine red light trapping system are (0.33, 0.29), which is considerably close to the pure white spot (0.33, 0.33) in the CIE chromatogram. Finally, we use poly(vinyl alcohol) as the carrier to prepare a gel writing material for information encryption and protection.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"358–363 358–363"},"PeriodicalIF":0.0,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507634","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":"Host–Guest Cocrystal Enabling Efficient Electrochemiluminescence Based on Thermally Activated Delayed Fluorescence","authors":"Feng Zheng,&nbsp;Mingxin Liu,&nbsp;Yijiang Li*,&nbsp;Jinliu Wei,&nbsp;Xiaoping Chen,&nbsp;Jiancong Ni and Zhixiong Cai*,&nbsp;","doi":"10.1021/acsaom.4c0052710.1021/acsaom.4c00527","DOIUrl":"https://doi.org/10.1021/acsaom.4c00527https://doi.org/10.1021/acsaom.4c00527","url":null,"abstract":"<p >Thermally activated delayed fluorescence (TADF) materials have garnered significant attention for their capacity to augment electrochemiluminescence (ECL). In this work, three kind of host–guest cocrystals were prepared by incorporating dicyanobenzene (DCB) derivatives as acceptor guests within calix[3]acridan (C[3]A) as donor host. Notably, the ECL signals of C[3]A@o-DCB were significantly stronger than those of C[3]A@p-DCB and C[3]A@m-DCB, attributed to enhanced intermolecular charge transfer (ISCT). Mechanistic investigation, supported by DFT calculations, reveals that the physically separated yet spatially proximate D–A configuration promotes efficient ISCT, leading to enhanced ECL. This study provides insights in designing TADF host–guest cocrystals with favorable properties for ECL.</p>","PeriodicalId":29803,"journal":{"name":"ACS Applied Optical Materials","volume":"3 2","pages":"240–247 240–247"},"PeriodicalIF":0.0,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507637","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}