Article
Chemistry, Multidisciplinary
Nikolaos Chazapis, Michalis Stavrou, Georgia Papaparaskeva, Alexander Bunge, Rodica Turcu, Theodora Krasia-Christoforou, Stelios Couris
Summary: This study focuses on the synthesis and characterization of iridium (Ir)-based nanohybrids with different chemical compositions. The nanohybrids, including PVP-IrO2, PVP-Ir/IrO2, and non-coated Ir/IrO2 nanoparticles, were synthesized using various methods and characterized through XPS and STEM. The results demonstrate that these nanohybrids exhibit exceptional nonlinear optical (NLO) response and optical limiting (OL) efficiency, making them potential competitors in photonic and optoelectronic applications. Moreover, the choice of synthetic method significantly influences the NLO properties of the nanohybrids, suggesting the possibility of tailor-made NLO properties for specific applications in photonics and optoelectronics.
Article
Chemistry, Physical
Nikhil Puthiya Purayil, Chandrasekharan Keloth
Summary: In this study, the linear and nonlinear optical behavior of cobalt phthalocyanine (CoPc) in the combined local fields of plasmonic and photonic cavity modes were investigated. A planar microcavity was created using polymeric layers and embedded with CoPc/Au nanocomposites. The strong field strengths caused by the cavity photon-plasmon coupling significantly enhanced the nonlinear optical absorption of CoPc. The proposed system can act as an angle-tunable nonlinear optical switch with potential applications in photonics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Physics, Multidisciplinary
Kobi Frischwasser, Kobi Cohen, Shai Tsesses, Shimon Dolev, Gilad Rosenblatt, Guy Bartal
Summary: This study reveals the nonlinear forced response of modal-nonmodal pairs of short-range surface plasmons in thin metal films using a nonradiating nonlinear source. Nonlinearly mediated direct access to nonmodal plasmons in a lossless regime is achieved. The findings can be applied to other forms of surface waves or optical nonlinearities for on-chip nonlinearly controlled nanophotonic devices.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Aivar Abrashuly, Constantinos Valagiannopoulos
Summary: Photonic memory devices can provide different outputs based on the input's past values, exhibiting multistability; nonlinear cylindrical metasurfaces can develop multiple responses based on the history of excitation intensities, offering a promising route for designing versatile optical devices.
Article
Chemistry, Inorganic & Nuclear
Abeer S. Altowyan, Gangareddy Jagannath, K. Keshavamurthy, M. I. Sayyed
Summary: We optimized the concentration of alkali (sodium) oxide in the glass matrix and studied the characteristics of gold nanoparticles embedded in zinc borate-based glass hosts for nonlinear optical properties. We found that glasses containing 30 mol% sodium oxide had the maximum third-order nonlinear optical features. By thermal treating the gold nanoparticles with the optimized glass host at different dwell times near the glass transition temperature, we were able to tune the nonlinear optical characteristics. The results showed that increasing the alkali content in the glass composition led to improved nonlinear optical absorption, refraction, and third-order nonlinear optical susceptibility due to increased formation of gold nanoparticles.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Diogo F. Carvalho, Manuel A. Martins, Paulo A. Fernandes, M. Rosario P. Correia
Summary: Understanding the plasmonic coupling between metallic nanoparticles (NPs) in a 2D array and the effect of a semiconductor substrate is crucial for optimizing optoelectronic structures. This study presents a simple semi-analytical approach based on the discrete dipole approximation (DDA) to simulate the far-field and near-field properties of NP arrays, taking into account particle coupling and the presence of a semiconductor substrate. The method is validated for Ag NP dimers and single Ag NPs on a GaN substrate, and then applied to square and random arrays of Ag NPs. It is found that increasing the NP surface density on a GaN substrate results in a redshift of the dipolar resonance frequency and enhanced near-field properties. The single dipole approach used in this model allows for efficient computational times, making it advantageous for predicting optical properties in large NP arrays on semiconductor substrates for various applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Analytical
Sharon George, Shajesh Palantavida
Summary: Nanoparticle mediated photo-induced hyperthermia shows great potential as a therapeutic solution for diseases such as cancer. In this study, a core-shell nanoparticle construct containing a plasmonic core and a silica shell encapsulating a FRET pair of organic dyes was developed for temperature sensing during thermal induction. Results show that the fluorescent shell provides a linear ratiometric fluorescence response to temperature and efficient energy transfer. By using these nanoparticles, ratiometric temperature measurement can be achieved during photo-induced hyperthermia, suggesting the application of plasmonic nanoparticles in self-limiting photothermal therapy.
Article
Chemistry, Multidisciplinary
Bekir Asilcan Unlu, Serife Akkoyun, Ahmet Karatay, Aytunc Ates, Ayhan Elmali
Summary: This study investigated the effect of aluminum (Al) concentration on the surface plasmon resonance (SPR) band position of aluminum/polyvinylpyrrolidone (Al/PVP) composite nanofibers and found that increasing Al content can enhance nonlinear absorption (NLA) effects. Experimental and theoretical analysis showed that the first model provided more accurate results. It was observed that the NLA performance of Al/PVP nanofibers significantly improved with increasing Al content, accompanied by aggregation effects and broadening and red shifting of the SPR band, indicating a decreasing interparticle distance in Al particles.
Article
Chemistry, Multidisciplinary
Yuan Li, Chan Zheng, San-Tai Wang, Ya-Jie Liu, Wei-Hui Fang, Jian Zhang
Summary: In this study, the effects of functional ligand and ring size regulation on the structures and third-order nonlinear optical properties of crystalline cluster materials were demonstrated. The results showed that the third-order NLO performances are not only determined by general conjugate interactions, but also related to hydrogen bonding, polarizability, and ring sizes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
R. Fathima, A. Mujeeb
Summary: The study reports laser-induced synthesis of gold, silver, and gold-silver alloy nanoparticles in water and their nonlinear optical properties. The ability to fine-tune the nonlinear optical characteristics of nanoparticles by controlling the volume ratios of gold and silver in the alloy nanoparticles makes them promising candidates for optical limiting and opto-thermal applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ines Abid, Wafa Safar, Mathieu Edely, Nordin Felidj, Marc Lamy de la Chapelle, Hong Shen
Summary: In this article, the influence of symmetry breaking in nanocylinder gratings on plasmonic properties and surface enhanced Raman scattering (SERS) performances is studied. By changing the grating period and reducing the symmetry, a redshift and narrowing of plasmon resonance are observed, and the coupling between plasmons and diffraction order is found to occur regardless of polarization direction. It is also demonstrated that grating with reduced symmetry has higher SERS efficiency due to decreased width and increased quality factor of surface plasmon resonance.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Optics
Yang Huang, Lei Gao, Pujuan Ma, Xinchen Jiang, Wenping Fan, Alexander S. Shalin
Summary: In this study, we theoretically investigate the nonlinear chaotic dynamics of a plasmonic core-shell nanoparticle dimer consisting of a nonlocal plasmonic core and a Kerr-type nonlinear shell at the nanometer scale. The results demonstrate that considering nonlocality is crucial in the design of ultra-small-sized nonlinear functional photonic nanoelements. Core-shell nanoparticles provide the freedom to adjust their plasmonic property, allowing for tuning the chaotic dynamic regime in the geometric parameter space. This kind of nanoscale nonlinear system could be a candidate for a tunable nonlinear nanophotonic device.
Article
Chemistry, Multidisciplinary
Mei Song, Lianming Tong, Shengli Liu, Yaowen Zhang, Junyu Dong, Yinglu Ji, Yao Guo, Xiaochun Wu, Xiangdong Zhang, Rong-Yao Wang
Summary: This study investigates the nonlinear amplification effect in molecular chirality transfer, demonstrating recognizable nonlinear behavior in electronic and plasmonic circular dichroism activities. The majority-rules principle is validated in both the molecularly chiral environment and assembled plasmonic nanoparticles, revealing novel twin majority-rules effects from the self-assembled organic-inorganic nanocomposite system. By establishing a direct correlation between dynamic molecular chiral environment template and nonlinear chiral amplification in nanoparticle assemblies, this study provides insight into hierarchical and cooperative chiral information transfer from molecular levels to nanoscales.
Article
Chemistry, Multidisciplinary
Anton Yu. Bykov, Yuanyang Xie, Alexey V. Krasavin, Anatoly V. Zayats
Summary: In this study, the optically driven acoustic modes and nonlinear response of multilayered spherical plasmonic hetero-nanoparticles were investigated. These nanoparticles, composed of alternating layers of gold and silica, exhibited a broadband nonlinear optical response from visible to near-infrared wavelengths. Additionally, they served as a tunable optomechanical system with mechanically decoupled layers, allowing for selective switching of different acoustic modes by tuning the excitation wavelength. These findings not only enhance our understanding of the internal structure of composite plasmonic nanoparticles but also provide an additional degree of freedom for controlling their nonlinear optical and mechanical properties.
Article
Engineering, Electrical & Electronic
Weidong Zhang, Hung Chiang, Te Wen, Lulu Ye, Hai Lin, Haitan Xu, Qihuang Gong, Guowei Lu
Summary: Coupled plasmonic systems are of interest for their optical properties and potential applications. An improved method for mapping geometric configurations to optical properties accurately is developed, allowing for the realization of low-loss cavity and interesting effects in metallic nanoparticles. Asymmetric coupling is predicted to lead to chirality and directional energy transfer in hybrid plasmonic systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Jiaxi Xu, Jiayi Wang, Osman M. Bakr, Nikos Hadjichristidis
Summary: We synthesized aggregation-induced emission (AIE) polymers with unchanged emission wavelength/color through ring-opening (co)polymerizations. The chemical structures/physical properties of the (co)polymers were characterized by NMR, SEC, MALDI-TOF, and DSC. The co-polyether microstructures were studied by calculating reactivity ratios and visualized by Monte Carlo simulation. The fluorescence performance was systematically correlated with molecular weights, crystallinity, monomer compositions, glass transition temperatures, side lengths, and flexibility/rigidity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Khulud Almasabi, Xiaopeng Zheng, Bekir Turedi, Abdullah Y. Alsalloum, Muhammad Naufal Lintangpradipto, Jun Yin, Luis Gutierrez-Arzaluz, Konstantinos Kotsovos, Aqil Jamal, Issam Gereige, Omar F. Mohammed, Osman M. Bakr
Summary: The difficulty of growing perovskite single crystals suitable for efficient photovoltaic devices has been a challenge. Here, we report the growth of mixed-cation FA0.6MA0.4PbI3 perovskite single crystals on a hydrophilic self-assembled monolayer. The single crystals exhibit enhanced stability and power conversion efficiencies up to 23.1%, setting a new benchmark for perovskite solar cells.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Saidkhodzha Nematulloev, Arunachalam Sagadevan, Badriah Alamer, Aleksander Shkurenko, Renwu Huang, Jun Yin, Chunwei Dong, Peng Yuan, Khursand E. Yorov, Azimet A. Karluk, Wasim J. Mir, Bashir E. Hasanov, Mohamed Nejib Hedhili, Naveen M. Halappa, Mohamed Eddaoudi, Omar F. Mohammed, Magnus Rueping, Osman M. Bakr
Summary: This study reports the synthesis of atomically precise copper hydride nanoclusters with a controlled defect, which were demonstrated to be highly selective catalysts for C-C cross-couplings. The work highlights the potential of defective nanoclusters as model systems for investigating individual defects, correlating defects with physicochemical properties, and rationally designing new nanoparticle catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yan-Jun Yu, Chen Zou, Wan-Shan Shen, Xiaopeng Zheng, Qi-Sheng Tian, You-Jun Yu, Chun-Hao Chen, Baodan Zhao, Zhao-Kui Wang, Dawei Di, Osman M. Bakr, Liang-Sheng Liao
Summary: In this study, we successfully developed a highly efficient near-infrared light-emitting diode (LED) by doping ytterbium ions into perovskite nanocrystals (Yb3+ : PeNCs). This resulted in extended emission wavelengths up to 1000 nm through direct sensitization of Yb3+ ions by the PeNC host. By optimizing halide composition and surface passivation, we achieved a peak external quantum efficiency of 7.7% at a central wavelength of 990 nm, making it the most efficient perovskite-based LED with emission wavelengths beyond 850 nm.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Ren-Wu Huang, Xin Song, Shulin Chen, Jun Yin, Partha Maity, Jiayi Wang, Bingyao Shao, Hongwei Zhu, Chunwei Dong, Peng Yuan, Taimoor Ahmad, Omar F. F. Mohammed, Osman M. M. Bakr
Summary: Zero-dimensional (0D) scintillation materials are of great interest for the fabrication of flexible high-energy radiation scintillation screens. Challenges still persist in the development of 0D scintillators, but a strategy based on metal nanoclusters shows promise in overcoming these limitations. This work demonstrates the synthesis and self-assembly of atomically precise nanoclusters with high phosphorescence quantum yield, AIEE behavior, and intense radioluminescence. The self-assembled nanoclusters can be used as building blocks for flexible particle-deposited scintillation films with high-resolution X-ray imaging performance.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Shulin Chen, Jiayi Wang, Simil Thomas, Wasim J. J. Mir, Bingyao Shao, Jianxun Lu, Qingxiao Wang, Peng Gao, Omar F. F. Mohammed, Yu Han, Osman M. M. Bakr
Summary: Inorganic halide perovskite nanocrystals (NCs) are extensively studied as next-generation optoelectronic materials. The atomic structure at the surface of CsPbBr3 NCs is directly observed, revealing a Cs-Br terminated surface with a significantly decreased Cs-Cs bond length, inducing compressive strain and polarization. Density functional theory calculations suggest that this reconstructed surface contributes to the separation of holes and electrons. These findings enhance our understanding of the surface structure and provide insights for designing stable and efficient optoelectronic devices.
Article
Optics
Kostiantyn Sakhatskyi, Bekir Turedi, Gebhard J. Matt, Erfu Wu, Anastasiia Sakhatska, Vitalii Bartosh, Muhammad Naufal Lintangpradipto, Rounak Naphade, Ivan Shorubalko, Omar F. Mohammed, Sergii Yakunin, Osman M. Bakr, Maksym V. Kovalenko
Summary: We demonstrate single-photon counting and long-term stability of perovskite X-ray detectors in the photovoltaic mode, using thick and uniform methylammonium lead iodide single-crystal films (up to 300 μm) and solution directly grown on hole-transporting electrodes. These findings pave the path for the implementation of hybrid perovskites in low-cost, low-dose commercial detector arrays for X-ray imaging with single-photon sensitivity.
Article
Optics
Sultan Alshaibani, Omar Alkhazragi, Islam Ashry, Chun Hong Kang, Mohammed Sait, Tien Khee Ng, Osman M. Bakr, Boon S. Ooi
Summary: All-inorganic CsPbBr3 nanocrystals are used to extend the field-of-view (FOV) of optical concentrators to 60 degrees, reducing the requirements of pointing, acquisition, and tracking (PAT) in optical wireless communication links. The CsPbBr3 nanocrystals convert transmitted UV light into green light that matches the peak absorption of Si-based detectors, allowing stable communication over the wide FOV.
Article
Chemistry, Multidisciplinary
Weina Liu, Yong Zhu, Francesco Stellacci
Summary: Researchers demonstrated a recyclable PCR kit to reduce dependence on nucleic acid resources and address the shortage of PCR kits during the pandemic.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Suiyang Liao, Lixia Wei, Arthur Eliot Bouchez, Francesco Stellacci
Summary: Most studied parameters of nanoparticles' interactions with cells are currently static, while proteins have dynamic structures. This study focuses on single-chain polymeric nanoparticles (SCPNs) that undergo dynamic changes. By creating multiple sets of particles with identical polymer chains, it was found that cell uptake discriminates between dynamic and static SCPN isomers. Dynamic isomers are uptaken more through different endocytic pathways, while static isomers access the cytosol more efficiently.
Article
Pharmacology & Pharmacy
Yong Zhu, Andrey A. A. Sysoev, Paulo H. Jacob Silva, Marine Batista, Francesco Stellacci
Summary: We have reported that CD-6'SLN irreversibly deactivates virions and improves mice survival in H1N1 infection model. CD-6'SLN interacts with the viral envelope protein HA, but not with NA, inhibiting influenza virus through an extracellular mechanism. Our findings suggest that combining viral protein-specific epitopes with hydrophobic linkers provides a strategy for developing antiviral drugs.
Article
Chemistry, Physical
Vishal Yeddu, Parinaz Moazzezi, Bekir Turedi, Muhammad Naufal Lintangpradipto, Dongyang Zhang, Soumya Kundu, Deepak Thrithamarassery Gangadharan, Reuven Gordon, Osman M. Bakr, Makhsud I. Saidaminov
Summary: Single-crystal perovskite solar cells exhibit spontaneous efficiency enhancement due to the slow release of trapped solvent in the perovskite thin films. Heat treatment of the films at 40 degrees C can accelerate solvent release and further improve the performance of the solar cells. This study provides a theoretical basis for advancing single-crystal perovskite solar cells.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jian-Xin Wang, Yue Wang, Maram Almalki, Jun Yin, Osama Shekhah, Jiangtao Jia, Luis Gutierrez-Arzaluz, Youdong Cheng, Omar Alkhazragi, Vijay K. Maka, Tien Khee Ng, Osman M. Bakr, Boon S. Ooi, Mohamed Eddaoudi, Omar F. Mohammed
Summary: Metal-organic frameworks (MOFs) are excellent platforms for high-speed and multichannel data transmission in optical wireless communications (OWCs) due to their tunable optical behaviors. In this study, a novel approach using a combination of organic linkers and metal clusters in MOFs was demonstrated to achieve a tunable wide modulation bandwidth and high net data rate. The engineered MOFs showed outstanding performance in color conversion and color-pure wavelength-division multiplexing (WDM), significantly improving the data transmission capacity and security.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Nanoscience & Nanotechnology
Hongwei Zhu, Sam Teale, Muhammad Naufal Lintangpradipto, Suhas Mahesh, Bin Chen, Michael D. McGehee, Edward H. Sargent, Osman M. Bakr
Summary: This review summarizes the progress made in the stability research of single-junction, lead-based perovskite photovoltaics and discusses the origins of chemical lability and its effects on stability under various stressors. It highlights several prominent strategies for enhancing stability, including compositional tuning, barrier layers, and the fabrication of stable transport layers. The challenges that remain and the perspective on achieving >25-year stable perovskite solar cells are also discussed.
NATURE REVIEWS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yang Zhou, Tengyue He, Peng Yuan, Jun Yin, Shulin Chen, Luis Gutierrez-Arzaluz, Lijie Wang, Osman M. Bakr, Omar F. Mohammed
Summary: Copper halide clusters have garnered attention in light-emitting diodes and optical sensors due to their unique physicochemical properties and diverse chemical structures. Recently, they have also been explored as promising scintillation materials because of their large absorption cross section for X-ray radiation. However, research on copper halide cluster scintillators is still in its early stages and their performance lags behind that of perovskite and its related metal halide structures.
ACS MATERIALS LETTERS
(2023)
