Article
Nanoscience & Nanotechnology
Qysar Maqbool, Arum Jung, Sojeong Won, Jinhan Cho, Jeong Gon Son, Bongjun Yeom
Summary: Research on the chiral magneto-optical properties of inorganic nanomaterials has shown enhanced activity in the visible range when using supra-assembled Fe3O4 magnetite nanoparticles at weak magnetic fields of 1.5 mT. The differences in magnetic circular dichroism responses are attributed to crystallinity, lattice distortion near grain boundaries, and dipolar interactions in the supra-assembled structures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Deepak K. Swain, Gyanadeep Mallik, Pooja Srivastava, Anoop K. Kushwaha, Parasmani Rajput, Shambhu N. Jha, Seokmin Lim, Seungchul Kim, Satchidananda Rath
Summary: The study successfully achieved chirality-driven magnetism through the doping of single manganese (Mn) atom and assembly of gold cluster (Au-8), demonstrating the modulation of chirality in the presence of Mn. The results showed a distinct ferromagnetic hysteresis loop at 300 K, indicating the importance of Mn-driven chirality sensitive ferromagnetism for opto-spintronics applications.
Article
Polymer Science
Jieling Li, Yan Xue, Anhe Wang, Shaonan Tian, Qi Li, Shuo Bai
Summary: In this study, conductive hydrogel was successfully fabricated by introducing a conductive polymer into peptide self-assembled hydrogel. The conductive hydrogel exhibited enhanced conductivity, mechanical property and stability compared to pure peptide-formed hydrogel. In addition, it showed good injectability and 3D bio-printability, and could support the viability of encapsulated cells sensitive to electrical signals.
Article
Chemistry, Physical
Jiahao Pan, Xiaoyao Wang, Jinjin Zhang, Qin Zhang, Qiangbin Wang, Chao Zhou
Summary: Significant chiroptical responses can be achieved by chiral coupling of achiral plasmonic nanoparticles or from intrinsic chirality of plasmonic nanoparticles. This study demonstrates the creation of dimeric plasmonic metamolecules with both chiral coupling and intrinsic chiroptical responses. These metamolecules provide more versatility in tailoring chiroptical responses and designing plasmonic nanodevices with custom plasmonic circular dichroism (PCD).
Article
Chemistry, Physical
Jiahao Pan, Xiaoyao Wang, Jinjin Zhang, Qin Zhang, Qiangbin Wang, Chao Zhou
Summary: By assembling helical plasmonic nanorods with intrinsic chirality, we have created plasmonic metamolecules with both chiral coupling and intrinsic chiroptical responses. These metamolecules offer more dimensions for tailoring chiroptical responses and make it more flexible to design plasmonic nanodevices with custom PCD.
Review
Chemistry, Multidisciplinary
Yawen Yao, Xintong Meng, Cheng Li, Katrien V. Bernaerts, Kai Zhang
Summary: Carbohydrates are considered as an ideal candidate for chirality study due to their unique chemical structures, abundance, and sustainability. Efforts have been made to design and synthesize diverse carbohydrate derivatives and self-assemble them into various supermolecular morphologies. However, there is still insufficient understanding of how carbohydrate structures and self-assembly approaches affect the final morphologies and properties for future demands.
Article
Chemistry, Multidisciplinary
Yoo Jin Lee, Mustafa K. Abdelrahman, Manivannan Sivaperuman Kalairaj, Taylor H. Ware
Summary: Materials that can undergo reversible changes typically require top-down processing for microstructure programming, making it difficult to program microscale 3D shape-morphing materials that deform in non-uniaxial ways. However, a new bottom-up approach is described here, using liquid crystal monomers with controlled chirality to create bending microactuators. By adjusting the concentration of chiral dopants, the bending behavior of these microactuators can be controlled. The asymmetric molecular alignment within the 3D structure confirms the effectiveness of this fabrication method.
Article
Chemistry, Multidisciplinary
Fenghua Zhang, Zongze Zhang, Rongjuan Liu, Jingjing Wei, Zhijie Yang
Summary: It is shown that aqueous dispersions of negatively charged inorganic nanoparticles can induce the chiral assembly of organic radical cations at the liquid-liquid interface, resulting in stable droplets covered by inorganic/organic chiral nanocomposites. Transfer of chirality from chiral organic monomers to the nanoparticle assemblies is observed. Surprisingly, opposite handedness between molecular assemblies and nanoparticle assemblies is determined. Moreover, the functionalities of these chiral droplets can be further engineered through mixing or merging, enabling the production of fluorescent emissive-tunable, magnetic, as well as magnetofluorescent dual-functional droplets.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Lijing Chen, Changlong Hao, Jiarong Cai, Chen Chen, Wei Ma, Chuanlai Xu, Liguang Xu, Hua Kuang
Summary: Chiroptical nanomaterials, such as CdSe/CdS chiral films, have been assembled using the Langmuir-Schaeffer technique to achieve high CPL signals. The symmetrical chiral films with ten layers and a 45-degree inter-angle exhibited the highest CD activity and strong CPL signals. The birefringence and dichroism of the well-aligned CdSe/CdS nanorod layers contributed to the remarkable optical activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Qi Zhang, Kepeng Song, Aiyou Hao, Pengyao Xing
Summary: In this study, a postmodification protocol was developed to attach a chiral cholesteryl pendant to metal-organic polyhedra (MOPs) through covalent conjugation, enabling the self-assembly of chiral superlattices. The postmodification process preserved the coordination cores and allowed for reaction-induced self-assembly in loosely packed nanosized columns. Solvent-processed bottom-up self-assembly in aqueous media resulted in twisted superlattices with a 5 nm lattice parameter. The intercholesteryl forces were found to play a crucial role in the rotation of nanosized MOPs and the transfer of chirality to the supramolecular scale. This work presents a novel approach to the rational design of chiroptical materials based on MOPs for potential applications in enantioselective adsorption, catalysis, and separation.
Article
Chemistry, Multidisciplinary
Simona Bettini, Michela Ottolini, Donato Valli, Rosanna Pagano, Chiara Ingrosso, Maarten Roeffaers, Johan Hofkens, Ludovico Valli, Gabriele Giancane
Summary: Inorganic chiral nanoparticles, particularly gold chiral nanostructures, are receiving increasing attention for their unique optical properties and potential biological applications. This study successfully synthesized gold nanostructures with opposite circular dichroism signals depending on the amino acid enantiomer used during synthesis. The gold nanostructures were further decorated with penicillamine, and it was shown that both penicillamine enantiomers can be successfully bonded with both the enantiomers of the gold nanostructures without affecting their chirality. This research provides important insights into the control of chirality and surface properties in chiral nano-systems.
Article
Chemistry, Multidisciplinary
Muhetaerjiang Mamuti, Rui Zheng, Hong-Wei An, Hao Wang
Summary: The emergence of nanomedicine has significantly improved the pharmacokinetics of conventional therapeutic agents. However, biological barriers and changes in stability and surface properties during transportation hinder its clinical translation. Therefore, a strategy of in vivo self-assembly has been proposed to overcome these challenges and enhance targeted accumulation towards disease sites.
Article
Multidisciplinary Sciences
Mahdi Ghamsari, Tayyebeh Madrakian, Abbas Afkhami, Mazaher Ahmadi
Summary: A series of flexible self-assembled fibers with remarkable optical properties were synthesized through the oxidation-reduction method using nanoporous graphene oxide nanosheets, known as NOG fibers. These fibers exhibited high chemical stability in acidic, basic, and oxidizing media, making them a promising candidate for graphene-based photoluminescent textiles and various optical applications.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Analytical
Xiaohui Niu, Simeng Yan, Rui Zhao, Sha Han, Kunjie Cao, Hongxia Li, Kunjie Wang
Summary: Chirality is important in natural and life sciences, and chiral materials are widely used for electrochemical chiral recognition. Carbon quantum dots have shown potential as a novel carbon nanomaterial due to their unique properties. Self-assembly of achiral porphyrins induced by chiral carbon quantum dots was demonstrated, and the resulting structure showed good electrochemical chiral recognition properties. This research provides a new approach for synthesizing chiral composites and expanding the applications of electrochemical chiral recognition.
Article
Chemistry, Multidisciplinary
Pengyu Liu, Yan Zhang, Ying Guan, Yongjun Zhang
Summary: Hydrogels with ultra-low solid content but good mechanical properties are successfully synthesized using high monomer concentrations and low cross-linker/monomer ratios. The introduction of peptide chains through a poly(l-lysine)-based cross-linker contributes to the gel's excellent mechanical properties, including high stretchability, high tensile strength, superb resilience, high fracture toughness, excellent fatigue resistance, low friction, and high wear resistance. These properties, attributed to the highly entangled structure and a novel energy dissipation mechanism, allow the peptide-crosslinked gel to perform comparably to or better than traditional hydrogels with higher solid content.
ADVANCED MATERIALS
(2023)
Article
Geosciences, Multidisciplinary
Guangwen Wang, Zhanwu Lu, Wenhui Li, Shuai Xue, Haiyan Wang, Yongzhi Cheng, Si Chen, Wei Cai
Summary: Surface waves, often considered as noise in deep reflection data processing, carry valuable underground media information. This paper focuses on the reasonable extraction and use of surface wave signals to study shallow characteristics. By extracting the surface wave fundamental-mode dispersion curve and inversion, the S-wave velocity structure of the study area was obtained. Combined with regional geological and magnetotelluric data, the thickness of the sediment layer and high-velocity anomalies under the Cuonadong dome were analyzed, providing a geophysical basis for establishing the dome structure model and searching for hidden ore bodies.
EARTH PLANETS AND SPACE
(2022)
Article
Chemistry, Physical
Yao Xiong, Fu Chen, Yongzhi Cheng, Hui Luo
Summary: A transparent multilayer metamaterial absorber (MMA) with broadband microwave absorption characteristics based on Indium Tin Oxide (ITO) and polymethyl methacrylate (PMMA) has been designed and fabricated. By adjusting the resistance of ITO and the structural parameters, the microwave absorption properties can be controlled and achieve more than 90% absorption in the frequency range of 2.64-18 GHz. The microwave attenuation mechanism, angle-sensitive properties, and visible light transmittance were investigated, and the experimental and simulated results are consistent, indicating the potential application of this absorber in transparent microwave absorption.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Yongzhi Cheng, Yingjie Qian, Hui Luo, Fu Chen, Zhengze Cheng
Summary: In this paper, a narrowband perfect metasurface absorber (MSA) based on a micro-ring-shaped GaAs array was proposed and theoretically investigated in the terahertz (THz) region for enhanced refractive index (RI) sensing. Simulation results showed that the proposed perfect MSA achieved an absorbance of 99.9% at 2.213 THz with a Q-factor of approximately 460.08, which was efficiently confirmed by the coupling mode theory (CMT). The perfect absorption of the designed structure was primarily contributed by the guided mode of critical resonance coupling. The absorption properties of the proposed structure could be adjusted by changing the geometrical parameters of the GaAs structure. The proposed MSA, due to its higher Q-factor, can enhance RI sensing applications with a sensitivity of about 1.45 THz/RIU. This research provides a new approach for constructing highly efficient MSAs with potential applications in sensing, detecting, and imaging in the THz region.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Zimu Zhang, Yongzhi Cheng, Hui Luo, Fu Chen
Summary: This paper proposes a wideband circular polarization metasurface antenna, consisting of a centrosymmetric structure with a mode suppressor and an asymmetric aperture-coupled feed structure separated by dielectric substrates. Two orthogonal modes with a 90 degrees phase difference are excited by an L-shaped slot and a microstrip line in the aperture-coupled feed structure to achieve CP radiation. Two methods are proposed to expand the CP bandwidth: directly suppressing the characteristic mode and indirectly suppressing it using a mode suppressor. The fabricated antenna shows a low profile of ?(0) x ?(0) x 0.075 ?(0) at 5 GHz, with a 3 dB axial ratio bandwidth of 45.2% (4.1-6.5 GHz), an impedance bandwidth of 41.8% (4.1-6.31 GHz), and a peak gain of 7.94 dBic at 5.9 GHz.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Optics
Jingcheng Zhao, Nan Li, Yongzhi Cheng
Summary: In this paper, an all-dielectric InSb metasurface is proposed for thermal tunable reflective linear-polarization conversion in the terahertz regime. The unit-cell consists of a single anisotropic InSb micro-cuboid structure adhered to a continuous InSb film, with its electric property actively tunable by changing temperature. The InSb metasurface achieves a high cross-polarization reflection coefficient over 90% and an average polarization conversion ratio over 95% from 1.21 THz to 1.92 THz with a relative bandwidth of 45.4%. The designed metasurface can convert the LP wave into its orthogonal component after reflection over a wide range of frequencies at a given external temperature. The simple geometry and superior performance make it suitable for applications in sensors, reflector antennas, and radiometers in the THz regime.
OPTICS COMMUNICATIONS
(2023)
Article
Physics, Condensed Matter
Nan Li, Jingcheng Zhao, Peiyi Tang, Yongzhi Cheng
Summary: In this paper, a novel and simple design of an all-metal 3D anisotropic metamaterial (3DAMM) is proposed and numerically investigated. The design achieves a high-efficient and wide-angle ultrabroadband reflective linear-linear and dual-band linear-circular polarization conversion in the terahertz (THz) region. The design consists of a periodic array of copper stand-up split ring resonator (SRR) adhered on a copper film ground plane. The proposed design demonstrates a high conversion efficiency of over 90% within a relative bandwidth of 88.7% and is applicable for a wide range of incident angles (0 degrees-50 degrees). The polarization conversion properties can be adjusted by changing the geometric parameters of the unit cell.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Zhixiang Xu, Cheng Ni, Yongzhi Cheng, Linhui Dong, Ling Wu
Summary: In this paper, a photo-excited metasurface (MS) based on hybrid patterned photoconductive silicon (Si) structures is proposed to achieve tunable reflective circular polarization (CP) conversion and beam deflection at two frequencies independently in the terahertz (THz) region. The proposed MS consists of a metal circular-ring (CR), Si ellipse-shaped-patch (ESP), and circular-double-split-ring (CDSR) structure, a middle dielectric substrate, and a bottom metal ground plane. By modifying the conductivity of the Si ESP and CDSR components through external infrared-beam pumping power, the proposed MS can achieve high efficiency reflective CP conversion and 2π phase shift at two distinct frequencies. A supercell MS is also constructed for reflective CP beam deflection with dynamically tunable efficiency. The proposed MS shows promising applications in active functional THz wavefront devices.
Article
Multidisciplinary Sciences
Dongru Yang, Yongzhi Cheng, Hui Luo, Fu Chen, Ling Wu
Summary: This paper presents a simple design of an ultrathin and ultra-broadband single-layer metamaterial surface (MS) based on a double-arrow-shaped resonator (DASR) structure for both transmission and reflection modes in the terahertz (THz) region. The single-layer MS consists of a periodic array of metal DASRs and complementary circular patches (CCPs) on a thin dielectric substrate. Numerical results show that the MS structure can convert circularly polarized (CP) waves to their orthogonal components after reflection and transmission simultaneously, with an average amplitude of approximately 0.45 from 0.45 to 1.75 THz and a relative bandwidth of 118.2%. The CP conversion efficiency is close to the theoretical limit of 25% for single-layer structures. Additionally, by adjusting the orientation angle (alpha) of the DASR structure along the wave propagation direction, 0-2 pi phase shifts for the reflected and transmitted orthogonal CP waves can be achieved simultaneously. Numerical simulations demonstrate wave beam deflection, vortex beam generation, and focusing effects for both reflection and transmission modes. This design offers new possibilities and potential for developing multifunctional full-space devices.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Engineering, Electrical & Electronic
Yongzhi Cheng, Yingjie Qian, Haruki Homma, Ashif Aminulloh Fathnan, Hiroki Wakatsuchi
Summary: In this study, two types of waveform-selective microwave metasurface absorbers (MMAs) were numerically and experimentally demonstrated. By designing specific circuit and geometrical parameters, these absorbers can selectively absorb signals of specific waveforms at the same frequencies, including higher-order modes. These waveform-selective MMAs have a wide range of applications in electromagnetic shielding, detection, sensing, and wireless communications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Chemistry, Physical
Fu Chen, Yongzhi Cheng, Xiangcheng Li, Hui Luo
Summary: This study successfully prepared 2D Ti3CNTx-based magnetic composites by modifying Ti3CNTx nanomaterials and combining them with magnetic materials, achieving broadband microwave absorption. The microwave absorption properties of the composites were investigated by varying the volume ratio of the nanomaterials and the filling ratio of the absorber. With a thickness of 1.32 mm, the absorber achieved a bandwidth of 4.75 GHz. Integrated with a macroscale multilayer periodic gradient design, the metastructure based on FCM (Fe@NC/Ti3CNTx) composites achieved broadband microwave absorption with an EAB of 12.5 GHz ranging from 5.5 GHz to 18 GHz at a total thickness of 4.5 mm. The microwave attenuation mechanisms were studied through dielectric loss, magnetic loss, and impedance matching. The multi-scale development of MXene-based magnetic composites enables their potential application in broadband microwave absorption.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Nan Li, Jingcheng Zhao, Peiyi Tang, Yongzhi Cheng
Summary: In this paper, a broadband and high-efficient reflective linear-circular polarization convertor (LCPC) based on three-dimensional (3D) all-metal anisotropic metamaterial (AMM) in terahertz (THz) region is proposed. The LCPC unit-cell consists of a stand-up inverted U-shaped resonator (USR) deposited on a ground plane. The designed LCPC can convert both incident x-and y -polarized (y-pol) waves from linear to circular polarization after reflection in a broadband frequency range of 1.98-4.12THz with high efficiency.
OPTICS COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Linhui Dong, Yongzhi Cheng, Hui Luo, Fu Chen, Xiangcheng Li
Summary: This paper proposes an all-metal metasurface that enables circular polarization conversion and wavefront manipulation of terahertz waves. Numerical simulations demonstrate high transmission and reflection conversion coefficients over a wide frequency range, as well as the ability to achieve 2 pi-phase full coverage. The study also showcases the multifunctional wavefront manipulation capabilities of the proposed metasurface.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Physics, Applied
Hiroki Takeshita, Daisuke Nita, Yongzhi Cheng, Ashif Aminulloh Fathnan, Hiroki Wakatsuchi
Summary: In this study, a design method for waveform-selective metasurface absorbers operating in multiple frequency bands is presented and validated through numerical and experimental verification. The method allows the absorbers to preferentially absorb target electromagnetic waves of the same frequency based on the incident waveform, specifically the pulse width. By adjusting the spatial ratio of unit cells assigned to different frequencies, the performance of the dual-band approach is enhanced. This study opens up possibilities for the utilization of waveform-selective metasurfaces in diverse frequency bands, providing a valuable and versatile solution for various applications.
APPLIED PHYSICS LETTERS
(2023)
Review
Materials Science, Biomaterials
Ling-Xin Shi, Xiu-Ran Liu, Ling-Yue Zhou, Zi-Qi Zhu, Qiong Yuan, Tao Zou
Summary: Cardiovascular diseases pose a significant threat to human health, but gene therapy shows promise in combating such diseases. The selection of appropriate carriers is crucial in gene therapy, and nanocarriers are highly valued for their ease of modification, targeting capabilities, and low toxicity. However, there are still many challenges to address in gene therapy for cardiovascular diseases.
BIOMATERIALS SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Enyu Zhou, Yongzhi Cheng, Fu Chen, Hui Luo, Xiangcheng Li
Summary: In this study, a high-gain and wideband microstrip-fed slot antenna is proposed and investigated, which consists of an anisotropic metasurface (AMS) and an aperture coupled structure. The antenna achieves four resonances by merging the AMS with an anomaly inverted pi-slot feed structure, resulting in a low profile antenna with a wide impedance bandwidth. The experimental results confirm the performance of the proposed microstrip antenna, which outperforms previous designs with a lower profile and wider operating bandwidth.
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
(2022)
