Article
Chemistry, Physical
Harim Oh, Alexander Pyatenko, Myeongkyu Lee
Summary: The study demonstrates that combining thermal and laser dewetting processes can generate more uniform metal nanoparticles, with pre-annealing leading to narrower size distribution. The obtained silver nanoparticles exhibit a strong single plasmonic resonance peak due to their narrow size distribution, showing enhanced refractive index sensitivity and figure of merit as a plasmonic sensing platform compared to particles produced via laser dewetting.
APPLIED SURFACE SCIENCE
(2021)
Review
Biochemistry & Molecular Biology
Ke Li, Yanfei Liu, Beibei Lou, Yifu Tan, Liwei Chen, Zhenbao Liu
Summary: In the past decades, DNA has been widely utilized in the field of nanostructures due to its programmable properties. This review presents different strategies for the functionalization of DNA on nanoparticle surfaces and discusses the roles of DNA in the assembly of nanostructures as well as the influencing factors. The biomedical applications of DNA-assembled nanostructures are also summarized. This review provides new insights into the application of DNA in nanostructure assembly.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Nanoscience & Nanotechnology
Marie S. Rider, Alvaro Buendia, Diego R. Abujetas, Paloma A. Huidobro, Jose A. Sanchez-Gil, Vincenzo Giannini
Summary: Topological nanophotonics is a new approach for studying nanoscale systems with unprecedented control in the visible to THz frequency range. By using nanoparticle systems to explore topological phases beyond electronic analogues, we can gain a comprehensive understanding of new topological phenomena.
Article
Nanoscience & Nanotechnology
Kangwoo Ahn, Su Yong Lee, In Hwa Cho, Yoonhee Kim, Hyon Chol Kang, Do Young Noh
Summary: The phase-separated Pt-Ni alloy nanoparticles formed by ns pulsed laser dewetting exhibit multiple domains including Pt3Ni, PtNi, and PtNi3 phases with different crystal orientations. This is in contrast to NPs of uniform composition obtained by thermal dewetting. A 3D electron density map of a dewetted PtNi NP obtained using coherent x-ray diffraction microscopy elucidates the 3D morphology of Pt- and Ni-rich regions along with a nano-cavity formed during pulsed laser irradiation.
Article
Nanoscience & Nanotechnology
Neslihan Torun, Ilker Torun, Menekse Sakir, Mustafa Kalay, M. Serdar Onses
Summary: There is a strong demand for encoded surfaces with multiple security layers that are prepared by stochastic processes and are adaptable to deterministic fabrication approaches. Dewetting instabilities in nanoscopic polymer films present a suitable platform for fabricating unclonable surfaces, with the thermal annealing-induced dewetting of P2VP enabling fabrication of randomly positioned functional features that are separated at a microscopic length scale. The patterning of P2VP films presents opportunities for fabricating hybrid security labels, which can be resolved through both stochastic and deterministic pathways, offering key opportunities in encoding applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Coatings & Films
H. K. Lin, J. J. Wang, W. H. Lu, W. S. Chuang, C. Y. Chen, H. S. Chou, J. C. Huang
Summary: The study demonstrates that AgCuAl equimolar complex concentrated alloy thin films can form nanoparticles through dewetting with a NIR pulsed-laser system. These nanoparticles mainly consist of Ag and Cu, exhibit local surface plasmon resonance peaks, and their size and wavelength can be controlled by adjusting the energy density.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Martin Rothe, Yuhang Zhao, Johannes Mueller, Guenter Kewes, Christoph T. Koch, Yan Lu, Oliver Benson
Summary: This study demonstrates local, subdiffraction limited chiral coupling of light and propagating surface plasmon polaritons in a self-assembled system. Characterization of the nanoantenna-nanowire systems is done comprehensively through various imaging techniques, supported by three-dimensional numerical simulations. The system shows promise for on-chip sensing of chiral analytes far below the diffraction limit.
Article
Chemistry, Multidisciplinary
Anirban Som, Alessandra Griffo, Indranath Chakraborty, Hendrik Haehl, Biswajit Mondal, Amrita Chakraborty, Karin Jacobs, Paivi Laaksonen, Olli Ikkala, Thalappil Pradeep, Nonappa
Summary: 2D nanomaterials possess a range of mechanical, electrical, optical, and catalytic properties. The self-assembly of atomically precise noble nanoclusters offers a modular approach for the synthesis of new generation 2D materials. This study demonstrates the self-assembly of silver nanoclusters into large-area membranes with strong and elastic properties. These membranes can be easily transferred to different substrates and enable the detection of antibiotic molecules without substrate pretreatment.
Article
Chemistry, Physical
Ali Akman, Emre Bukusoglu
Summary: The importance of colloidal self-assembly in scientific and technological advances is investigated. The self-assembly of colloids at fluidic interfaces that mediate elastic interactions is studied, and the dominant forces in the assembly of nanoparticles are found to be the electric double layer forces and the elastic forces caused by liquid crystal strain. The study also reveals the role of ion partitioning at the liquid crystal-water interfaces in the formation of assemblies. The findings have important implications for applications in sensors, microelectronics, and photonics.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Polymer Science
Anuja Das, Rabibrata Mukherjee
Summary: The research found that ultrathin polymer films exhibit random holes, threadlike morphology, and an array of droplets, with the characteristics of these dewetted droplets modulated by the addition of nanoparticles. Additionally, the dewetting process of the films is influenced differently by thermal annealing or solvent vapor exposure, with much faster dynamics observed in solvent vapor-induced dewetting.
Article
Chemistry, Multidisciplinary
Chen-Min Yang, Fang-Chung Chen
Summary: Metal nanoparticles, specifically gold nanoparticles, have position effects on the performance of perovskite light-emitting diodes. The placement of the nanoparticles directly impacts the efficiency and intensity of the devices, with different layers showing varying levels of enhancement.
Article
Chemistry, Multidisciplinary
Zhuangqiang Gao, Shikuan Shao, Weiwei Gao, Dianyong Tang, Dianping Tang, Shengli Zou, Moon J. Kim, Xiaohu Xia
Summary: The study introduces an effective method for designing morphology-stable nanoparticles with tunable plasmonic properties by controlling internal structure; Plasmonic properties of the nanoparticles can be conveniently adjusted by varying the material deposited on the inner surfaces without changing the overall morphology; The nanoparticles show potential applications in colorimetric sensing with low detection limits.
Article
Chemistry, Physical
Jing He, Xiaotong Zheng, Zhiwen Zheng, Degang Kong, Kai Ding, Ningjun Chen, Haitao Zhang, Weiqing Yang
Summary: The study successfully fabricated Ag nano-lines along the parallel boundary of nanofibers, achieving single-nanoparticle assembly through a special polymer template mechanism. Integrating Ag nano-line arrays as humidity sensors demonstrated different sensing properties at various humidity levels.
Article
Polymer Science
Iina Solala, Carlos Driemeier, Andreas Mautner, Paavo A. Penttila, Jani Seitsonen, Miika Leppanen, Karl Mihhels, Eero Kontturi
Summary: The study reported the successful directed assembly of rod-like cellulose nanocrystals using a processed cotton fiber cell wall template. It was found that during the top-down formation of CNCs via hydrolysis with HCl vapor, cellulose microfibrils in the fiber broke down to CNCs that then tightly packed together.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Fan Yang, Shunsheng Ye, Wenhao Dong, Di Zheng, Yifan Xia, Chenglin Yi, Jing Tao, Chang Sun, Lei Zhang, Lu Wang, QianYun Chen, Yazi Wang, Zhihong Nie
Summary: This study presents a facile laser-scanning-based method to fabricate quasi-3D patterned arrays of plasmonic nanoparticle dimers with controlled orientation. The approach is highly flexible in forming high-resolution patterns of plasmonic dimers of different sizes and shapes.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jason D. Fowlkes, Robert Winkler, Philip D. Rack, Harald Plank
Summary: This article presents an electron dose compensation strategy, called DBEA, to address the structural artifact issue caused by temperature gradient in 3D nanoprinting using focused electron beam-induced deposition. By modulating the electron dose, the deviations caused by temperature variations can be corrected, thus improving the printing accuracy.
Article
Optics
Domenico de Ceglia, Marco Gandolfi, Maria Antonietta Vincenti, Andrea Tognazzi, Paolo Franceschini, Alfonso C. Cino, Gina Ambrosio, Camilla Baratto, Bohan Li, Rocio Camacho-Morales, Dragmoir N. Neshev, Costantino De Angelis
Summary: We investigate transient, photo-thermally induced meta-surface effects in a planar thin-film multilayer based on a phase-transition material. Illumination with obliquely incident, phase-coherent pulsed pumps induces a reversible temperature pattern in the phase-transition layer, leading to a transient Fano-like spectral feature. The study suggests new opportunities for dynamic control of the quality factor in photonic resonances and for light modulation and switching.
Article
Physics, Applied
Boqing Liu, Tanju Yildirim, Elena Blundo, Domenico de Ceglia, Ahmed Raza Khan, Zongyou Yin, Hieu T. Nguyen, Giorgio Pettinari, Marco Felici, Antonio Polimeni, Yuerui Lu
Summary: In this study, large pressurized monolayer TMD domes were fabricated using proton irradiation, and their SHG performance was comprehensively investigated. The results showed that the intensity of SHG was effectively enhanced by around two orders of magnitude at room temperature. This giant enhancement was attributed to the distinct separation distance induced by capped pressurized gas and the hemi-spherical morphology, which enabled constructive optical interference. Moreover, the unique divergent strain field in TMD domes promoted the first experimental study on the anisotropic nonlinear optical behavior based on biaxial strain conditions.
APPLIED PHYSICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
John Lasseter, Philip D. D. Rack, Steven J. J. Randolph
Summary: This study demonstrates the selective growth of high-purity gold films onto nanoscale 3D architectures using the Me2Au (acac) precursor and pulsed laser pyrolytic chemical vapor deposition. The high thermal resistance of the nanoscale geometries enables selective deposition. The effects of laser irradiance, pulse width, and precursor pressure on the growth rate were explored, and feature-targeting resolutions of approximately 100 and 5 μm were achieved using diode lasers coupled to multimode (915 nm) and single mode (785 nm) fiber optics, respectively. Finite element thermal modeling was used to rationalize the experimental results.
Article
Physics, Fluids & Plasmas
Binan Gu, Lou Kondic, Linda J. Cummings
Summary: Pore-size gradients are used to enhance the performance of membrane filters by increasing filter lifetime and improving the utilization of membrane pore volume. In this study, we investigated the impact of pore-size gradients on the efficiency of a membrane filter with interconnected tubelike pores using mathematical modeling. Our results suggest that there is an optimal pore-radius gradient that maximizes filter efficiency, independent of the maximum pore length. Additionally, filters with longer characteristic pore length perform better.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Optics
S. Mukhopadhyay, L. Rodriguez-Sune, C. Cojocaru, M. A. Vincenti, K. Hallman, G. Leo, M. Belchovski, D. de Ceglia, M. Scalora, J. Trull
Summary: We report experimental observations and numerical simulations of second and third harmonic generation from a gold nanograting, which exhibits a plasmonic resonance in the near infrared. The resonance is tunable, with a spectral position that depends on the angle of incidence. The enhancement of nonlinear optical processes produced by the field localization in the nanograting when compared with a flat gold mirror manifests itself dramatically from the ultraviolet to the visible range, suggesting potential applications in nonlinear optics of metals at the nanoscale.
Article
Materials Science, Multidisciplinary
Luca Fagiani, Luca Bolzonello, Johann Osmond, Domenico de Ceglia, Niek van Hulst, Monica Bollani, Maria Antonietta Vincenti
Summary: This study presents a silicon-based nanostructure that can control light polarization with high precision and compact size. By leveraging the properties of quasi-bound states in the continuum, the proposed meta-polarizer converts arbitrarily polarized incoming light into linearly polarized light without the use of local phase tuning mechanisms. The experimental results demonstrate its effectiveness in compensating unwanted birefringence in optical fibers and controlling polarization in complex media environments.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
C. Baratto, M. Gandolfi, A. Tognazzi, P. Franceschini, G. Ambrosio, B. Li, R. Camacho Morales, D. de Ceglia, A. C. Cino, D. N. Neshev, C. De Angelis
Summary: An infrared optical limiting sensor has been developed for laser protection. The sensor uses metallic and dielectric photonic resonators with phase-change materials, optimized deposition by RF magnetron sputtering, and silver placement between VO2 and the substrate to improve performance. The optimum thickness for VO2 and silver films has been calculated, and characterization and resistance measurements have been performed. The sensor exhibits a transmittance drop of 70% when exposed to a laser pulse excitation.
IEEE SENSORS LETTERS
(2023)
Article
Computer Science, Information Systems
Mohammad Ali Shameli, Antonio-D Capobianco, Luca Schenato, Marco Santagiustina, Domenico De Ceglia
Summary: In this paper, a novel reconfigurable metasurface architecture is proposed and evaluated for wavefront control in millimeter-wave wireless systems. The metasurface, made of engineered silicon bricks covered with a thin film of vanadium dioxide, demonstrates anomalous reflection with 93% efficiency and 15% relative bandwidth at 60 GHz. By applying a thermal stimulus, the metasurface undergoes a phase transition in vanadium dioxide, leading to specular reflection. This device allows dynamic control of millimeter waves, making it suitable for various applications in 5G and 6G systems.
Article
Education, Special
Jason D. Fowlkes, Robert Winkler, Philip D. Rack, Harald Plank
Summary: 3D nanoprinting using focused electron beam-induced deposition is susceptible to structural distortions caused by temperature gradients. In this study, an electron dose compensation strategy called the Decelerating Beam Exposure Algorithm (DBEA) is proposed to correct for nanowire bending during computer-aided design. The DBEA utilizes an analytical solution derived from 3D nanoprinting simulations to offset undesired heating effects. This compensation strategy has the potential to improve the fidelity of 3D nanoscale printing.
RESEARCH IN AUTISM SPECTRUM DISORDERS
(2023)
Article
Chemistry, Multidisciplinary
Jason D. Fowlkes, Robert Winkler, Philip D. Rack, Harald Plank
Summary: 3D nanoprinting using focused electron beam-induced deposition often results in structural artifacts caused by temperature gradients during the deposition process. Researchers have developed an electron dose compensation strategy to correct for these artifacts and improve the precision of 3D nanoprinting.
Article
Physics, Fluids & Plasmas
Rituparna Basak, Ryan Kozlowski, Luis A. Pugnaloni, M. Kramar, Joshua E. S. Socolar, C. Manuel Carlevaro, Lou Kondic
Summary: In this study, quasi-two-dimensional experiments were conducted with photoelastic particles confined to an annular region. It was found that an intruder constrained to move in a circular path halfway between the annular walls experiences stick-slip dynamics. The response of the granular medium to the driven intruder was discussed, with a focus on the evolution of the force network during sticking periods. The analysis of the force networks using topological measures based on persistence diagrams revealed identifiable slip precursors and characteristic features in the dynamics.
Article
Computer Science, Information Systems
Mohammad Ali Shameli, Mirko Magarotto, Antonio-D Capobianco, Luca Schenato, Marco Santagiustina, Domenico De Ceglia
Summary: A novel architecture of reconfigurable, flat metalens with electrically tunable focal length is proposed for wireless communication systems operating at millimeter wave frequencies. The metalens is made of reflective silicon bricks distributed on a grounded multilayer with phase-transition material films, allowing for different focal lengths. Numerical investigation shows that the metalens can reversibly tune focal length at specific distances and remains tunable within a certain frequency range. This has significant importance for dynamically controlling the focal point of millimeter waves in wireless communications.
Proceedings Paper
Optics
J. Dong, A. Tomasino, G. Balistreri, P. You, A. Vorobiov, E. Charette, B. Le Drogoff, M. Chaker, A. Yurtsever, S. Stivala, M. A. Vincenti, C. De Angelis, D. Kip, J. Azana, R. Morandotti
Summary: We introduce a new metal-wire waveguide topology called a four-wire waveguide, which serves as both a broadband terahertz polarization-division multiplexer and a novel platform for performing independent manipulation of polarization-division multiplexed terahertz signals.
2022 PHOTONICS NORTH (PN)
(2022)
Article
Physics, Fluids & Plasmas
Luis A. Pugnaloni, C. Manuel Carlevaro, Ryan Kozlowski, Hu Zheng, Lou Kondic, Joshua E. S. Socolar
Summary: Experiments and simulations of an intruder dragged by a spring through a two-dimensional annulus of granular material show robust force fluctuations. A simple model predicts the relationship between the critical packing fraction and the width and diameter of the annulus, allowing for a data collapse. These findings challenge theories of mechanical failure in amorphous materials.
