Article
Chemistry, Multidisciplinary
Wesley Flavell, Andreas Neophytou, Angela Demetriadou, Tim Albrecht, Dwaipayan Chakrabarti
Summary: This article presents a method for programmed self-assembly of single colloidal gyroid crystals using rationally designed patchy spheres. The single colloidal gyroid has a wide photonic bandgap and rich chiroptical properties, making it an attractive chiral photonic crystal.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Andreas Neophytou, Vinothan N. Manoharan, Dwaipayan Chakrabarti
Summary: Through a computational approach, we address the challenges of design principles, self-assembly pathways, and stability of the photonic band gap. We establish the design principles for the rod-connected diamond structure (RCD) and devise two distinct self-assembly routes, showing how these routes avoid metastable amorphous phases. Finally, we demonstrate that both polymorphs support spectrally overlapping photonic band gaps.
Article
Nanoscience & Nanotechnology
Chia-Hua Hsieh, Fang-Tzu Lin, Kun-Yi Andrew Lin, Shang-Yu Hsieh, Yi-Ting Chen, Hui-Ping Tsai, Chieh-Hsuan Lu, Hongta Yang
Summary: This study successfully develops a photonic crystal material inspired by cephalopod skins, which can change its color by applying voltage. The material can maintain its appearance and lattice structure under ambient conditions and can be restored by applying an oxidation potential.
ACS APPLIED NANO MATERIALS
(2022)
Article
Multidisciplinary Sciences
Jinrong Liu, Mathias Nero, Kjell Jansson, Tom Willhammar, Mika H. Sipponen
Summary: Photonic crystals with rainbow structural colors have been successfully fabricated through centrifugation-assisted assembly of lignin nanoparticles. The centrifugation process serves to classify the nanoparticles and produce monodispersed layers, resulting in gradient colors. The dynamic rearrangement of the lignin nanoparticles during assembly into semi-closed structures is crucial for the formation of photonic crystals.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Ashish Yadav, Burak Gerislioglu, Arash Ahmadivand, Ajeet Kaushik, Gary J. Cheng, Zhengbiao Ouyang, Qing Wang, Vikram Singh Yadav, Yogendra Kumar Mishra, Yongling Wu, Yanjun Liu, Seeram RamaKrishna
Summary: Self-assembled plasmonic nano-enabled photonic crystals have shown great potential in developing next-generation photonic and opto-electronic devices. Studying the interaction between metal and non-metal materials, the spectral properties of materials, and challenges in this field is crucial for advancing plasmonic technologies.
Article
Chemistry, Physical
Weibin Li, Chen Zhang, Ding Lan, Wenjie Ji, Zhongyu Zheng, Yuren Wang
Summary: In this work, an ultrafast, robust, and scalable approach of imbibition-induced assembly is introduced, which enables rapid self-assembly of colloidal particles into ordered structures through instantaneous solvent imbibition induced by nanoporous media. Experimental observations show that the nanoporous substrate can induce strong capillary flow and direct the rapid self-assembly of particles, and the imbibition-induced assembly combined with meniscus-guided printing significantly improves the printing speed. The study successfully demonstrates an effective and ultrafast approach for assembling colloidal particles into photonic crystals with controllable sizes and shapes on the macroscale.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Hualong Sun, Hantao Zhong, Xiaping Chen, Yumeng Gan, Weiguo Wang, Chuan Zhou, Changxu Lin
Summary: In this study, two additional modes were established to mine chemical information and distinguish analytes. The molecular imprinting sensing mechanism showed good performance in the detection of organophosphorus compounds. A portable photonic crystal signal acquisition kit was designed for real-time on-site detection.
Article
Chemistry, Multidisciplinary
Ruimeng Zhang, Zhe Qiang, Muzhou Wang
Summary: This study demonstrates a model system that integrates materials synthesis and self-assembly to achieve controlled periodicity and photonic properties in block copolymer thin films. By using a photo-initiator and UV light exposure, the technique successfully modifies the periodicity in BCP films and allows for in situ modulation of stop band position in photonic gel films for practical applications. This approach provides spatially defined control over structural periodicity and macroscopic properties in self-assembled materials.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Golnaz Isapour, Marco Lattuada
Summary: Soft photonic materials formed from nanoscale colloidal crystals have versatile applications in sensing and signaling in biomedical, chemical, and mechanical scenarios, with a key advantage being structural coloration. This study proposes a simple and scalable method to prepare multiresponsive photonic materials composed of soft and adaptable components, enabling tunable structural coloration over the entire visible spectral range. These photonic microspheres can serve as optically interrogated sentinels in label-free multiplexed chemical, thermal, and mechanical sensing.
ACS APPLIED NANO MATERIALS
(2021)
Article
Multidisciplinary Sciences
Jing Zheng, Jingyuan Chen, Yakang Jin, Yan Wen, Yijiang Mu, Changjin Wu, Yufeng Wang, Penger Tong, Zhigang Li, Xu Hou, Jinyao Tang
Summary: In this study, a simple spectral selective active colloidal system is designed, in which TiO2 colloidal species are coded with spectral distinctive dyes to form a photochromic colloidal swarm. By combining incident light with various wavelengths and intensities, the particle-particle interactions can be programmed, enabling controllable colloidal gelation and segregation. This system presents a facile approach towards colored electronic paper and self-powered optical camouflage.
Article
Chemistry, Physical
Haiyang Liu, Yan Wang, Zhekun Shi, Di Tan, Xichen Yang, Lingheng Xiong, Gang Li, Yifeng Lei, Longjian Xue
Summary: A fast self-assembly method of photonic crystals with tunable structural colors is introduced. By infiltrating composite hydrogels into the gaps of silica nanoparticles, a structural color hydrogel that can quickly respond to different stimuli is obtained. With the addition of carbon nanotubes, the composite PC hydrogel can also output an electronic signal together with optical color changes.
Review
Chemistry, Physical
Junlong Liao, Changqing Ye, Prajwal Agrawal, Zhongze Gu, Yu Shrike Zhang
Summary: The article provides an overview of the basic concepts, recent progress, and applications of colloidal photonic crystals in the biomedical field, including their design, fabrication, and specific roles in various application areas.
Article
Multidisciplinary Sciences
Ahmet F. Demiroers, Erik Poloni, Maddalena Chiesa, Fabio L. Bargardi, Marco R. Binelli, Wilhelm Woigk, Lucas D. C. de Castro, Nicole Kleger, Fergal B. Coulter, Alba Sicher, Henning Galinski, Frank Scheffold, Andre R. Studart
Summary: In this study, a 3D printing platform for the assembly of colloidal particles of silica and carbon with programmable structural color is proposed. The printing parameters and ink composition are optimized to achieve objects with tunable structural color. Multimaterial printing is used to create complex-shaped objects with multiple structural colors, offering a new approach for mimicking structural color in natural systems.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Susana Marin-Aguilar, Fabrizio Camerin, Marjolein Dijkstra
Summary: The assembly of colloidal cubic diamond is a challenging process. This study explores the conditions for the nucleation of cubic diamond, focusing on the effect of depletion and DNA-mediated interactions. The study finds that a specific balance between the strength and range of depletion interactions enhances the self-assembly of stable cubic diamond.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Javier Fonseca, Lingxin Meng, Pedro Moronta, Inhar Imaz, Cefe Lopez, Daniel Maspoch
Summary: Controlling the size of COF particles allows for the fabrication of porous photonic crystals (PhCs) with a face-centered cubic arrangement. By adsorbing species within the pores of COF particles, the Bragg reflection can be altered, allowing for the modulation of the structure and properties of the PhCs. Given the abundance of existing COFs and their diverse properties, this discovery is expected to enable the development of colloidal PhCs with unprecedented functionality.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jeremie Maire, Emigdio Chavez-Angel, Guillermo Arregui, Martin F. Colombano, Nestor E. Capuj, Amadeu Griol, Alejandro Martinez, Daniel Navarro-Urrios, Jouni Ahopelto, Clivia M. Sotomayor-Torres
Summary: Controlling thermal energy transfer at the nanoscale and thermal properties is crucial, and this study focuses on the effects on thermal conductivity arising from the nanoscale structure of nanocrystalline silicon films and suspended optomechanical nanobeams. The research uses a micro time-domain thermoreflectance method and introduces a versatile contactless characterization technique for thermal conductivity measurements. In optomechanical nanostructures, the effect of reducing thermal conductivity due to smaller grains is smaller compared to membranes, indicating a competition of surface scattering.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
David Saleta Reig, Sebin Varghese, Roberta Farris, Alexander Block, Jake D. Mehew, Olle Hellman, Pawel Wozniak, Marianna Sledzinska, Alexandros El Sachat, Emigdio Chavez-Angel, Sergio O. Valenzuela, Niek F. van Hulst, Pablo Ordejon, Zeila Zanolli, Clivia M. Sotomayor Torres, Matthieu J. Verstraete, Klaas-Jan Tielrooij
Summary: This study investigates the thermal transport properties of layered transition metal dichalcogenide (TMD) crystal MoSe2. It reveals that the phonon dispersions and lifetimes change significantly with thickness, but the thinnest TMD films exhibit a thermal conductivity only slightly smaller than bulk crystals due to compensating phonon contributions. Additionally, out-of-plane heat dissipation to air molecules is remarkably efficient, particularly for the thinnest crystals, increasing the apparent thermal conductivity of monolayer MoSe2 by an order of magnitude.
ADVANCED MATERIALS
(2022)
Article
Thermodynamics
David Astrain, Juliana Jaramillo-Fernandez, Miguel Araiz, Achille Francone, Leyre Catalan, Alejandra Jacobo-Martin, Patricia Alegria, Clivia M. Sotomayor-Torres
Summary: Heat exchangers play a crucial role in optimizing the efficiency of Thermoelectric Generators (TEGs). Heat pipes without fans are preferred due to their robustness, low maintenance, and lack of moving parts. However, these heat exchangers tend to become less efficient under natural convection conditions, leading to a decrease in heat transfer capacity and thermoelectric power production. This study introduces a novel heat exchanger that combines phase change and radiative cooling in a thermoelectric generator, resulting in improved efficiency and increased electrical energy production, especially under natural convection conditions.
APPLIED THERMAL ENGINEERING
(2023)
Article
Physics, Multidisciplinary
G. Arregui, R. C. Ng, M. Albrechtsen, S. Stobbe, C. M. Sotomayor-Torres, P. D. Garcia
Summary: Confining photons in cavities enhances the interaction between light and matter. We have demonstrated how sidewall roughness in air-slot photonic-crystal waveguides can induce Anderson-localized modes with high quality factors and mode volumes below the diffraction limit. The interaction between these disorder-induced optical modes and in-plane mechanical modes is governed by a distribution of coupling rates, leading to mechanical amplification via optomechanical backaction. This study opens up new possibilities for exploring complex systems with mutually coupled degrees of freedom.
PHYSICAL REVIEW LETTERS
(2023)
Article
Polymer Science
Emigdio Chavez-Angel, Ryan C. Ng, Susanne Sandell, Jianying He, Alejandro Castro-Alvarez, Clivia M. Sotomayor Torres, Martin Kreuzer
Summary: Thermal imaging is a challenging and time-consuming task, but it is an important characterization tool in various fields. This study presents a new technique using synchrotron radiation-based Fourier-transform infrared microspectroscopy for remote non-invasive thermal field mapping with high spatial resolution. The results highlight the potential of infrared absorbance for quantitative determination of heat distribution and thermal properties in electronic devices.
Article
Physics, Multidisciplinary
Guilhem Madiot, Ryan C. Ng, Guillermo Arregui, Omar Florez, Marcus Albrechtsen, Soren Stobbe, Pedro D. Garcia, Clivia M. Sotomayor-Torres
Summary: This study investigates the optomechanical generation of coherent phonons at 6.8 GHz frequency, operating at room temperature. By using a suspended 2D silicon phononic crystal cavity with an air-slot, the phononic waveguide is turned into an optomechanical platform that allows for fine control of phonons using light. This development could potentially lead to the advancement of phononic circuitry and coherent manipulation of other solid-state properties.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Arindom Chatterjee, Ananya Banik, Alexandros El Sachat, Jose Manuel Caicedo Roque, Jessica Padilla-Pantoja, Clivia Sotomayor M. Torres, Kanishka Biswas, Jose Santiso, Emigdio Chavez-Angel
Summary: In this study, it is found that the substitution of Ca atoms in Bi2Sr2-xCaxCo2Oy alloys improves the thermoelectric properties by introducing point-defect phonon scattering, while the electronic conductivity and thermopower remain unchanged.
Article
Nanoscience & Nanotechnology
Jeremie Maire, Tomasz Necio, Emigdio Chavez-Angel, Martin F. Colombano, Juliana Jaramillo-Fernandez, Clivia M. Sotomayor-Torres, Nestor E. Capuj, Daniel Navarro-Urrios
Summary: Glass microspheres with diameters ranging from 10 to 60 μm were evaluated for their elastic and optical properties using two complementary contactless techniques. The results showed that the properties of the microspheres were reduced compared to the bulk material due to the fabrication process.
Article
Nanoscience & Nanotechnology
Jake Dudley Mehew, Marina Y. Timmermans, David Saleta Reig, Stefanie Sergeant, Marianna Sledzinska, Emigdio Chavez-Angel, Emily Gallagher, Clivia M. Sotomayor Torres, Cedric Huyghebaert, Klaas-Jan Tielrooij
Summary: Nanomaterials, particularly carbon nanotubes (CNTs), are promising candidates for applications requiring high thermal conductivity. In this study, the thermal conductivity of free-standing double-walled CNT films was measured using all-optical Raman thermometry, showing significantly enhanced thermal conduction compared to single-walled CNT films. This research contributes to a better understanding of these nanomaterials and their suitability for extreme ultraviolet (EUV) lithography.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Energy & Fuels
Arindom Chatterjee, Alexandros El Sachat, Ananya Banik, Kanishka Biswas, Alejandro Castro-Alvarez, Clivia M. M. Sotomayor Torres, Jose Santiso, Emigdio Chavez-Angel
Summary: Ca3Co4O9, a p-type thermoelectric material, has attracted attention due to its unique crystal structure and potential in thermoelectric applications. We investigated the effects of high oxygen pressure annealing on Ca3Co4O9 and found that it led to modifications in the defect chemistry, resulting in a decrease in electron hopping probability and a thermal activation-like behavior in thermopower. These findings have significant implications for the design and optimization of thermoelectric materials based on misfit cobaltates.
Article
Chemistry, Multidisciplinary
Emigdio Chavez-Angel, Polychronis Tsipas, Peng Xiao, Mohammad Taghi Ahmadi, Abdalghani H. S. Daaoub, Hatef Sadeghi, Clivia M. Sotomayor M. Torres, Athanasios Dimoulas, Alexandros El Sachat
Summary: Using van der Waals epitaxy, we engineered highly insulating thermal metamaterials based on atomically thin lattice-mismatched Bi2Se3/MoSe2 superlattices and graphene/PdSe2 heterostructures, offering exceptional thermal resistances and ultralow cross-plane thermal conductivities comparable to those of amorphous materials. Experimental data supported by calculations reveal the impact of lattice mismatch, phonon-interface scattering, size effects, temperature, and interface thermal resistance on cross-plane heat dissipation, providing valuable insights into thermal transport characteristics and synthetic methods for large-area van der Waals films.
Article
Quantum Science & Technology
V. Esteso, R. Duquennoy, R. C. Ng, M. Colautti, P. Lombardi, G. Arregui, E. Chavez-Angel, C. M. Sotomayor-Torres, P. D. Garcia, M. Hilke, C. Toninelli
Summary: An understanding of heat transport is crucial for thermal management and fundamental science research. This article introduces a portable nanothermometer based on a molecular quantum system, which allows high sensitivity and noninvasive temperature measurements in nanostructured environments and cryogenic conditions. The performance of this molecular thermometer is validated by estimating the thermal conductivity and demonstrating two-dimensional temperature mapping.
Article
Physics, Multidisciplinary
Ryan C. Ng, Paul Nizet, Daniel Navarro-Urrios, Guillermo Arregui, Marcus Albrechtsen, Pedro D. Garcia, Soren Stobbe, Clivia M. Sotomayor-Torres, Guilhem Madiot
Summary: We propose a multimodal optomechanical platform that enables efficient transduction of phonons with electronic and optical signals, allowing for the connection between the microwave and optical domains. Through stability analysis, we show that the mechanical modes can simultaneously enter a phonon lasing regime. The megahertz and gigahertz modes exhibit self-sustained oscillation, resulting in intermodulation of two frequency combs in the optical field. Experimental characterization reveals previously unexplored dynamical regimes and showcases the potential for controlling multiple mechanical degrees of freedom via a single optical mode, with implications in gigahertz phononic devices, signal processing, and optical comb sensing applications.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Optics
Guilhem Madiot, Marcus Albrechtsen, Soren Stobbe, Clivia M. Sotomayor-Torres, Guillermo Arregui
Summary: Chip-scale multimode optomechanical systems have unique benefits for sensing, metrology, and quantum technologies. This research designs and experimentally demonstrates a two-dimensional mechanical-optical-mechanical(MOM) platform that dispersively couples a slow-light slot-guided photonic-crystal waveguide mode and two slow-sound phononic wire modes localized in physically distinct regions. The results of this research are significant for engineering MOM systems with nearly degenerate mechanical modes.
Article
Engineering, Electrical & Electronic
Carlos Saez-Comet, Olga Muntada, Achille Francone, Nekane Lozano, Marta Fernandez-Regulez, Jordi Puiggali, Nikolaos Kehagias, Clivia M. Sotomayor Torres, Francesc Perez-Murano
Summary: This study presents a fabrication process for 3D micro-structured polymeric films, utilizing thermal nanoimprint lithography and plug-assisted thermoforming. The process allows for the preservation of functionality in the micro-patterned areas, making it a promising solution for the production of new functional surfaces. The technique is simple, green, and suitable for industrial fabrication of 3D nonplanar shaped surfaces.
MICRO AND NANO ENGINEERING
(2022)
