Article
Chemistry, Physical
S. Abhirami, E. P. Amaladass, K. Saravanan, C. David, S. Amirthapandian, R. M. Sarguna, Awadhesh Mani
Summary: Ion irradiation with antimony ions has been used to induce isoelectronic doping in thin films of bismuth selenide, leading to changes in magnetoresistance behavior and quantum coherence signatures. The irradiation is found to alter the electronic transport properties and coherence phenomena in Bi2Se3-based topological insulator systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Blaz Belec, Nina Kostevsek, Giulia Della Pelle, Sebastjan Nemec, Slavko Kralj, Martina Bergant Marusic, Sandra Gardonio, Mattia Fanetti, Matjaz Valant
Summary: This study investigated the possibility of using silica as a biocompatible coating for Bi2Se3 nanoparticles, instead of ethylene-glycol. The results showed that, except for nanoparticles with a thick silica layer of approximately 200 nm, the coated nanoparticles retained their optical properties. Compared to ethylene-glycol coated nanoparticles, these silica coated nanoparticles exhibited improved photo-thermal conversion and required lower concentrations to reach the desired temperatures. In vitro experiments demonstrated that silica coated nanoparticles were biocompatible, unlike ethylene-glycol coated nanoparticles.
Article
Physics, Condensed Matter
Alexander Beach, Dalmau Reig-i-Plessis, Gregory MacDougall, Nadya Mason
Summary: Asymmetric Fraunhofer patterns were observed in the resistance maps of a Bi2Se3 junction, even at zero parallel field and up to a temperature of 1 K. The geometric effects were shown to dominate the patterns, independent of the in-plane field magnitude. These results are crucial for distinguishing between geometric phase shifts and shifts caused by momentum shifting of Cooper pairs, Majorana mode signatures, or other unconventional superconducting behavior.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
Sukanta Nandi, Shany Cohen, Danveer Singh, Michal Poplinger, Pilkhaz Nanikashvili, Doron Naveh, Tomer Lewi
Summary: This study investigates the mid-infrared (MIR) properties of chemical vapor deposition-grown Bi2Se3 nanobeams using a combination of far-field and near-field nanoscale imaging and spectroscopy. The results reveal the high refractive index values of Bi2Se3 and demonstrate its Mie resonances in the MIR. The study also provides experimental evidence for the potential applications of Bi2Se3 in quantum circuitry, nonlinear generation, high-Q metaphotonics, and photodetection.
Article
Chemistry, Multidisciplinary
Hazlihan Haris, Tan Sin Jin, Malathy Batumalay, Ahmad Razif Muhammad, Jahariah Sampe, Arni Munira Markom, Huda Adnan Zain, Sulaiman Wadi Harun, Megat Muhammad Ikhsan Megat Hasnan, Ismail Saad
Summary: In this study, we synthesized a Bismuth Selenide (Bi2Se3) saturable absorber (SA) and successfully generated two types of soliton pulses using different laser cavity configurations. These solitons operated at fundamental repetition rates of 23.3 MHz and 13 MHz, and exhibited Kelly sidebands and peak-dip sidebands, respectively. The addition of single mode fiber (SMF) split the soliton pulse into 44 pulses with bunched oscillation envelope and imposed peak-dip sidebands due to constructive and destructive interferences. The measured pulse widths were 0.63 ps and 1.52 ps for the solitons with Kelly sidebands and peak-dip sidebands, respectively. This research demonstrates the potential of Bi2Se3 SAs in generating different types of soliton pulses, with potential applications in optical communication and spectroscopy.
Article
Chemistry, Multidisciplinary
Dedi, Ping-Chung Lee, Pai-Chun Wei, Yang-Yuan Chen
Summary: This study reports on the thermoelectric properties of topological insulator bismuth selenide nanowires, achieved using a specially designed platform for simultaneous measurements on a single wire. Experimental results on the properties of conductivity, Seebeck coefficient, and thermal conductivity were found to be in good agreement with theoretical studies.
Article
Chemistry, Multidisciplinary
Kirill A. Kuznetsov, Sergey A. Tarasenko, Polina M. Kovaleva, Petr Kuznetsov, Denis Lavrukhin, Yury G. Goncharov, Alexander A. Ezhov, Dmitry S. Ponomarev, Galiya Kh Kitaeva
Summary: This study discusses experimental and theoretical studies on the generation of the third terahertz frequency harmonic in topological insulator thin films and the generation of THz radiation in photoconductive antennas based on these films. The results show that frequency conversion in topological insulators is highly efficient due to the linear energy spectrum of the surface carriers and fast energy dissipation. The findings open up possibilities for advancing topological insulator-based films into efficient THz wave generators and frequency converters.
Article
Materials Science, Multidisciplinary
Soheil Ghods, Ali Esfandiar, Jun-Hui Choi, Azam Iraji Zad, Mukkath Joseph Josline, Sein Kim, Jae-Hyun Lee
Summary: In this study, high-performance broadband photodetectors based on a mixed-dimensional heterostructure of topological insulator Bi2Se3 nanoparticles with the semiconductor WSe2 were implemented, demonstrating excellent photoresponsivity and fast response time. The enhancement in photoresponsivity, response time, and broadband photoresponse of the Bi2Se3 NPs/WSe2 structure compared to typical semiconductor structures can be attributed to the gapless behavior in surface states of topological insulator materials. Simulations confirmed a significant increase in the interfacial electric field in the Bi2Se3 NPs/WSe2 structure due to the surface states in topological insulator nanoparticles, paving the way for efficient optoelectronic devices based on these materials.
MATERIALS TODAY PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Yixuan Ren, Yuqi Li, Xingzhao Liu
Summary: A van der Waals heterojunction was successfully constructed using molecular beam epitaxy with topological insulator (TI) Bi2Se3 and traditional narrow-gap PbSe, showing high-quality crystallization and an atomically abrupt heterointerface. The as-fabricated Bi2Se3-PbSe photodetector achieved prominent photosensitivity in the infrared band, with responsivity and detectivity under zero bias reaching 3.9 A W^-1 and 8.7 x 10^11 cm Hz^0.5 W^-1, respectively. The fast response speed, along with the high photosensitivity, suggests that the construction of TI Bi2Se3-PbSe heterojunction is a promising solution for high-performance infrared photodetectors.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Article
Biochemical Research Methods
Babak Ghafaryasl, Koenraad A. Vermeer, Jeroen Kalkman, Tom Callewaert, Johannes F. de Boer, Lucas J. van Vliet
Summary: Optical coherence tomography (OCT) is widely used for capturing structural information of tissues for clinical tasks such as diagnosing retinal and vascular diseases. Recently, there has been a growing interest in the field of ophthalmology for utilizing optical tissue properties for diagnosis and disease progression.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Nanoscience & Nanotechnology
Dima Sadek, Daya S. Dhungana, Roland Coratger, Corentin Durand, Arnaud Proietti, Quentin Gravelier, Benjamin Reig, Emmanuelle Daran, Pier Francesco Fazzini, Fuccio Cristiano, Alexandre Arnoult, Sebastien R. Plissard
Summary: The bismuth-antimony alloy is the first reported 3D topological insulator with promising potential for spintronic applications. This work successfully demonstrates the integration of high-quality rhombohedral BiSb topological insulators on a GaAs substrate, showcasing epitaxial relationship and relaxed TI layer growth.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biochemical Research Methods
Vikram Barauah, Shyon Parsa, Naail Chowdhury, Thomas Milner, Henry Grady Rylander III
Summary: This study investigates the detection of morphological changes in Bacillus subtilis using scattering angle resolved optical coherence tomography (SAR-OCT). The results show significant differences in the distribution of backscattering angle during the rod-to-coccus shape transition of the bacteria. The study supports the potential of utilizing SAR-OCT to detect bacterial morphological changes.
JOURNAL OF BIOMEDICAL OPTICS
(2022)
Article
Chemistry, Multidisciplinary
Raj Kumar, Cristian V. Ciobanu, Somilkumar J. Rathi, Joseph E. Brom, Joan M. Redwing, Frank Hunte
Summary: This study reports on the manifestations of superconducting electrons carried by topological surface states (TSS) in Bi2Se3 films. By measuring the magnetoresistance (MR) and anisotropic magnetoresistance (AMR), key features of TSS-carried Cooper pairs are uncovered. These findings can guide novel developments in superconductor/topological insulator quantum devices relying on supercurrent detection and lead to more refined transport signatures of Majorana zero-modes in the future.
Article
Materials Science, Multidisciplinary
Jufeng Wang, Xia Sun, Hongjian Du, Chuanxu Ma, Bing Wang
Summary: The electronic and topological properties of ultrathin Bi(110) films on a Cu(111) substrate are studied using experimental and computational methods. It is found that the stacking modes and atomic buckling heights have significant effects on the properties of the films. In 2-BL films, the electronic and topological properties are independent of the substrate and surface atomic buckling height. In 1-BL films, the properties are influenced by the stacking modes between the bilayer and substrate.
Article
Nanoscience & Nanotechnology
Youqiang Huang, Gongxun Bai, Yingjie Zhao, Yuan Liu, Shiqing Xu, Jianhua Hao
Summary: Enhanced near-infrared photo-thermal conversion efficiency is achieved in topological Bi2Se3 nanosheets by introducing a lanthanide dopant, providing new insights for the increase in the efficiency of photothermal materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Zhuolei Zhang, Artiom Skripka, Jakob C. Dahl, Chaochao Dun, Jeffrey J. Urban, Daniel Jaque, P. James Schuck, Bruce E. Cohen, Emory M. Chan
Summary: This article demonstrates the controllable synthesis of low-phonon-energy KPb2X5 (X=Cl, Br) nanoparticles and the ability to tune nanocrystal phonon energies as low as 128 cm(-1). KPb2Cl5 nanoparticles are moisture resistant and can be efficiently doped with lighter lanthanides. The low phonon energies of KPb2X5 nanoparticles promote upconversion luminescence from higher lanthanide excited states and enable highly nonlinear, avalanche-like emission from KPb2Cl5 : Nd3+ nanoparticles. The realization of nanoparticles with tunable, ultra-low phonon energies facilitates the discovery of nanomaterials with phonon-dependent properties, precisely engineered for applications in nanoscale imaging, sensing, luminescence thermometry and energy conversion.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Tamara Munoz-Ortiz, Idoia Alayeto, Jose Lifante, Dirk H. Ortgies, Riccardo Marin, Emma Martin Rodriguez, Maria del Carmen Iglesias de la Cruz, Gines Lifante-Pedrola, Jorge Rubio-Retama, Daniel Jaque
Summary: Nanothermometry utilizes nanoparticles as thermal probes, enabling remote and minimally invasive sensing. It has emerged as a powerful tool in biomedicine. However, the lack of 3D thermal imaging capability and readily available tools in clinic hinders its translation to the bedside.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Khouloud Hamraoui, Vivian Andrea Torres-Vera, Irene Zabala Gutierrez, Alejandro Casillas-Rubio, Mohammed Alqudwa Fattouh, Antonio Benayas, Riccardo Marin, Marta Maria Natile, Miguel Manso Silvan, Juan Rubio-Zuazo, Daniel Jaque, Sonia Melle, Oscar G. Calderoin, Jorge Rubio-Retama
Summary: Rare-earth doped nanoparticles (RENPs) have attracted increasing interest in materials science due to their optical, magnetic, and chemical properties. RENPs can emit and absorb radiation in the second biological window (NIR-II, 1000-1400 nm), making them ideal optical probes for in vivo imaging. The optimization of thermal sensitivity in RENPs depends on the core chemical composition and size, active-shell, and outer-inert-shell thicknesses.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Liyan Ming, Irene Zabala-Gutierrez, Paloma Rodriguez-Sevilla, Jorge Rubio Retama, Daniel Jaque, Riccardo Marin, Erving Ximendes
Summary: This article introduces a luminescence lifetime estimation method based on U-NET to improve the estimation accuracy under extremely low signal-to-noise ratio conditions. The effectiveness of U-NET is demonstrated in luminescence lifetime thermometry and its sensing performance improvement is verified through two experiments under extreme measurement conditions.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Carlos D. S. Brites, Riccardo Marin, Markus Suta, Albano N. Carneiro Neto, Erving Ximendes, Daniel Jaque, Luis D. Carlos
Summary: Luminescence (nano)thermometry is a remote sensing technique that utilizes the temperature dependency of luminescence features to measure temperature. It has potential applications in various fields and requires the establishment of a theoretical background, standardized practices, and improved readouts through multiparametric analysis and artificial intelligence algorithms. Challenges in luminescence thermometry and the need for continuous innovation are also discussed.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ana C. C. Soares, Tasso O. Sales, Erving C. Ximendes, Daniel Jaque, Carlos Jacinto
Summary: In recent years, there has been significant interest in infrared emitting luminescent nanothermometers due to their potential for new diagnosis and therapy procedures. However, concerns have been raised regarding their reliability, as tissues can induce spectral distortions even in the commonly used second biological window. In this study, the effectiveness of shifting the operation range of these nanothermometers to the third biological window is demonstrated, showing minimal distortion by tissue and opening the path to reliable luminescence thermometry. Advanced analysis of emission spectra allows for sub-degree thermal uncertainties.
NANOSCALE ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
W. M. Piotrowski, R. Marin, M. Szymczak, E. Martin Rodriguez, D. H. Ortgies, P. Rodriguez-Sevilla, P. Bolek, M. D. Dramicanin, D. Jaque, L. Marciniak
Summary: Near-infrared (NIR) luminescence thermometry is a reliable method for remote thermal sensing and imaging. Lanthanide (Ln(3+))-based nanophosphors are commonly used as NIR nanothermometers, but the combination of Ln(3+) with transition metal (TM) ions can enhance the sensitivity of the thermometric approach. However, there are few examples of luminescence nanothermometers combining both TM and Ln(3+), leaving room for further exploration of these systems.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Wojciech M. Piotrowski, Maja Szymczak, Emma Martin Rodriguez, Riccardo Marin, Marta Henklewska, Blazej Pozniak, Miroslav Dramicanin, Lukasz Marciniak
Summary: The increasing popularity of luminescent nanothermometry in recent years is due to its potential application in biomedicine. This study introduces a biocompatible bimodal luminescent thermometer that operates in ratiometric and luminescence lifetime modes, offering high sensitivity and low cytotoxicity, making it suitable for bioapplications.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Walaa Mohammad, K. David Wegner, Clothilde Comby-Zerbino, Vanessa Trouillet, Marina Paris Ogayar, Jean-luc Coll, Riccardo Marin, Daniel Jaque Garcia, Ute Resch-Genger, Rodolphe Antoine, Xavier Le Guevel
Summary: In this study, ultra-small gold nanoparticles stabilized by co-ligands were synthesized, and their physicochemical properties were controlled by the amount of reducing agent used. The absorption cross-section was significantly increased by precisely controlling the reducing agent, which in turn influenced the photoluminescence quantum yield. The results suggest that the physicochemical properties of the ligand shell can be tuned to control the near-infrared absorption and photoluminescence of the gold nanoparticles.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Marina Paris Ogayar, Diego Mendez-Gonzalez, Irene Zabala Gutierrez, Alvaro Artiga, Jorge Rubio-Retama, Oscar G. Calderon, Sonia Melle, Aida Serrano, Ana Espinosa, Daniel Jaque, Riccardo Marin
Summary: Luminescence nanothermometry is a technique that uses luminescence signals from nanosized materials to remotely and minimally invasively measure temperature. However, in a biomedical context, the reliability of temperature measurement is compromised by bias caused by environmental conditions. This study reveals an unexpected source of bias induced by metal ions, which enhances the emission of Ag2S nanothermometers. These findings highlight the need for caution when using luminescence nanothermometry in complex biological environments.