Article
Chemistry, Multidisciplinary
Maarten Stam, Indy du Fosse, Ivan Infante, Arjan J. Houtepen
Summary: This study provides theoretical insight into the effect of electron charging on InP QDs and proposes a method to avoid trap state formation during the charging process.
Article
Chemistry, Multidisciplinary
Barbara Ursula Lehner, Tim Seidelmann, Gabriel Undeutsch, Christian Schimpf, Santanu Manna, Michal Gawelczyk, Saimon Filipe Covre da Silva, Xueyong Yuan, Sandra Stroj, Doris E. Reiter, Vollrath Martin Axt, Armando Rastelli
Summary: The study investigates the behavior of entangled photon pairs from quantum dots at elevated temperatures and finds degradation in entanglement as well as changes in decay dynamics. This research provides important insights for optimizing quantum dots as sources of highly entangled photons at higher temperatures.
Article
Chemistry, Physical
Mattia Salomone, Michele Re Fiorentin, Giancarlo Cicero, Francesca Risplendi
Summary: The study analyzes the stability and electronic properties of an InSe monolayer with point defects, showing the presence of deep defect states within the band gap. It predicts that Ge as a substitution impurity of Se could be a promising material for single-photon emitters due to its optical properties and strongly peaked spectrum in the near-infrared.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Analytical
Yanli Guo, Yue Hou, Congcong Lv, Xiaohu Ma, Min Yang, Yan Jin, Baoxin Li, Wei Liu
Summary: In this study, a tetrakis(4-pyridylphenyl)ethylene-based zinc metal-organic framework with excellent aggregation-induced emission property was used for selective adsorption and detection of volatile formaldehyde in exhaled breath. This portable, low-cost paper-based platform achieved trace detection of formaldehyde and has potential as an on-the-spot screening platform for lung cancer.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Rajesh Bera, Gahyeon Kim, Dongsun Choi, Jihye Kim, Kwang Seob Jeong
Summary: Recent progress has been made in studies on the intraband photoluminescence of self-doped semiconductor nanocrystals, showing great potential for optical applications. The observation of intraband transitions in self-doped semiconductor nanocrystals is no longer limited to temporal measurements, but can also be performed under steady-state conditions. Key questions for future research mainly focus on applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Mahdi Asgari, Dominique Coquillat, Guido Menichetti, Valentina Zannier, Nina Diakonova, Wojciech Knap, Lucia Sorba, Leonardo Viti, Miriam Serena Vitiello
Summary: Low-dimensional nanosystems show promise in manipulating and controlling photons with large sensitivities, and by quantum engineering tailored energy levels of localized electrons can result in efficient quantum sensors. Utilizing few-electron physics, millimeter-wave nanodetectors have been developed to efficiently sense radiation at 0.6 THz with low noise levels, opening up prospects for quantum communications and cryptography.
Article
Chemistry, Multidisciplinary
Lorenz Pulgar-Velasquez, Jose Sierra-Ortega, Juan A. Vinasco, David Laroze, Adrian Radu, Esin Kasapoglu, Ricardo L. Restrepo, John A. Gil-Corrales, Alvaro L. Morales, Carlos A. Duque
Summary: By using the effective mass approximation in a parabolic two-band model, this study investigated the influence of geometrical parameters on electron and hole states in two types of truncated conical quantum dots. The presence of a magnetic field and shallow donor impurities were found to be significant factors affecting the optoelectronic properties of the quantum dots. Additionally, in CdSe-CdTe quantum dots, a switch between direct and indirect excitons can be controlled through geometry while maintaining axial symmetry.
Article
Chemistry, Multidisciplinary
Chengzhi Xu, Jizhen Kang, Yanqiu Zhao, Lian Zhu, Juntao Zhang, Benmei Wei, Haibo Wang
Summary: Fish scale collagen peptides were used as precursors to prepare carbon dots via conventional hydrothermal (CDs-HT) and microwave (CDs-MW) methods, and the optical properties and structure of the resulting carbon dots were compared. Both methods produced carbon dots with blue fluorescence and excitation-dependent emission. The microwave method facilitated self-doping of nitrogen due to rapid and uniform heating. However, the conventional hydrothermal method, with its controllable high-temperature sealing environment, promoted complete dehydration and condensation of the precursor, resulting in smaller-sized carbon dots with a higher quantum yield (9.29% versus 4.86%) compared to the microwave method.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
Baris Cakmak, Ozgur E. Mustecaplioglu, Mauro Paternostro, Bassano Vacchini, Steve Campbell
Summary: This study investigates the implications of quantum Darwinism in a composite quantum system with interacting constituents and a decoherence-free subspace. The results show that part of the system Hilbert space redundantly proliferates its information to the environment, while the remaining subspace preserves non-classical signatures. Measurements performed on the system reveal a non-zero quantum discord shared between the composite system and the environment, violating the conditions of strong Darwinism. Despite this, due to the asymmetry of quantum discord, the information shared with the environment is completely classical for measurements performed on the environment.
Article
Spectroscopy
Guocong Ma, Rui Wang, Mina Zhang, Zhenfeng Dong, Anying Zhang, Meiru Qu, Lu Gao, Yanying Wei, Jianfei Wei
Summary: This research developed a novel method to recycle PET waste by using it as a precursor for nitrogen-doped carbon dots (NCDs) preparation. PET waste was converted into PET oligomers through alcoholysis with ethylene glycol. Then, NCDs were synthesized by solvothermal method using a mixture of PET oligomers, pyromellitic acid dianhydride, and urea in tetrahydrofuran (THF) as precursors. The as-prepared NCDs showed a spherical structure with an average particle size of 2.3 nm and exhibited excitation-independent emission properties with excitation and emission peaks at 360 nm and 470 nm. The fluorescence quantum yield of NCDs was 48.16%. Moreover, NCDs were applied in LED devices to emit yellow light (0.55, 0.44) at 2018 K and warm white light (0.37, 0.31) at 3783 K. Additionally, NCDs could be used as a fluorescent probe for water detection in organic solvents based on dynamic quenching, with a limit of detection (LOD) of 0.00001%.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Materials Science, Multidisciplinary
Stefania Castelletto, Filippo De Angelis, Alberto Boretti
Summary: This review provides an overview of the research progress in utilizing perovskite nanocrystals for optoelectronic applications and quantum light generation. The demonstrations of single-photon emission in various perovskite nanocrystals are compared with other technologically mature materials. The prospects and challenges of nanoengineering the nanocrystals to improve single-photon emission properties are discussed, along with the potential for generating quantum light sources.
APPLIED MATERIALS TODAY
(2022)
Article
Chemistry, Multidisciplinary
Oleg Korepanov, Olga Aleksandrova, Dmitrii Firsov, Zamir Kalazhokov, Demid Kirilenko, Dmitriy Kozodaev, Vasilii Matveev, Dmitriy Mazing, Vyacheslav Moshnikov
Summary: This article reports a synthesis protocol of polyvinylpyrrolidone-capped AgInS2 quantum dots in aqueous solution. The morphology and chemical composition of the nanoparticles were studied using TEM, XRD, XPS, and FTIR. The obtained quantum dots exhibited luminescence in the visible range, with the wavelength of the emission maximum varying with the [Ag]:[In] molar ratio. The temperature dependence of the photoluminescence intensity of the polyvinylpyrrolidone-capped AgInS2 quantum dots was investigated within the temperature range of 11-294 K.
Article
Chemistry, Analytical
Yumei Yan, Zhili Liu, Wenfeng Zhou, Haixiang Gao, Runhua Lu
Summary: In this study, three patterns for detecting fenpyroximate using gold nanoparticles as response signals were described. The strong interaction between the guanidine group of arginine-modified gold nanoparticles and the ester group of fenpyroximate led to aggregation of the nanoparticles, resulting in changes in UV-visible light spectrum and solution color. Sensors were constructed based on the correlation between fenpyroximate concentration and absorbance ratio, and the R value was obtained by analyzing the color of the test solution using a smartphone. Additionally, a fluorescence method based on fluorescence off-on was developed, with the fluorescence quenching of rhodamine B found to increase linearly within a certain concentration range. These three patterns demonstrated highly selective and sensitive response signals for fenpyroximate, and were successfully applied in detecting fenpyroximate in various samples.
ANALYTICAL METHODS
(2023)
Article
Physics, Multidisciplinary
H. Ait Mansour, F-Z Siyouri
Summary: This study tests the ability of the Wigner function to reveal and capture quantum entanglement in two coupled semiconductor quantum dots. The evolution of the entanglement with respect to temperature and time is analyzed in both Markovian and non-Markovian environments. Additionally, the effects of Forster interaction on the entanglement are compared.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Yongxin Zeng, Allan H. MacDonald
Summary: This paper examines the influence of moiré patterns in semiconductor heterobilayers on exciton and trion states, comparing the differences to the case of excitons and trions in semiconductor quantum dots in the limit of strong moiré modulation potentials. The strategies for using optical properties as quantitative probes of moiré materials and the prospects of utilizing moiré materials to design unique light emitters are discussed.
Article
Nanoscience & Nanotechnology
Steven Limpert, Adam Burke, I-Ju Chen, Nicklas Anttu, Sebastian Lehmann, Sofia Fahlvik, Stephen Bremner, Gavin Conibeer, Claes Thelander, Mats-Erik Pistol, Heiner Linke
Article
Nanoscience & Nanotechnology
Martin Josefsson, Artis Svilans, Adam M. Burke, Eric A. Hoffmann, Sofia Fahlvik, Claes Thelander, Martin Leijnse, Heiner Linke
NATURE NANOTECHNOLOGY
(2018)
Article
Physics, Multidisciplinary
I-Ju Chen, Adam Burke, Artis Svilans, Heiner Linke, Claes Thelander
PHYSICAL REVIEW LETTERS
(2018)
Article
Nanoscience & Nanotechnology
S. Dorsch, B. Dalelkhan, S. Fahlvik, A. M. Burke
Article
Nanoscience & Nanotechnology
J. G. Gluschke, J. Seidl, A. M. Burke, R. W. Lyttleton, D. J. Carrad, A. R. Ullah, S. Fahlvik, S. Lehmann, H. Linke, A. P. Micolich
Article
Physics, Multidisciplinary
Artis Svilans, Martin Josefsson, Adam M. Burke, Sofia Fahlvik, Claes Thelander, Heiner Linke, Martin Leijnse
PHYSICAL REVIEW LETTERS
(2018)
Article
Physics, Applied
E. Cimpoiasu, B. R. Dunphy, S. Mack, J. A. Christodoulides, B. Lunsford-Poe, B. R. Bennett
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Chemistry, Multidisciplinary
I-Ju Chen, Steven Limpert, Wondwosen Metaferia, Claes Thelander, Lars Samuelson, Federico Capasso, Adam M. Burke, Heiner Linke
Article
Nanoscience & Nanotechnology
Jonatan Fast, Enrique Barrigon, Mukesh Kumar, Yang Chen, Lars Samuelson, Magnus Borgstrom, Anders Gustafsson, Steven Limpert, Adam Burke, Heiner Linke
Article
Chemistry, Multidisciplinary
Sven Dorsch, Artis Svilans, Martin Josefsson, Bahareh Goldozian, Mukesh Kumar, Claes Thelander, Andreas Wacker, Adam Burke
Summary: Studies on thermally induced transport in nanostructures explore the conversion of heat into electrical power, demonstrating the versatility of the design to study fluctuations and fundamental nanothermodynamics. By enhancing the temperature of the phonon bath near the double quantum dot, phonon-assisted transport is enabled while affecting conventional thermoelectric transport. The study shows sensitivity of phonon-assisted transport to excited states.
Article
Physics, Multidisciplinary
Sven Dorsch, Sofia Fahlvik, Adam Burke
Summary: The research demonstrates a device architecture where bottom-gates are capacitively coupled to a nanowire and function as local joule heaters, enabling local heating at different locations and offering rich experimental possibilities.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Physical
Jonatan Fast, Yen-Po Liu, Yang Chen, Lars Samuelson, Adam M. Burke, Heiner Linke, Anders Mikkelsen
Summary: Researchers used a new optical-beam-induced current characterization method to study the performance of semiconductor nanowire devices. The experiment revealed the mechanism of hot-electron extraction and estimated the spatial region where significant extraction could occur.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sven Dorsch, In-Pyo Yeo, Sebastian Lehmann, Kimberly Dick, Claes Thelander, Adam Burke
Summary: The study focuses on bottom-gated device architectures for achieving single and serial multiquantum dot systems in p-type GaSb nanowires, indicating the highly localized effect of potentials applied to gate electrodes preventing the formation of double quantum dots. Additionally, large gate-voltage dependent variations of g* factors and spin-orbit energies were found in a single quantum dot induced by bottom gating.
Article
Materials Science, Multidisciplinary
Heidi Potts, Martin Leijnse, Adam Burke, Malin Nilsson, Sebastian Lehmann, Kimberly A. Dick, Claes Thelander
Article
Materials Science, Multidisciplinary
Claes Thelander, Malin Nilsson, Florinda Vinas Bostrom, Adam Burke, Sebastian Lehmann, Kimberly A. Dick, Martin Leijnse
