Article
Chemistry, Physical
Tom Galle, Daniel Spittel, Nelli Weiss, Volodymyr Shamraienko, Helena Decker, Maximilian Georgi, Rene Huebner, Nadia Metzkow, Christine Steinbach, Dana Schwarz, Vladimir Lesnyak, Alexander Eychmueller
Summary: The research transforms CdSe NPLs into PbSe NPLs suitable for optoelectronic applications through cation exchange, ligand exchange, and electronic coupling, successfully fabricating a photodetector with fast light response at low operational voltages on a commercial substrate.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Avisek Dutta, Anusri Medda, Soubhik Ghosh, Sumanta Sain, Amitava Patra
Summary: This work highlights the influence of reaction growth time on the properties of cadmium chalcogenide nanoplatelets, with a focus on structural and photophysical aspects. By extending the growth time, improvements in photoluminescence emission and decay time have been achieved, as well as slower dynamics in bleach recovery. The CdSe/CdS CS NPLs-based photodetectors show promising performance for next-generation optoelectronic applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Igor M. Goncalves, Anusri Medda, Alyson J. A. Carvalho, Ceciilia L. A. V. Campos, Soubhik Ghosh, Anderson S. L. Gomes, Amitava Patra
Summary: The nonlinear optical response of CdSe and CdSe/CdS core/shell nanoplatelets in toluene suspension was studied using Z-scan and optical Kerr gate techniques. The Z-scan analysis yielded nonlinear coefficients of n(2) = 1.4 x 10(-16) cm(2)/W and n(2) = 1.3 x 10(-16) cm(2)/W for CdSe and CdSe/CdS NPLs, respectively. The dominant behavior was fifth-order nonlinear absorption, with alpha(4) = 4.0 x 10(-2) cm/GW for CdSe NPLs and alpha(4) = 9.0 x 10(-3) cm/GW for CdSe/CdS NPLs. The results from Z-scan and optical Kerr gate were in good agreement, and the response time from OKG was less than 1 ps for all materials. NLA was observed for CdSe and CdSe/CdS NPLs but not for toluene, indicating that the presence of NPLs reduces the threshold of absorptive nonlinearity. The electronic structure of the materials was discussed to explain the results.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Lina Makke, Ningyuan Fu, Henri Lehouelleur, Hong Po, Corentin Dabard, Leonardo Curti, Erwan Bossavit, Xiang Zhen Xu, Gilles Patriarche, Debora Pierucci, Mathieu G. Silly, Emmanuel Lhuillier, Sandrine Ithurria
Summary: The surface chemistry significantly impacts the shape preservation of nanoparticles. Copper exchange on CdSe nanoparticles with thiols as ligands can result in a roughness-free 2D object.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
William E. Buhro, Chenguang Ji
Summary: Two-phase ligand exchange can convert the amine-ligated nanoplatelets to NMF-ligated ones, and further ligand exchange can lead to halometallate-ligated CdSe nanoplatelets. Analysis of the absorption spectra and X-ray diffraction data confirms the intact, Z-type binding of the halometallates.
CHEMISTRY OF MATERIALS
(2022)
Article
Multidisciplinary Sciences
Isaac G. Juma, Gwangwoo Kim, Deep Jariwala, Sanjay K. Behura
Summary: This article presents a perspective on synthetic strategies involving direct nucleation of h-BN on various dielectric substrates and its heterostructures with graphene. Mechanistic understanding and design methodologies for direct growth of h-BN via bottom-up approaches are reviewed, showcasing the potential practical applications of these complex 2D heterostructures.
Article
Chemistry, Multidisciplinary
Fuzhao Li, Lars F. Klepzig, Nils Keppler, Peter Behrens, Nadja C. Bigall, Henning Menzel, Jannika Lauth
Summary: In this study, we demonstrate the fabrication of photoluminescent polymer-encapsulated 2D CdSe/CdS NPLs nanocomposite coatings using the LbL deposition technique. The repulsive forces between the NPLs are increased to form flat-arranged nanocomposites, and the photoluminescence properties are successfully retained. This approach allows for the preparation of stable polymer-encapsulated CdSe/CdS NPLs in smooth coatings with controllable film thickness.
Review
Chemistry, Multidisciplinary
Monika Patel, Neelgund Ramesh Hemanth, Jeny Gosai, Ranjit Mohili, Ankur Solanki, Mohendra Roy, Baizeng Fang, Nitin K. Chaudhari
Summary: This article reviews the recent progress in MXene as a potential material for artificial synapses, including mechanism, characteristics, power efficiency, and scalability. The future development of MXene in the field of artificial intelligence and the challenges in integrating memristors with MXene are also discussed briefly.
TRENDS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Rina Ibragimova, Paul Erhart, Patrick Rinke, Hannu-Pekka Komsa
Summary: This study explores the distribution and composition of surface functional groups on different MXenes using a multiscale computational approach. It shows that mixtures of functional groups are favorable on all studied MXene surfaces and that the distribution of functional groups is largely independent of the type of metal, carbon, or nitrogen species and/or number of atomic layers in the MXene. Some properties strongly depend on surface composition, while others exhibit only weak dependence.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Alexander I. Lebedev
Summary: In this study, the microscopic mechanisms of spontaneous strain and folding in Janus CdSe nanoplatelets are investigated using first-principles calculations. Three mechanisms are identified, including two bulk mechanisms related to the electric field created by the difference in electronegativities of ligands and the depolarizing field resulting from potential jumps in electrical double layers, and a predominant mechanism associated with surface strain of nanoplatelets through bridging bonds.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Di Wei, Feiyao Yang, Zhuoheng Jiang, Zhonglin Wang
Summary: Iontronics explores the interactions between electrons and ions, which are crucial in various scientific fields. Osmotic power source, as a representative example, converts ion gradients into electrical energy. However, traditional osmotic power sources have limitations such as low power output, sensitivity to humidity, and inability to operate under freezing conditions. In this study, researchers developed an ultrathin osmotic power source using 2D nanofluidic graphene oxide material, which achieved high voltage, energy density, and power density values. By combining it with a triboelectric nanogenerator, a self-charged conformable triboiontronic device was created. Furthermore, the use of 3D aerogel enhanced the power density and allowed the device to operate under extreme conditions. This research demonstrates the potential of graphene oxide-based osmotic power sources in overcoming limitations and powering future electronic devices.
NATURE COMMUNICATIONS
(2022)
Review
Materials Science, Multidisciplinary
Zitong Zhang, Handong Sun
Summary: This article systematically summarizes the band structure engineering approaches in the CdSe NPL family and compares the optical properties and device performance metrics of these deliberately engineered NPLs. Furthermore, it discusses the recent advanced studies of the motivation and assembly methods of geometrically anisotropic CdSe NPL superlattices, highlighting the current challenges and future outlook on the controlled modification of optical features in CdSe NPL-based devices' performance.
ADVANCED PHOTONICS RESEARCH
(2021)
Article
Chemistry, Physical
Corentin Dabard, Josep Planelles, Hong Po, Eva Izquierdo, Lina Makke, Charlie Greboval, Nicolas Moghaddam, Adrien Khalili, Tung Huu Dang, Audrey Chu, Stefano Pierini, Claire Abadie, Mariarosa Cavallo, Erwan Bossavit, Xiang Zhen Xu, Philippe Hollander, Mathieu Silly, Emmanuel Lhuillier, Juan I. Climente, Sandrine Ithurria
Summary: An optimized procedure was proposed for the growth of alloyed HgSe1-xTex NPLs, resulting in bright photoluminescence. With well-defined structural properties, the electronic properties of these objects can now be studied. A combination of methods clarified the origin of the similarity in absorption spectra of NPLs.
CHEMISTRY OF MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Bei Zhao, Dingyi Shen, Zucheng Zhang, Ping Lu, Mongur Hossain, Jia Li, Bo Li, Xidong Duan
Summary: The article mainly introduces the research progress of 2D metallic/semimetallic transition metal dichalcogenides (m-TMDs), including their unique structures, synthetic approaches, physical properties, and applications, while also pointing out the current challenges and prospects.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Mingge Yang, Ziyue Wang, Jiangxiao Li, Bin Hong, Yinchang Du, Wensen Wei, Ruilong Wang, Fengguang Liu, Lin Zu
Summary: We report the structure, magnetic and electrical/thermal transport properties of the antiferromagnet MnSn2. The existence of two antiferromagnetic states below T-N2 (around 320 K) is confirmed by magnetism and electrical transport measurements. The results suggest that the spin arrangement plays a vital role in the magnetic, electrical, and thermal transport properties in MnSn2.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Antonio Valerio Longo, Baptiste Notebaert, Meriem Gaceur, Gilles Patriarche, Alice Sciortino, Marco Cannas, Fabrizio Messina, Hans Jurgen von Bardeleben, Nicolas Battaglini, Souad Ammar
Summary: This study demonstrates that the enhancement of orange-light luminescence of Mn-doped zinc sulfide nanoparticles induced by exposure to UV light is due to lattice-strain effects rather than passivation effects. UV irradiation in air causes surface oxidation on the nanoparticles, resulting in mechanical strains between the outer crystallographic metal sulfate lattice and the inner sulfide lattice, ultimately affecting the electronic transition processes and leading to increased emission intensity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Lucia Perez Ramirez, Niklas Fornefeld, Fabrice Bournel, Stefan Kubsky, Elena Magnano, Federica Bondino, Ulrich Kohler, Stephane Carniato, Jean-Jacques Gallet, Francois Rochet
Summary: This study investigates the adsorption and bonding modes of trimethylamine on the Si(001) surface through experimental and theoretical calculations. The majority of trimethylamine molecules were found to form acceptor H bonds with surface hydroxyls. The hydrogen-bonding modes were found to depend on temperature and coverage, which might affect the weakening of the OH bond and therefore the catalytic effects of trimethylamine.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Davide Sciacca, Maxime Berthe, Bradley J. Ryan, Nemanja Peric, Dominique Deresmes, Louis Biadala, Christophe Boyaval, Ahmed Addad, Ophelie Lancry, Raghda Makarem, Sebastien Legendre, Didier Hocrelle, Matthew G. Panthani, Geoffroy Prevot, Emmanuel Lhuillier, Pascale Diener, Bruno Grandidier
Summary: Germanane is a two-dimensional material made of stacked germanium sheets, which can be easily synthesized and has a low cost, showing potential for the development of nanoscale devices. The study focuses on the electrical transport properties of annealed microcrystalline Germanane treated with organic compounds, and finds that oxygen-free crystallites exhibit good electrical transport performance, making them suitable for back-end processes.
Article
Nanoscience & Nanotechnology
Lama Khalil, Debora Pierucci, Emilio Velez-Fort, Jose Avila, Celine Vergnaud, Pavel Dudin, Fabrice Oehler, Julien Chaste, Matthieu Jamet, Emmanuel Lhuillier, Marco Pala, Abdelkarim Ouerghi
Summary: This study visualizes the presence of a flat band near the Fermi level in the van der Waals WSe2/MoSe2 heterobilayer and confirms the coexistence of different domains with arbitrary twist angles. The strong interlayer hybridization effects are observed, which are further confirmed by complementary micro-Raman spectroscopy measurements.
Article
Chemistry, Physical
Yuwei Shen, Johanna Woodburn, Soraya Bouras, Shan Dai, Iurii Dovgaliuk, Jean-Marc Greneche, Gilles Patriarche, Latevi Max Lawson Daku, Christian Serre, Antoine Tissot
Summary: In this article, a novel strategy for preparing bistable porous nanocrystals is presented, which involves anchoring switchable molecules in the pores of a host matrix through strong host-guest interactions. The loaded nanocrystals, based on a prototypical Fe(III) spin-crossover complex in MOF-808, exhibit a hysteretic thermal spin transition close to room temperature, regardless of the complex loading and the MOF particle size, while maintaining high porosity, making them promising for applications in chemical sensing.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Giulio D'Acunto, Roman Tsyshevsky, Payam Shayesteh, Jean-Jacques Gallet, Fabrice Bournel, Francois Rochet, Indiana Pinsard, Rainer Timm, Ashley R. Head, Maija Kuklja, Joachim Schnadt
Summary: The surface chemistry during the initial growth of atomic layer deposition plays a crucial role in the subsequent growth and quality of thin films. However, the understanding of this surface chemistry is still incomplete in many cases. In this study, we carried out an operando atomic layer deposition experiment to investigate the surface chemistry of HfO2 atomic layer deposition on SiO2 from an alkylamido-hafnium precursor and water. The results showed that the decomposition of the metal precursor on the stoichiometric SiO2 surface proceeds via a bimolecular reaction mechanism, leading to the formation of Hf-bonded methyl methylene imine and free dimethylamine.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mariarosa Cavallo, Erwan Bossavit, Huichen Zhang, Corentin Dabard, Tung Huu Dang, Adrien Khalili, Claire Abadie, Rodolphe Alchaar, Dario Mastrippolito, Yoann Prado, Loic Becerra, Michael Rosticher, Mathieu G. Silly, James K. Utterback, Sandrine Ithurria, Jose Avila, Debora Pierucci, Emmanuel Lhuillier
Summary: As nanocrystal-based optoelectronics advances, there is a need for advanced techniques to reveal the electronic structure of nanocrystals, especially under device-relevant conditions. Previous efforts have mainly focused on optical spectroscopy and electrochemistry, which require an absolute energy reference. In this study, we explored the use of photoemission microscopy as a strategy for investigating nanocrystal-based devices in real-time. The method was found to be applicable to different materials and device geometries, providing direct access to important information such as metal-semiconductor interface band bending and gate effect propagation distance.
Article
Nanoscience & Nanotechnology
Jihene Zribi, Debora Pierucci, Federico Bisti, Biyuan Zheng, Jose Avila, Lama Khalil, Cyrine Ernandes, Julien Chaste, Fabrice Oehler, Marco Pala, Thomas Maroutian, Ilka Hermes, Emmanuel Lhuillier, Anlian Pan, Abdelkarim Ouerghi
Summary: By characterizing the electronic properties of a single layer WS1.4Se0.6 alloy, researchers have discovered its unique anisotropic properties. The alloy exhibits a giant unidirectional Rashba spin splitting and in-plane polarization, which could have wide-ranging applications in future electronic, piezoelectric, and spintronic devices.
Article
Nanoscience & Nanotechnology
Huichen Zhang, Victor Guilloux, Erwan Bossavit, Ningyuan Fu, Corentin Dabard, Mariarosa Cavallo, Tung Huu Dang, Adrien Khalili, Claire Abadie, Rodolphe Alchaar, Charlie Greboval, Xiang Zhen Xu, James K. Utterback, Debora Pierucci, Sandrine Ithurria, Juan I. Climente, Thierry Barisien, Emmanuel Lhuillier
Summary: In this study, we designed light amplitude modulators based on nanocrystal-based light-emitting diodes operated under reverse bias, achieving strong photoluminescence modulations for visible and near-telecom wavelengths using low bias operations (< 3 V) compatible with conventional electronics. For a visible device, we demonstrated that the photoluminescence quenching is driven by the field-induced change of nonradiative decay rate, and that the role of the field is less involved than the particle charging. This work shows that a simple diode stack can combine multiple functionalities (light-emitting diode, detector, and light modulator) simply by selecting the driving bias.
Article
Biochemistry & Molecular Biology
Ioanna Christodoulou, Pengbo Lyu, Carla Vieira Soares, Gilles Patriarche, Christian Serre, Guillaume Maurin, Ruxandra Gref
Summary: Metal-organic frameworks (MOFs) have gained interest in biomedical applications, with the mesoporous iron(III) carboxylate MIL-100(Fe) being one of the most studied MOF nanocarriers. Nanosized MIL-100(Fe) particles coordinate with drugs to achieve high drug loading and controlled release. A study investigated the interactions between the anticancer drug prednisolone and nanoMOFs, showing that prednisolone with phosphate groups had the strongest interactions and slowed down degradation, while prednisolone with sulfate groups had lower efficiencies and easily released in phosphate media. The nanoMOFs maintained their structure even after drug loading and degradation. Scanning electron microscopy and X-Ray energy-dispersive spectrometry were used to analyze the structural evolution.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Romain Coustel, Anthony Boucly, Erwan Andre, Arnaud Di Bitetto, Fabrice Bournel, Jean-Jacques Gallet, Francois Rochet, Cedric Carteret
Summary: The hydration behavior of [Mg2Al(OH)6]+[Cl-, yH2O] layered double hydroxide (LDH) was investigated using various techniques. It was found that Near Ambient Pressure X-ray Photoelectron Spectroscopy (NAP-XPS) can accurately quantify the water uptake into the interlayer region. The electronic structure of LDH changed with increasing relative humidity (RH), with the splitting of Cl 3p orbitals induced by the H-bonds between chloride and water. At RH = 0.7, LDH was covered by a water film containing Mg and Cl species but no Al species. The radiolysis of hydrated Cl species led to the formation of oxidized Cl species.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Audrey Gilbert, Michel Ramonda, Laurent Cerutti, Charles Cornet, Gilles Patriarche, Eric Tournie, Jean-baptiste Rodriguez
Summary: This study focuses on the control of antiphase domain formation and evolution in III-V semiconductor epitaxial growth on a low-miscut Si (001) substrate. The crystal polarity of thin GaAs epilayers grown through molecular-beam epitaxy is determined by the Si surface topology, resulting in a quasi-periodic 1D pattern of antiphase domains in the GaAs layer. The study also demonstrates how this configuration breaks the symmetry between different III-V phases, leading to early burying of antiphase domains in GaAs epitaxially grown on a low-miscut Si substrate.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Tung Huu Dang, Claire Abadie, Audrey Chu, Mariarosa Cavallo, Adrien Khalili, Corentin Dabard, Erwan Bossavit, Huichen Zhang, Yoann Prado, Debora Pierucci, James K. Utterback, Yanko Todorov, Carlo Sirtori, Julien Jaeck, Gregory Vincent, Angela Vasanelli, Baptiste Fix, Emmanuel Lhuillier
Summary: The coupling of a photonic structure to a nanocrystal film allows for remote light focusing compatible with the charge diffusion length. This strategy has been applied in infrared sensors to enhance absorption. Additionally, the photonic structure can be used to generate a bias-reconfigurable photoresponse, achieving on/off control of spectral response through applied bias. The resonator geometry shows promise for integration at the focal plane array level, even for small pixel sizes.
Article
Chemistry, Physical
Corentin Dabard, Erwan Bossavit, Tung Huu Dang, Nicolas Ledos, Mariarosa Cavallo, Adrien Khalili, Huichen Zhang, Rodolphe Alchaar, Gilles Patriarche, Angela Vasanelli, Benjamin T. Diroll, Aloyse Degiron, Emmanuel Lhuillier, Sandrine Ithurria
Summary: In the visible range, 2D nanoplatelets (NPLs) have advantages such as anisotropic emission, narrower photoluminescence (PL) signal, and design flexibility in heterostructures. However, there is limited research on cadmium chalcogenide NPLs in the infrared range. This study focuses on stabilizing the PL of 2D HgTe NPLs through surface chemistry and demonstrates important steps towards bright infrared light emitting diodes (LEDs), including coupling to a plasmonic grating and achieving electroluminescence at 1300 nm, near telecom wavelength.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Geoffroy Kremer, Aymen Mahmoudi, Meryem Bouaziz, Cleophanie Brochard-Richard, Lama Khalil, Debora Pierucci, Francois Bertran, Patrick Le Fevre, Mathieu G. Silly, Julien Chaste, Fabrice Oehler, Marco Pala, Federico Bisti, Abdelkarim Ouerghi
Summary: Metal monochalcogenides, such as InTe, exhibit diverse electronic properties based on their chemical composition, layer numbers, and stacking order. This study combined angle-resolved photoemission spectroscopy and density functional theory calculations to reveal the stability and properties of InTe. It was found that InTe has a tetragonal crystal structure, semiconducting behavior, and intrinsic p-type doping. The electronic band structure of InTe was highly anisotropic, with a large effective mass and in-plane anisotropy, making it interesting for electronic and thermoelectric applications.
PHYSICAL REVIEW MATERIALS
(2023)
