Article
Chemistry, Multidisciplinary
Daniele Capista, Luca Lozzi, Aniello Pelella, Antonio Di Bartolomeo, Filippo Giubileo, Maurizio Passacantando
Summary: Photodetectors based on vertical multi-walled carbon nanotube (MWCNT) film-Si heterojunctions are successfully achieved by growing MWCNTs on n-type Si substrates covered with Si3N4 layers. Spatially resolved photocurrent measurements demonstrate that higher photo detection is achieved in regions with thinner MWCNT film, resulting in nearly 100% external quantum efficiency. Therefore, a simple method utilizing scotch tape is proposed to tune the thickness and density of the as-grown MWCNT film, thereby enhancing the device photo-response.
Article
Chemistry, Analytical
Nanxin Fu, Jiazhen Zhang, Yuan He, Xuyang Lv, Shuguang Guo, Xingjun Wang, Bin Zhao, Gang Chen, Lin Wang
Summary: This study prepared a photodetector based on a hybrid dimensional heterostructure of multiwall carbon nanotubes (MWCNTs) and multilayered MoS2. With the high mobility of carbon nanotubes and efficient interband absorption of MoS2, broadband detection from visible to near-infrared was achieved. The device exhibited exceptional responsivity, detectivity, and external quantum efficiency, providing a new option for optoelectronic devices based on low-dimensional materials.
Article
Materials Science, Multidisciplinary
Maral Vafaie, James Z. Fan, Amin Morteza Najarian, Olivier Ouellette, Laxmi Kishore Sagar, Koen Bertens, Bin Sun, F. Pelayo Garcia de Arquer, Edward H. Sargent
Summary: Efficient ligand exchange route enables large-diameter CQDs to achieve high-efficiency passivation and charge transport, leading to CQD solids with external quantum efficiency greater than 80% at 1,550 nm. This technology has the potential to replace conventional III-V semiconductors and make significant advancements in the field of infrared photodetection.
Review
Materials Science, Multidisciplinary
Mao-Kun Zhang, Wei-Di Liu, You-Pin Gong, Qingfeng Liu, Zhi-Gang Chen
Summary: Graphene is an ideal material for photodetection due to its high carrier mobility and stability, but its weak light absorption hinders its practical applications. To overcome this limitation, quantum dots are hybridized with graphene to achieve wide-range and intense light absorption. In this paper, the significance, synthesis methods, and performance engineering strategies of graphene/quantum dot heterostructure photodetectors are systematically discussed.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Aiping Cao, Shubing Li, Hongli Chen, Menghan Deng, Xionghu Xu, Liyan Shang, Yawei Li, Anyang Cui, Zhigao Hu
Summary: Anomalous negative phototransistors, characterized by a decrease in channel current under light illumination, have emerged as a distinct research area. Recently, their potential applications have been expanded beyond photodetection. However, research advancements in negative photoconductance (NPC) remain limited compared to positive phototransistors.
MATERIALS HORIZONS
(2023)
Article
Optics
Feng Xie, Yan Gu, Zhijia Hu, Benli Yu, Guofeng Yang
Summary: A high-performance back-illuminated solar-blind ultraviolet photodetector with ultra-low dark current, broad spectral response, and fast response speed has been fabricated in this study.
Article
Chemistry, Multidisciplinary
Aihua Zhong, Yue Zhou, Hao Jin, Huimin Yu, Yunkai Wang, Jingting Luo, Longbiao Huang, Zhenhua Sun, Dongping Zhang, Ping Fan
Summary: This study demonstrates self-driven NIR photodetectors based on SnTe/Si and SnTe:Si/Si heterostructures. Si doping reduces dark current density and increases photocurrent by approximately one order of magnitude, improving the detectivity D* by approximately two orders of magnitude. The improved performance may be attributed to the bulk photovoltaic effect (BPVE) enabled by the doped Si atoms.
Article
Multidisciplinary Sciences
Ji Hao, Young-Hoon Kim, Severin N. Habisreutinger, Steven P. Harvey, Elisa M. Miller, Sean M. Foradori, Michael S. Arnold, Zhaoning Song, Yanfa Yan, Joseph M. Luther, Jeffrey L. Blackburn
Summary: The study demonstrates a new method for optical memory and brain-inspired neuromorphic information processing, utilizing versatile heterojunctions between metal-halide perovskite nanocrystals and semiconducting single-walled carbon nanotubes to achieve long-lived, writable, and erasable persistent photoconductivity. This approach enables optical switching and basic neuromorphic functions at low energy consumption levels.
Article
Nanoscience & Nanotechnology
Boyao Cui, Yanhui Xing, Keyan Niu, Jun Han, Haixin Ma, Weiming Lv, Ting Lei, Binghui Wang, Zhongming Zeng
Summary: In this study, photodetectors based on InSe and MLG/InSe van der Waals heterostructure were fabricated. It was found that the MLG/InSe photodetector exhibited negative photoconductivity behavior, achieving ultra-high responsivity, external quantum efficiency, and fast response time. The proposed MLG/InSe heterostructure photodetector based on NPC may have broad applications in future optoelectronic devices.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2022)
Article
Materials Science, Multidisciplinary
Taehyun Park, Daekwan Kim, Bongguen Shin, Jaehyun Hur, Hocheon Yoo
Summary: A rapid and efficient opto-electrical method for determining blood components using a tin oxide quantum dot fluorene copolymer heterojunction photodetector is demonstrated. The device shows remarkable responsivity, detectability, fast responses, and stability under self-powered operation. This technique provides a simple and efficient approach for emergency medical care and health monitoring systems.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Raphael Schwanninger, Stefan M. Koepfli, Olesya Yarema, Alexander Dorodnyy, Maksym Yarema, Annina Moser, Shadi Nashashibi, Yuriy Fedoryshyn, Vanessa Wood, Juerg Leuthold
Summary: We demonstrate compact and efficient photodetectors operating at room temperature in a wavelength range of 2710-4250 nm with high responsivities of 375 and 4 A/W. The key to their high performance is the combination of a sintered colloidal quantum dot (CQD) heterojunction photoconductor and a metallic metasurface perfect absorber. The combination results in a 20-fold increase in responsivity compared to reference photoconductors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Bilal Chehaibou, Eva Izquierdo, Audrey Chu, Claire Abadie, Mariarosa Cavallo, Adrien Khalili, Tung Huu Dang, Charlie Greboval, Xiang Zhen Xu, Sandrine Ithurria, Gregory Vincent, Bruno Gallas, Gabriel Mugny, Arthur Arnaud, Emmanuel Lhuillier, Christophe Delerue
Summary: The complex optical index of PbS nanocrystal thin films is systematically investigated using broadband spectrally resolved ellipsometry. The results are compared with simulations and used to model the absorption in short-wave infrared diode stacks based on PbS nanocrystals, revealing a major limitation in the current devices.
Article
Chemistry, Physical
Biplab Bhattacharyya, Alka Sharma, Mandeep Kaur, B. P. Singh, Sudhir Husale
Summary: Topological insulators represent a new electronic phase with promising potential in various applications. Combining TIs with carbon-based nanomaterials offers a novel and promising technique for photodetection. Experimental results show efficient light absorption and electron hole pair generation in a photodetector based on a hybrid of TIs and carbon nanotubes under visible and near infrared illumination.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Sheng Zhu, Lingtong Ding, Xuehuan Zhang, Kun Wang, Xiao Wang, Feng Yang, Gaoyi Han
Summary: A novel one-dimensional heterostructured ORR catalyst, FePc-{PW12}@NTs, was fabricated through the host-guest self-assembly of FePc and polyoxometalate-encapsulated carbon nanotubes. The heterostructure exhibits enhanced ORR catalytic performance due to the strain and curvature effects of {PW12}@NT scaffold, which tune the geometric structure and electronic localization of FeN4 centers. The FePc-{PW12}@NT electrocatalyst demonstrates excellent durability, methanol tolerance, and ORR activity in alkaline medium, surpassing the performance of the commercial Pt/C+IrO2 cathode.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Wei Li, Shaoyuan Zhou, Xiaolu Xia, Ying Wang, Kaixuan Yang, Tong Hao, XinYue Zhang, Qi Yang, Zhenyu Ni, Jianhua Jiang, Jia Si, Fujun Zhang, Zhiyong Zhang
Summary: Controllable negative photoconductance (NPC) detectors based on organic-gated carbon nanotube field-effect transistors (OG-CNT FETs) are reported, with the strong influence of light-induced electrostatic doping on the nonconventional photoresponse demonstrated. The optimized OG-CNT FETs exhibit high responsivity of 72.6 A W-1 at 880 nm, along with improved response/recovery times of 7 and 5 ms. Reversible switching between NPC and positive photoconductance (PPC) is observed under the same light illumination, offering a new approach for achieving bidirectional photoresponses and paving the way for multifunctional optoelectronic systems.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Arun Kumar, Loredana Viscardi, Enver Faella, Filippo Giubileo, Kimberly Intonti, Aniello Pelella, Stephan Sleziona, Osamah Kharsah, Marika Schleberger, Antonio Di Bartolomeo
Summary: We present the fabrication, electrical, and optical characteristics of few-layered black phosphorus-based Field-Effect Transistor (FET). The device exhibits p-type transport with high hole mobility and a large hysteresis width that decreases with increasing drain bias. The device also demonstrates non-volatile charge-trap memory behavior and efficient photodetection capabilities. As a photodetector, the transistor shows high responsivity and detectivity under white light.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Somayeh Tajik, Fatemeh Sharifi, Behnaz Aflatoonian, Antonio Di Bartolomeo
Summary: This article introduces an ultrasensitive and selective voltammetric sensor for the determination of ketoconazole (KTC) in real samples. It utilizes a modified carbon paste electrode with a sheaf-like Ce-BTC MOF nanostructure and ionic liquid. The electrode exhibits excellent electrocatalytic activity for KTC oxidation, with a detection limit of 0.04 μM and a sensitivity of 0.1342 μA·μM-1. It can effectively monitor KTC in aqueous samples.
Article
Nanoscience & Nanotechnology
Aniello Pelella, Daniele Capista, Maurizio Passacantando, Enver Faella, Alessandro Grillo, Filippo Giubileo, Nadia Martucciello, Antonio Di Bartolomeo
Summary: In this study, a photodetector with bias-tuneable current is achieved by adding a CNT/Si3N4/Si capacitor to a prefabricated metal-insulator-semiconductor diode. The device exhibits high photoresponsivity and external quantum efficiency, and can be used as an optoelectronic Boolean logic device. It also possesses the capability of self-powering.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Filippo Giubileo, Daniele Capista, Enver Faella, Aniello Pelella, Woo Young Kim, Paola Benassi, Maurizio Passacantando, Antonio Di Bartolomeo
Summary: This experimental study investigates the field emission properties of commercially available graphene flowers cloth. Material characterization confirms the formation of high-quality vertical few-layers graphene nanosheets. The results demonstrate a low turn-on field and a high field enhancement factor in a small cathode-anode separation distance range. The study also shows that the turn-on field increases with distance while the field enhancement factor decreases. Additionally, the time stability of the field emission current is reported.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Serena Pilato, Samanta Moffa, Gabriella Siani, Francesca Diomede, Oriana Trubiani, Jacopo Pizzicannella, Daniele Capista, Maurizio Passacantando, Paolo Samori, Antonella Fontana
Summary: The development of novel three-dimensional (3D) nanomaterials with high biocompatibility, precise mechanical characteristics, electrical conductivity, and controlled pore size is highly sought after for cardiac tissue engineering applications. Hybrid, highly porous tridimensional scaffolds based on chemically functionalized graphene oxide (GO) can provide these unique characteristics and be manufactured using the layer-by-layer technique.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Editorial Material
Multidisciplinary Sciences
Francesco Romeo, Antonio Di Bartolomeo
Summary: Topological electronics, a growing field that utilizes the topological properties of matter to create devices with extended functionalities, has recently seen the development of a topological current divider, a key circuit element in this emerging technology.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Analytical
Mohammad Bagher Askari, Parisa Salarizadeh, Payam Veisi, Elham Samiei, Homa Saeidfirozeh, Mohammad Taghi Tourchi Moghadam, Antonio Di Bartolomeo
Summary: The advent of new nanomaterials has led to significant advancements in energy production and storage. Transition metal dichalcogenides (TMDs), with their unique structure and properties, have emerged as the most promising materials in this field. Recent research on TMD-based catalysts and electrode materials have shown remarkable progress in their applications in electrochemical batteries and solar cells, with a particular focus on MoS2 as the most extensively studied and utilized TMD material.
Article
Chemistry, Multidisciplinary
Mohammad Bagher Askari, Hadi Beitollahi, Antonio Di Bartolomeo
Summary: Recently, the synthesis of a three-component catalyst consisting of zirconium oxide (ZrO2), nickel oxide (NiO), and reduced graphene oxide (rGO) in the form of ZrO2/NiO/rGO has been achieved by a simple one-step hydrothermal method. The catalyst exhibited excellent methanol and ethanol electrooxidation abilities with high current densities and cyclic stabilities, making it an attractive option for anode materials in alcoholic fuel cells. The detailed characterization and electrochemical tests demonstrate the outstanding capability of this new nanocatalyst.
Article
Chemistry, Multidisciplinary
Daniele Capista, Luca Lozzi, Aniello Pelella, Antonio Di Bartolomeo, Filippo Giubileo, Maurizio Passacantando
Summary: Photodetectors based on vertical multi-walled carbon nanotube (MWCNT) film-Si heterojunctions are successfully achieved by growing MWCNTs on n-type Si substrates covered with Si3N4 layers. Spatially resolved photocurrent measurements demonstrate that higher photo detection is achieved in regions with thinner MWCNT film, resulting in nearly 100% external quantum efficiency. Therefore, a simple method utilizing scotch tape is proposed to tune the thickness and density of the as-grown MWCNT film, thereby enhancing the device photo-response.
Article
Nanoscience & Nanotechnology
Kimberly Intonti, Enver Faella, Loredana Viscardi, Arun Kumar, Ofelia Durante, Filippo Giubileo, Maurizio Passacantando, Hoi Tung Lam, Konstantinos Anastasiou, Monica F. Craciun, Saverio Russo, Antonio Di Bartolomeo
Summary: This study reports the optoelectronic characterization of few-layer ReSe2 field effect transistors at different pressures. The devices exhibit a dominant n-type behavior with low Schottky barrier and significant hysteresis. The conductance and mobility of the devices are affected by air pressure, increasing with lower pressure due to the desorption of electronegative air molecules. The photoresponse of the device changes from positive photoconductivity at higher pressure to negative photoconductivity at lower pressure, which can be explained by the desorption of molecules and the defect trapping of photogenerated carriers.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
A. Di Bartolomeo, A. Kumar, O. Durante, A. Sessa, E. Faella, L. Viscardi, K. Intonti, F. Giubileo, N. Martucciello, P. Romano, S. Sleziona, M. Schleberger
Summary: The photoconductivity of monolayer MoS2 back-gate transistors is investigated with respect to temperature and pressure. The photocurrent shows linear increase with light intensity, reaching a maximum responsivity of approximately 30 A/W in air. The photocurrent enhancement is observed at elevated temperatures and reduced pressures, which can be attributed to the desorption of adsorbates such as O2 and H2O molecules, leading to an increase in the n-doping level and channel current.
MATERIALS TODAY NANO
(2023)
Article
Nanoscience & Nanotechnology
Serena Pilato, Samanta Moffa, Gabriella Siani, Francesca Diomede, Oriana Trubiani, Jacopo Pizzicannella, Daniele Capista, Maurizio Passacantando, Paolo Samori, Antonella Fontana
Summary: The development of 3D nanomaterials with high biocompatibility, precise mechanical characteristics, electrical conductivity, and controlled pore size is crucial for cardiac tissue engineering applications. Hybrid, highly porous tridimensional scaffolds based on chemically functionalized graphene oxide (GO) offer enhanced compositional and structural control. These scaffolds are biocompatible, promote cell adhesion and growth without interfering with cell morphology and cardiac markers, and can be used for repairing damaged heart tissues and cardiac modeling investigations.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Stephan Sleziona, Aniello Pelella, Enver Faella, Osamah Kharsah, Lucia Skopinski, Andre Maas, Yossarian Liebsch, Jennifer Schmeink, Antonio Di Bartolomeo, Marika Schleberger
Summary: Field-effect transistors based on molybdenum disulfide (MoS2) were irradiated with Xe30+ ions to introduce defects and investigate their effects on electrical properties. The irradiation resulted in decreased charge carrier mobility and increased conductivity, as well as a significantly reduced n-doping and enhanced hysteresis. The irradiated MoS2 transistor exhibited memory-like behavior with remarkably longer relaxation times compared to previous works.
NANOSCALE ADVANCES
(2023)
