Oliver Hartwig
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View article: Impact of Strain in Free‐Standing PtSe <sub>2</sub> in Scalable 2D MEMS
Impact of Strain in Free‐Standing PtSe <sub>2</sub> in Scalable 2D MEMS Open
2D layered materials such as PtSe 2 are prime candidates for next‐generation micro‐ and nano‐electro–mechanical systems (MEMS/NEMS), including piezoresistive sensors. However, due to difficulties in large‐scale synthesis and the inherent d…
View article: Comprehensive benchmarking and user guide for the characterization of CVD-grown transition metal chalcogenides
Comprehensive benchmarking and user guide for the characterization of CVD-grown transition metal chalcogenides Open
Since the discovery of graphene in 2004, there has been rapid progress in research on two-dimensional (2D) material’s potential applications with significant impact. Efforts to bring 2D materials closer to industrial production, quality as…
View article: Piezoresistive Platinum Diselenide Pressure Sensors with Reliable High Sensitivity and Their Integration into Complementary Metal-Oxide-Semiconductor Circuits
Piezoresistive Platinum Diselenide Pressure Sensors with Reliable High Sensitivity and Their Integration into Complementary Metal-Oxide-Semiconductor Circuits Open
Membrane-based sensors are an important market for microelectromechanical systems (MEMS). Two-dimensional (2D) materials, with their low mass, are excellent candidates for suspended membranes to provide high sensitivity, small footprint se…
View article: Scalable Metal–Organic Chemical Vapor Deposition of High Quality PtSe<sub>2</sub>
Scalable Metal–Organic Chemical Vapor Deposition of High Quality PtSe<sub>2</sub> Open
Platinum diselenide (PtSe 2 ), a 2D noble metal dichalcogenide, has recently received significant attention due to its outstanding properties. It undergoes a semimetal to semiconductor transition when thinned, offers a bandgap in the infra…
View article: 3D Printing of Hierarchical Structures Made of Inorganic Silicon-Rich Glass Featuring Self-Forming Nanogratings
3D Printing of Hierarchical Structures Made of Inorganic Silicon-Rich Glass Featuring Self-Forming Nanogratings Open
Hierarchical structures are abundant in nature, such as in the superhydrophobic surfaces of lotus leaves and the structural coloration of butterfly wings. They consist of ordered features across multiple size scales, and their advantageous…
View article: Piezoresistive PtSe$_2$ pressure sensors with reliable high sensitivity and their integration into CMOS ASIC substrates
Piezoresistive PtSe$_2$ pressure sensors with reliable high sensitivity and their integration into CMOS ASIC substrates Open
Membrane-based sensors are an important market for microelectromechanical systems (MEMS). Two-dimensional (2D) materials, with their low mass, are excellent candidates for suspended membranes to provide high sensitivity, small footprint se…
View article: 3D printing of hierarchical structures made of inorganic silicon-rich glass featuring self-forming nanogratings
3D printing of hierarchical structures made of inorganic silicon-rich glass featuring self-forming nanogratings Open
Hierarchical structures are abundant in nature, such as in the superhydrophobic surfaces of lotus leaves and the structural coloration of butterfly wings. They consist of ordered features across multiple size scales, and their unique prope…
View article: Non-Volatile Resistive Switching of Polymer Residues in 2D Material Memristors
Non-Volatile Resistive Switching of Polymer Residues in 2D Material Memristors Open
Two-dimensional (2D) materials are popular candidates for emerging nanoscale devices, including memristors. Resistive switching (RS) in such 2D material memristors has been attributed to the formation and dissolution of conductive filament…
View article: Three-dimensional printing of silica glass with sub-micrometer resolution
Three-dimensional printing of silica glass with sub-micrometer resolution Open
View article: Identification of Ubiquitously Present Polymeric Adlayers on 2D Transition Metal Dichalcogenides
Identification of Ubiquitously Present Polymeric Adlayers on 2D Transition Metal Dichalcogenides Open
The interest in 2D materials continues to grow across numerous scientific disciplines as compounds with unique electrical, optical, chemical, and thermal characteristics are being discovered. All these properties are governed by an all-sur…
View article: Ultrafast and Resist-Free Nanopatterning of 2D Materials by Femtosecond Laser Irradiation
Ultrafast and Resist-Free Nanopatterning of 2D Materials by Femtosecond Laser Irradiation Open
The performance of two-dimensional (2D) materials is promising for electronic, photonic, and sensing devices since they possess large surface-to-volume ratios, high mechanical strength, and broadband light sensitivity. While significant ad…
View article: Metal-Organic Chemical Vapor Deposition of PtSe2
Metal-Organic Chemical Vapor Deposition of PtSe2 Open
Platinum diselenide (PtSe2), a novel two-dimensional material from the class of noble-metal dichalcogenide (NMD), has recently received significant attention due to its outstanding properties. PtSe2, which undergoes a semi metallic to semi…
View article: Highly conductive and long-term stable films from liquid-phase exfoliated platinum diselenide
Highly conductive and long-term stable films from liquid-phase exfoliated platinum diselenide Open
Long-term stable gas sensors by tiled networks from LPE-PtSe 2 .
View article: Non-Volatile Resistive Switching in PtSe<sub>2</sub>-Based Crosspoint Memristors
Non-Volatile Resistive Switching in PtSe<sub>2</sub>-Based Crosspoint Memristors Open
<p>Two-dimensional (2D) materials such as transition metal dichalcogenides (TMDCs) have gained attention for neuromorphic computing applications due to their resistive switching (RS) behavior [1], [2]. Among TMDCs, platinum diselenid…
View article: Stacking Polymorphism in PtSe<sub>2</sub> Drastically Affects Its Electromechanical Properties
Stacking Polymorphism in PtSe<sub>2</sub> Drastically Affects Its Electromechanical Properties Open
PtSe 2 is one of the most promising materials for the next generation of piezoresistive sensors. However, the large‐scale synthesis of homogeneous thin films with reproducible electromechanical properties is challenging due to polycrystall…
View article: Two-Dimensional Platinum Diselenide Waveguide-Integrated Infrared Photodetectors
Two-Dimensional Platinum Diselenide Waveguide-Integrated Infrared Photodetectors Open
Low cost, easily integrable photodetectors (PDs) for silicon (Si) photonics are still a bottleneck for photonic integrated circuits (PICs), especially for wavelengths above 1.8 $μ$m. Multilayered platinum diselenide (PtSe$_2$) is a semi-me…
View article: Stacking polymorphism in PtSe$_2$ drastically affects its electromechanical properties
Stacking polymorphism in PtSe$_2$ drastically affects its electromechanical properties Open
PtSe$_2$ is one of the most promising materials for the next generation of piezoresistive sensors. However, the large-scale synthesis of homogeneous thin films with reproducible electromechanical properties is challenging due to polycrysta…
View article: Two-dimensional Platinum Diselenide Waveguide-Integrated Infrared\n Photodetectors
Two-dimensional Platinum Diselenide Waveguide-Integrated Infrared\n Photodetectors Open
Low cost, easily integrable photodetectors (PDs) for silicon (Si) photonics\nare still a bottleneck for photonic integrated circuits (PICs), especially for\nwavelengths above 1.8 ${\\mu}$m. Multilayered platinum diselenide (PtSe$_2$) is\na…
View article: Hybrid Devices by Selective and Conformal Deposition of PtSe<sub>2</sub> at Low Temperatures
Hybrid Devices by Selective and Conformal Deposition of PtSe<sub>2</sub> at Low Temperatures Open
2D materials display very promising intrinsic material properties, with multiple applications in electronics, photonics, and sensing. In particular layered platinum diselenide has shown high potential due to its layer‐dependent tunable ban…
View article: Synthesis and thermal stability of TMD thin films: A comprehensive XPS and Raman study
Synthesis and thermal stability of TMD thin films: A comprehensive XPS and Raman study Open
Transition metal dichalcogenides (TMDs) have been a core constituent of 2D material research throughout the last decade. Over this time, research focus has progressively shifted from synthesis and fundamental investigations, to exploring t…
View article: Synthesis and thermal stability of TMD thin films: A comprehensive XPS\n and Raman study
Synthesis and thermal stability of TMD thin films: A comprehensive XPS\n and Raman study Open
Transition metal dichalcogenides (TMDs) have been a core constituent of 2D\nmaterial research throughout the last decade. Over this time, research focus\nhas progressively shifted from synthesis and fundamental investigations, to\nexplorin…
View article: Synthesis and characterisation of thin-film platinum disulfide and platinum sulfide
Synthesis and characterisation of thin-film platinum disulfide and platinum sulfide Open
Group-10 transition metal dichalcogenides (TMDs) are rising in prominence within the highly innovative field of 2D materials. While PtS2 has been investigated for potential electronic applications, due to its high charge-carrier mobility a…
View article: Synthesis and characterisation of thin-film platinum disulfide and\n platinum sulfide
Synthesis and characterisation of thin-film platinum disulfide and\n platinum sulfide Open
Group-10 transition metal dichalcogenides (TMDs) are rising in prominence\nwithin the highly innovative field of 2D materials. While PtS2 has been\ninvestigated for potential electronic applications, due to its high\ncharge-carrier mobilit…
View article: Large-area integration of two-dimensional materials and their heterostructures by wafer bonding
Large-area integration of two-dimensional materials and their heterostructures by wafer bonding Open
View article: Highly Selective Non‐Covalent On‐Chip Functionalization of Layered Materials
Highly Selective Non‐Covalent On‐Chip Functionalization of Layered Materials Open
Non‐covalent functionalization of layered 2D materials is an essential tool to modify and fully harness their optical, electrical, and chemical properties. Herein, a facile method enabling the selective formation of self‐assembled monolaye…
View article: Influence of defect density on the gas sensing properties of multi-layered graphene grown by chemical vapor deposition
Influence of defect density on the gas sensing properties of multi-layered graphene grown by chemical vapor deposition Open
View article: Stacking of Two-Dimensional Materials to Large-Area Heterostructures by Wafer Bonding
Stacking of Two-Dimensional Materials to Large-Area Heterostructures by Wafer Bonding Open
The integration of 2D materials for photonic applications is not compatible with high-volume manufacturing. We report a generic methodology that uses only readily available semiconductor equipment and experimentally demonstrate the stackin…
View article: Rapid and Large-Area Visualization of Grain Boundaries in MoS<sub>2</sub> on SiO<sub>2</sub> Using Vapor Hydrofluoric Acid
Rapid and Large-Area Visualization of Grain Boundaries in MoS<sub>2</sub> on SiO<sub>2</sub> Using Vapor Hydrofluoric Acid Open
Grain boundaries in two-dimensional (2D) material layers have an impact on their electrical, optoelectronic, and mechanical properties. Therefore, the availability of simple large-area characterization approaches that can directly visualiz…
View article: Spectroscopic thickness and quality metrics for PtSe$_2$ layers produced by top-down and bottom-up techniques
Spectroscopic thickness and quality metrics for PtSe$_2$ layers produced by top-down and bottom-up techniques Open
Thin films of noble-metal-based transition metal dichalcogenides, such as PtSe$_2$, have attracted increasing attention due to their interesting layer-number dependent properties and application potential. While it is difficult to cleave b…
View article: Spectroscopic thickness and quality metrics for PtSe$_2$ layers produced by top-down and bottom-up techniques
Spectroscopic thickness and quality metrics for PtSe$_2$ layers produced by top-down and bottom-up techniques Open
Thin films of noble-metal-based transition metal dichalcogenides, such as PtSe$_2$, have attracted increasing attention due to their interesting layer-number dependent properties and application potential. While it is difficult to cleave b…