
Jun Min SuhMassachusetts Institute of Technology | MIT · Department of Mechanical Engineering
Jun Min Suh
Doctor of Philosophy
About
96
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Introduction
Jun Min Suh currently works at the Department of Mechanical Engineering, Massachusetts Institute of Technology.
For detailed information, please visit https://sites.google.com/view/junminsuh/
Skills and Expertise
Additional affiliations
Education
September 2014 - August 2020
March 2009 - August 2014
Publications
Publications (96)
The utilization of p-p isotype heterojunctions is an effective strategy to enhance the gas sensing properties of metal–oxide semiconductors, but most previous studies focused on p-n heterojunctions owing to their simple mechanism of formation of depletion layers. However, a proper choice of isotype semiconductors with appropriate energy bands can a...
One of the well-known pathways toward low power consuming chemoresistive gas sensors is the utilization of 2-dimensional materials. Especially, transition metal dichalcogenides (TMDs), which are usually atomically thin semiconductors, have a notable characteristic of their highly reactive edge sites. The edge sites of TMDs having high d-orbital ele...
For the last several years, indoor air quality monitoring has been a significant issue due to the increasing time portion of indoor human activities. Especially, the early detection of volatile organic compounds potentially harmful to the human body by the prolonged exposure is the primary concern for public human health, and such technology is imp...
Recent advances in flexible and stretchable electronics have led to a surge of electronic skin (e-skin)-based health monitoring platforms. Conventional wireless e-skins rely on rigid integrated circuit chips that compromise the overall flexibility and consume considerable power. Chip-less wireless e-skins based on inductor-capacitor resonators are...
Although various fabrication methods for metal–oxide nanostructures have been well developed for enlarged surface area, numerous efforts to further enhance the effective surface area for their chemical sensor applications are still being studied. Herein, a high‐power laser is irradiated on the existing metal–oxide nanostructures to expose the hidde...
The demand for the three-dimensional (3D) integration of electronic components is steadily increasing. Despite substantial processing challenges, the through-silicon-via (TSV) technique emerges as the only viable method for integrating single-crystalline device components in a 3D format1,2. Although monolithic 3D (M3D) integration schemes show prom...
Micro-light-emitting diodes (μLEDs) have gained significant interest as an activation source for gas sensors owing to their advantages, including room temperature operation and low power consumption. However, despite these benefits, challenges still exist such as a limited range of detectable gases and slow response. In this study, we present a blu...
The increasing importance of high‐purity isopropyl alcohol (IPA) in semiconductor processing technology has led to a higher demand for technologies capable of detecting impurities in IPA. Although accurate and various impurity detection technologies have been developed, most of them have limitations in real‐time and repeatable detection of impuriti...
In this study, we propose the (PEA)2MA3Pb4I13, a quasi-two-dimensional (2D) halide perovskite, in the realm of resistive switching memory devices. A quasi-2D perovskite film (PEA)2MA3Pb4I13, with a thickness measuring 450 nm, has been effectively fabricated on a silicon substrate coated with platinum through an all-solution process conducted at low...
The primary challenge facing silicon-based electronics, crucial for modern technological progress, is difficulty in dimensional scaling. This stems from a severe deterioration of transistor performance due to carrier scattering when silicon thickness is reduced below a few nanometres. Atomically thin two-dimensional (2D) semiconductors still mainta...
The development of hydrogen (H2) gas sensors is essential for the safe and efficient adoption of H2 gas as a clean, renewable energy source in the challenges against climate change, given its flammability and associated safety risks. Among various H2 sensors, gasochromic sensors have attracted great interest due to their highly intuitive and low po...
Recent studies of electronic nose system tend to waste significant amount of important data in odor identification. Until now, the sensitivity-oriented data composition has made it difficult to discover meaningful data to apply artificial intelligence in terms of in-depth analysis for odor attributes specifying the identities of gas molecules, ulti...
In this study, we propose the (PEA)2MA3Pb4I13, a quasi-two-dimensional (2D) halide perovskite, in the realm of resistive switching memory devices. A quasi-2D perovskite film (PEA)2MA3Pb4I13, with a thickness measuring 450 nm, has been effectively fabricated on a silicon substrate coated with platinum through an all-solution process conducted at low...
Supplementary Information for: Monolithic 3D integration of 2D materials-based electronics towards ultimate edge computing solutions.
Three-dimensional (3D) hetero-integration technology is poised to revolutionize the field of electronics by stacking functional layers vertically, thereby creating novel 3D circuity architectures with high integration density and unparalleled multifunctionality. However, the conventional 3D integration technique involves complex wafer processing an...
The concept of remote epitaxy involves a two-dimensional van der Waals layer covering the substrate surface, which still enable adatoms to follow the atomic motif of the underlying substrate. The mode of growth must be carefully defined as defects, e.g., pinholes, in two-dimensional materials can allow direct epitaxy from the substrate, which, in c...
Layer transfer techniques have been extensively explored for semiconductor device fabrication as a path to reduce costs and to form heterogeneously integrated devices. These techniques entail isolating epitaxial layers from an expensive donor wafer to form freestanding membranes. However, current layer transfer processes are still low-throughput an...
Noble metal nanoparticle decoration is a representative strategy to enhance selectivity for fabricating chemical sensor arrays based on the 2-dimensional (2D) semiconductor material, represented by molybdenum disulfide (MoS2). However, the mechanism of selectivity tuning by noble metal decoration on 2D materials has not been fully elucidated. Here,...
Micro-LEDs (µLEDs) have been explored for augmented and virtual reality display applications that require extremely high pixels per inch and luminance1,2. However, conventional manufacturing processes based on the lateral assembly of red, green and blue (RGB) µLEDs have limitations in enhancing pixel density3–6. Recent demonstrations of vertical µL...
The development of new heterostructures with high photoactivity is a breakthrough for the limitation of solar‐driven water splitting. Here, we first introduce indium oxide (In2O3) nanorods (NRs) as a novel electron transport layer for bismuth vanadate (BiVO4) with a short charge diffusion length. In2O3 NRs reinforce the electron transport and hole...
Recently reported studies of electronic nose systems that combine chemiresistive gas sensors with computational analysis technologies tend to waste significant amount of important data. Since the sensitivity-oriented data composition have made it difficult to discover meaningful and valuable data to apply artificial intelligence analysis in terms o...
Supplementary Information for:
Non-epitaxial single-crystal 2D material growth by geometric confinement.
DOI: 10.1038/s41586-022-05524-0
Two-dimensional (2D) materials and their heterostructures show a promising path for next-generation electronics1–3. Nevertheless, 2D-based electronics have not been commercialized, owing mainly to three critical challenges: i) precise kinetic control of layer-by-layer 2D material growth, ii) maintaining a single domain during the growth, and iii) w...
The heterostructure between two-dimensional (2D) metal sulfides and metal oxides is one of the effective strategies to enhance the gas sensing performance owing to their unique electronic properties at the interfaces. In this study, we focus on enhancing gas sensing response under highly humid conditions using 2D tin sulfides (SnS and SnS2)–SnO2 he...
Heterogeneous integration of single-crystal materials offers great opportunities for advanced device platforms and functional systems¹. Although substantial efforts have been made to co-integrate active device layers by heteroepitaxy, the mismatch in lattice polarity and lattice constants has been limiting the quality of the grown materials². Layer...
Cross‐point arrays of analog synaptic devices are expected to realize neuromorphic computing hardware for neural network computations with compelling speed boost and superior energy efficiency, as opposed to the conventional hardware based on the von Neumann architecture. To achieve desired characteristics of analog synaptic devices for fully paral...
Artificial intelligence applications have changed the landscape of computer design, driving a search for hardware architecture that can efficiently process large amounts of data. Three-dimensional heterogeneous integration with advanced packaging technologies could be used to improve data bandwidth among sensors, memory and processors. However, suc...
For the safe use of H2 gas, an eco-friendly energy source in the spotlight but highly explosive at the same time, the need for gas sensors for early H2 detection has been highly increasing. Although promising H2 sensors have been developed with different sensor principles, most of them accompany bulky and large measurement systems which limit their...
Freestanding single-crystalline membranes are an important building block for functional electronics. Especially, compounds semiconductor membranes such as III-N and III-V offer great opportunities for optoelectronics, high-power electronics, and high-speed computing. Despite huge efforts to produce such membranes by detaching epitaxial layers from...
Artificial Adaptive and Maladaptive Sensory Receptors In article number 2103484, Chong‐Yun Kang, Jung Ho Yoon, and co‐workers implement artificial adaptive and maladaptive sensory receptors using a diffusive memristor as a biological counterpart of the somatosensory system in all vertebrates. A new class of artificial receptor underlying surfacedom...
In the pandemic era, the development of high‐performance indoor air quality monitoring sensors has become more critical than ever. NO2 is one of the most toxic gases in daily life, which induces severe respiratory diseases. Thus, the real‐time monitoring of low concentrations of NO2 is highly required. Herein, a visible light‐driven ultrasensitive...
Direct consideration for both, the catalytically active species and the host materials provides highly efficient strategies for the architecture design of nanostructured catalysts. The conventional wet chemical methods have limitations in achieving such unique layer-by-layer design possessing one body framework with many catalyst parts. Herein, an...
Two-dimensional MoS 2 film can grow on oxide substrates including Al 2 O 3 and SiO 2 . However, it cannot grow usually on non-oxide substrates such as a bare Si wafer using chemical vapor deposition. To address this issue, we prepared as-synthesized and transferred MoS 2 (AS-MoS 2 and TR-MoS 2 ) films on SiO 2 /Si substrates and studied the effect...
A biological receptor serves as sensory transduction from an external stimulus to an electrical signal. It allows humans to better match the environment by filtering out repetitive innocuous information and recognize potentially damaging stimuli through key features, including adaptive and maladaptive behaviors. Herein, for the first time, the auth...
Halide perovskites, fascinating memristive materials owing to mixed ionic-electronic conductivity, have been attracting great attention as artificial synapses recently. However, polycrystalline nature in thin film form and instability under ambient air hamper them to be implemented in demonstrating reliable neuromorphic devices. Here, we successful...
So far, it has been difficult to fabricate thin‐film field‐effect transistors (TFTs) based on inorganic halide perovskites (IHPs) due to their phase‐instability and uncontrollable trap density. Here, the bottom‐gate bottom‐contact structured p‐type TFTs are presented using the optimized IHP in the active layer. The stable cubic‐CsPbI3 phase is succ...
Direct consideration for both, the catalytically active species and the host materials provides highly efficient strategies for the architecture design of nanostructured catalysts. The conventional wet chemical methods have limitations in achieving such unique layer-by-layer design possessing one body framework with many catalyst parts. Herein, an...
Electronic skins (e-skins)—electronic sensors mechanically compliant to human skin—have long been developed as an ideal electronic platform for noninvasive human health monitoring. For reliable physical health monitoring, the interface between the e-skin and human skin must be conformal and intact consistently. However, conventional e-skins cannot...
The detection of ions and molecules in liquids has been receiving considerable attention for the realization of the electronic tongue. Solution-gated field-effect transistors (SFETs) with high sensitivity are useful for detecting ions and molecules by reading electrical transconductance. However, to date, ionic and molecular sensors that employ SFE...
Transferable 2-dimensional (2D) MoS2 thin films have a versatile potential for constructing highly efficient photoelectrodes when combined with conventional semiconductor light absorbers, taking advantage of its optical transparency and high electrochemical activity. Here, we firstly report fully vertically aligned MoS2 (VMS)/p-Si heterostructure p...
To take advantage of nanostructures beyond their large surface area for light‐activated gas sensing, in article number 2001883, Seokwoo Jeon, Young‐Seok Shim, Ho Won Jang, and co‐workers introduce a new class of UV‐activated sensing of rationally designed highly periodic 3D TiO2. The 3D TiO2 facilitates 55 times enhanced light absorption and ultra‐...
The enriched edge sites of SnS 2 NFs substantially improve the gas sensing properties under visible light illumination.
The performance of halide perovskite-based electronic and optoelectronic devices is often related to interfacial charge transport. To shed light on the underlying physical and chemical properties of CH 3 NH 3 PbI 3 (MAPbI 3 ) in...
The light-activated gas sensors have been investigated for their superior potential to replace current thermally-activated gas sensors which have several drawbacks for the Internet of Everything application. This review summarizes various efforts on the development of the light-activated gas sensors and provides an overview of the progress of them....
One of the well‐known strategies for achieving high‐performance light‐activated gas sensors is to design a nanostructure for effective surface responses with its geometric advances. However, no study has gone beyond the benefits of the large surface area and provided fundamental strategies to offer a rational structure for increasing their optical...
Resistive random-access memory (ReRAM) devices based on halide perovskites have recently emerged as a new class of data storage devices, where the switching materials used in these devices have attracted extensive attention in recent years. Thus far, three-dimensional (3D) halide perovskites have been the most investigated materials for resistive s...
Since the industries are vastly rising, the threat of toxic and hazardous substance to human beings and demands of the accurate sensor is increasing. Colorimetric sensors that detect substances by measuring the absorbance or fluorescence spectra shift are one of the most emerging strategies these days. However, conventional colorimetric gas sensors...
Owing to their high theoretical capacity and reliable operational safety, non-aqueous rechargeable aluminum batteries (RABs) have emerged as a promising class of battery materials and been intensively studied in recent years; however, a lack of suitable, high-performing positive electrode materials, along with the need for air-sensitive and expensi...
Palladium (Pd) has been the key element for several carbon–carbon bond forming reactions, especially the Nobel acclaimed, Suzuki, Heck, and Sonogashira cross–coupling reactions, among others. This review article describes the recent efforts towards the synthetic strategies, characterization and development of various nanostructured material support...
Formation of heterojunctions with other light absorbing semiconductors is one of the attractive approaches to realize efficient silicon-based solar water splitting. As one of the promising candidates for heterojunction with silicon, InAs compound semiconductor has two major advantages of narrow bandgap and high electron mobility. However, the integ...
Up until now, two-dimensional (2D) materials have been researched vigorously for application to sensing ions and molecules in liquid due to their unique structural, chemical, and electronic properties. Features of 2D materials such as high surface area-to-volume ratios and various reaction sites are ideal characteristics for fabricating state-of-th...
There have been ever‐growing demands to develop advanced electrocatalysts for renewable energy conversion over the past decade. As a promising platform for advanced electrocatalysts, reduced graphene oxide (rGO) has attracted substantial research interests in a variety of electrochemical energy conversion reactions. Its versatile utility is mainly...
In article number 1902065, Chong‐Yun Kang and co‐workers demonstrate ionic‐activated chemiresistive gas sensors for room temperature operation. The proposed ionic‐activated mechanism enables surprisingly ideal gas sensing with high response and fast recovery for NO2 detection and pioneers a new path for room temperature gas sensors.
In article number 1800492 by Mohammadreza Shokouhimehr, Ho Won Jang, and co‐workers, the recent achievements in catalytic reaction of single‐atom catalysts (SAC) supported on 2D materials are summarized. Particularly, the roles of introduced 2D materials as supporting layers in enhancing the electrochemical performance of various catalytic reaction...
The development of high performance gas sensors that operate at room temperature has attracted considerable attention. Unfortunately, the conventional mechanism of chemiresistive sensors is restricted at room temperature by insufficient reaction energy with target molecules. Herein, novel strategy for room temperature gas sensors is reported using...
Two-dimensional (2D) MoS2 nanosheets (NSs) modified 1D TiO2 nanorods/0D CdS nanocrystals (NCs) heterojunction has been fabricated by all solution process as a potential anode for photoelectrochemical (PEC) water splitting applications. This heterojunction photoanode shows high photocurrent density of 3.25 mA/cm² at 0.9 V vs. RHE (0 V vs. Ag/AgCl) c...
Transition metal dichalcogenides (TMDs) have attracted enormous attention on diverse research fields. Especially, gas sensors are considered as a promising application exploiting TMDs. However, the studies are confined to only major TMDs such as MoS2, and WS2. Particularly, the chemoresistive sensing properties of two-dimensional (2D) NbS2 have nev...
Multilayered ceramic capacitor (MLCC) is a key component and a number of MLCCs are contained in electronic equipment, such as smartphones, portable PC and electric vehicles. As MLCCs distribute and control the amount of current flowing through circuits, remove noise, and prevent malfunction, MLCCs play a key role in enabling electronic devices to h...