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Prof. Jonghoo Park
1. Department of Electrical Engineering, Kyungpook National University, Daegu, South Korea

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0 Liquid Crystals
0 Metamaterials
0 Nanomaterials
0 Optoelectronics
0 Photonics

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2D materials and devices

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Journal article
Published: 31 March 2021 in JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY
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ACS Style

Seonmin Hong; Wooyoung Son; Hyewon Cheon; Daekyoung Kang; Jonghoo Park. Detection and localization of partial discharge in high-voltage direct current cables using a high-frequency current transformer. JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY 2021, 30, 105 -108.

AMA Style

Seonmin Hong, Wooyoung Son, Hyewon Cheon, Daekyoung Kang, Jonghoo Park. Detection and localization of partial discharge in high-voltage direct current cables using a high-frequency current transformer. JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY. 2021; 30 (2):105-108.

Chicago/Turabian Style

Seonmin Hong; Wooyoung Son; Hyewon Cheon; Daekyoung Kang; Jonghoo Park. 2021. "Detection and localization of partial discharge in high-voltage direct current cables using a high-frequency current transformer." JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY 30, no. 2: 105-108.

Journal article
Published: 19 November 2020 in Optics and Lasers in Engineering
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Despite the recent advances in correcting complex vision problems using the progressive addition lens, the narrow field of view of the lens often causes visual discomforts including dizziness and headache. The electro-optic lens technologies have shown promising potential for ophthalmic applications, but additional systems are needed to enable the time-multiplex switching of the focal power among multiple foci. Here, we demonstrate the electro-optic diffractive multifocal lens that provides multiple focal planes simultaneously by distributing the light pass through the lens to the zeroth and first-order diffraction focal planes of two LC diffractive lenses. The proposed LC diffractive lens offers six combinations of bifocal planes, nine combinations of trifocal planes, and 12 combinations of quadfocal planes that are electrically switchable without compromising the field of view when combined with a refractive lens such as a human crystalline lens. The diffractive multifocal lens technology shows promising potential for correcting ophthalmic vision problems as well as mitigating the vergence-accommodation conflict in augmented and virtual reality displays.

ACS Style

Mareddi Bharath Kumar; Daekyung Kang; Mohammad Awwal Adeshina; Soobae Kim; Taewan Kim; Jonghoo Park. Electro-optic diffractive multifocal lens with electrically reconfigurable multifocal planes. Optics and Lasers in Engineering 2020, 139, 106459 .

AMA Style

Mareddi Bharath Kumar, Daekyung Kang, Mohammad Awwal Adeshina, Soobae Kim, Taewan Kim, Jonghoo Park. Electro-optic diffractive multifocal lens with electrically reconfigurable multifocal planes. Optics and Lasers in Engineering. 2020; 139 ():106459.

Chicago/Turabian Style

Mareddi Bharath Kumar; Daekyung Kang; Mohammad Awwal Adeshina; Soobae Kim; Taewan Kim; Jonghoo Park. 2020. "Electro-optic diffractive multifocal lens with electrically reconfigurable multifocal planes." Optics and Lasers in Engineering 139, no. : 106459.

Erratum
Published: 25 June 2020 in Optics and Lasers in Engineering
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Mareddi Bharath Kumar; Daekyung Kang; Jihoon Jung; Hongsik Park; Joonku Hahn; Muhan Choi; Jin-Hyuk Bae; Hyunmin Kim; Jonghoo Park. Corrigendum to “Compact vari-focal augmented reality display based on ultrathin, polarization-insensitive, and adaptive liquid crystal lens” Opt. Lasers Eng. 128 (2020) 106006. Optics and Lasers in Engineering 2020, 139, 106284 .

AMA Style

Mareddi Bharath Kumar, Daekyung Kang, Jihoon Jung, Hongsik Park, Joonku Hahn, Muhan Choi, Jin-Hyuk Bae, Hyunmin Kim, Jonghoo Park. Corrigendum to “Compact vari-focal augmented reality display based on ultrathin, polarization-insensitive, and adaptive liquid crystal lens” Opt. Lasers Eng. 128 (2020) 106006. Optics and Lasers in Engineering. 2020; 139 ():106284.

Chicago/Turabian Style

Mareddi Bharath Kumar; Daekyung Kang; Jihoon Jung; Hongsik Park; Joonku Hahn; Muhan Choi; Jin-Hyuk Bae; Hyunmin Kim; Jonghoo Park. 2020. "Corrigendum to “Compact vari-focal augmented reality display based on ultrathin, polarization-insensitive, and adaptive liquid crystal lens” Opt. Lasers Eng. 128 (2020) 106006." Optics and Lasers in Engineering 139, no. : 106284.

Journal article
Published: 28 April 2020 in Nanomaterials
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We investigated the effect of reduced graphene oxide (rGO) doping on the birefringence of 5CB liquid crystal (LC). The characteristics of the synthesized rGO and LC-rGO composite with different rGO concentrations were analyzed by atomic force microscopy, X-ray photoelectron spectroscopy, white light polarized microscopy, voltage-dependent transmission measurement, and differential scanning calorimetry. We found that doping LC with an appropriate concentration of rGO enhances the birefringence of the LC. This is mainly due to the improved anisotropy of polarizability, which stems from the high shape anisotropy of rGO. However, the aggregation of rGO reduces the birefringence by decreasing the anisotropy of polarizability as well as the order parameter. Our study shows the promising potential of LC-rGO for developing various electro-optic devices that offer improved electro-optic effects.

ACS Style

Mareddi Bharath Kumar; Mohammad Awwal Adeshina; Daekyung Kang; Youngho Jee; Taewan Kim; Muhan Choi; Jonghoo Park. Enhancement of Birefringence in Reduced Graphene Oxide Doped Liquid Crystal. Nanomaterials 2020, 10, 842 .

AMA Style

Mareddi Bharath Kumar, Mohammad Awwal Adeshina, Daekyung Kang, Youngho Jee, Taewan Kim, Muhan Choi, Jonghoo Park. Enhancement of Birefringence in Reduced Graphene Oxide Doped Liquid Crystal. Nanomaterials. 2020; 10 (5):842.

Chicago/Turabian Style

Mareddi Bharath Kumar; Mohammad Awwal Adeshina; Daekyung Kang; Youngho Jee; Taewan Kim; Muhan Choi; Jonghoo Park. 2020. "Enhancement of Birefringence in Reduced Graphene Oxide Doped Liquid Crystal." Nanomaterials 10, no. 5: 842.

Journal article
Published: 13 January 2020 in Optics and Lasers in Engineering
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Despite the recent advances in augmented reality (AR), which has shown the potential to significantly impact on our daily lives by offering a new way to manipulate and interact with virtual information, minimizing visual discomfort due to the vergence–accommodation conflict remains a challenge. Emerging AR technologies often exploit focus-tunable optics to address this problem. Although they demonstrated improved depth perception by enabling proper focus cues, a bulky form factor of focus–tunable optics prevents their use in the form of a pair of eyeglasses. Here, we propose a novel optical configuration for a compact vari-focal AR display which deliberately utilizes the zeroth and first diffraction orders of the LC lens to produce two foci: one for a real object and the other for a virtual object with addressable focal planes. The prototype AR glasses can adjust the accommodation distance of the virtual image, mitigating the vergence–accommodation conflict without substantially compromising the form factor or image quality. In addition, we describe the design, fabrication, and characterization of an ultrathin, polarization-insensitive focus-tunable liquid crystal (LC) diffractive lens with a large aperture, a low weight, and a low operating voltage. We show that the polarization dependence of the lens, which is an inherent optical property of LC lenses, can be insensitive using the trilayer birefringent materials and by aligning the optical axes of each birefringent material at a specific angle. The polarization insensitivity eliminates the need for a polarizer, thus further reducing the form factor of the optical system. This novel approach offers significantly reduced complexity for designing AR glasses with addressable focal planes. These technologies for ultrathin lens and AR display show promising potential for developing compact optical systems in various applications.

ACS Style

Mareddi Bharath Kumar; Daekyung Kang; Jihoon Jung; Hongsik Park; Joonku Hahn; Muhan Choi; Jin-Hyuk Bae; Hyunmin Kim; Jonghoo Park. Compact vari-focal augmented reality display based on ultrathin, polarization-insensitive, and adaptive liquid crystal lens. Optics and Lasers in Engineering 2020, 128, 106006 .

AMA Style

Mareddi Bharath Kumar, Daekyung Kang, Jihoon Jung, Hongsik Park, Joonku Hahn, Muhan Choi, Jin-Hyuk Bae, Hyunmin Kim, Jonghoo Park. Compact vari-focal augmented reality display based on ultrathin, polarization-insensitive, and adaptive liquid crystal lens. Optics and Lasers in Engineering. 2020; 128 ():106006.

Chicago/Turabian Style

Mareddi Bharath Kumar; Daekyung Kang; Jihoon Jung; Hongsik Park; Joonku Hahn; Muhan Choi; Jin-Hyuk Bae; Hyunmin Kim; Jonghoo Park. 2020. "Compact vari-focal augmented reality display based on ultrathin, polarization-insensitive, and adaptive liquid crystal lens." Optics and Lasers in Engineering 128, no. : 106006.

Journal article
Published: 01 November 2019 in Applied Sciences
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Quantum dots have diverse chemical properties with different ligands attached on the surface. The cysteamine has been used as a ligand for various quantum dots because it has high solubility in water, and it facilitates binding of quantum dot and gold surface. However, the hydrogen bonds in cysteamine cause aggregation of the cysteamine capped quantum dots. In this study, we suggested a simple synthesis method of aggregation-free PbS quantum dot and analyzed the electric and optical properties of the synthesized quantum dot. This study on aggregation-free cysteamine capped quantum dots has the potential to develop advanced quantum dot-based sensor technologies, including biomedical imaging and environmental sensors.

ACS Style

Daekyung Kang; Mareddi Bharath Kumar; Changhee Son; Hongsik Park; Jonghoo Park. Simple Synthesis Method and Characterizations of Aggregation-Free Cysteamine Capped PbS Quantum Dot. Applied Sciences 2019, 9, 4661 .

AMA Style

Daekyung Kang, Mareddi Bharath Kumar, Changhee Son, Hongsik Park, Jonghoo Park. Simple Synthesis Method and Characterizations of Aggregation-Free Cysteamine Capped PbS Quantum Dot. Applied Sciences. 2019; 9 (21):4661.

Chicago/Turabian Style

Daekyung Kang; Mareddi Bharath Kumar; Changhee Son; Hongsik Park; Jonghoo Park. 2019. "Simple Synthesis Method and Characterizations of Aggregation-Free Cysteamine Capped PbS Quantum Dot." Applied Sciences 9, no. 21: 4661.

Journal article
Published: 01 July 2018 in Current Applied Physics
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Taewan Kim; Daehwa Joung; Jonghoo Park. Electrical metal contacts to atomically thin 2H-phase MoTe 2 grown by metal–organic chemical vapor deposition. Current Applied Physics 2018, 18, 843 -846.

AMA Style

Taewan Kim, Daehwa Joung, Jonghoo Park. Electrical metal contacts to atomically thin 2H-phase MoTe 2 grown by metal–organic chemical vapor deposition. Current Applied Physics. 2018; 18 (7):843-846.

Chicago/Turabian Style

Taewan Kim; Daehwa Joung; Jonghoo Park. 2018. "Electrical metal contacts to atomically thin 2H-phase MoTe 2 grown by metal–organic chemical vapor deposition." Current Applied Physics 18, no. 7: 843-846.

Communication
Published: 04 June 2018 in Advanced Materials Interfaces
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2D materials beyond molybdenum disulfide such as molybdenum ditelluride (MoTe2) have attracted increasing attention because of their distinctive properties, such as phase‐engineered, relatively narrow direct bandgap of 1.0–1.1 eV and superior carrier transport. However, a wafer‐scale synthesis process is required for achieving practical applications in next‐generation electronic devices using MoTe2 thin films. Herein, the direct growth of atomically thin 1T′, 1T′–2H mixed, and 2H phases MoTe2 films on a 4 in. SiO2/Si wafer with high spatial uniformity (≈96%) via metal–organic vapor phase deposition is reported. Furthermore, the wafer‐scale phase engineering of few‐layer MoTe2 film is investigated by controlling the H2 molar flow rate. While the use of a low H2 molar flow rate results in 1T′ and 1T′–2H mixed phase MoTe2 films, 2H phase MoTe2 films are obtained at a high H2 molar flow rate. Field‐effect transistors fabricated with the prepared 2H and 1T′ phases MoTe2 channels reveal p‐type semiconductor and semimetal properties, respectively. This work demonstrates the potential for reliable wafer‐scale production of 1T′ and 2H phases MoTe2 thin films employing the H2 molar flow rate‐controlled phase tunable method for practical applications in next‐generation electronic devices as a p‐type semiconductor and Wyle semimetal.

ACS Style

Taewan Kim; Hyeji Park; Daehwa Joung; Donghwan Kim; Rochelle Lee; Chae Ho Shin; Mangesh Diware; Won Chegal; Soo Hwan Jeong; Jae Cheol Shin; Jonghoo Park; Sang-Woo Kang. Wafer-Scale Epitaxial 1T′, 1T′-2H Mixed, and 2H Phases MoTe2 Thin Films Grown by Metal-Organic Chemical Vapor Deposition. Advanced Materials Interfaces 2018, 5, 1 .

AMA Style

Taewan Kim, Hyeji Park, Daehwa Joung, Donghwan Kim, Rochelle Lee, Chae Ho Shin, Mangesh Diware, Won Chegal, Soo Hwan Jeong, Jae Cheol Shin, Jonghoo Park, Sang-Woo Kang. Wafer-Scale Epitaxial 1T′, 1T′-2H Mixed, and 2H Phases MoTe2 Thin Films Grown by Metal-Organic Chemical Vapor Deposition. Advanced Materials Interfaces. 2018; 5 (15):1.

Chicago/Turabian Style

Taewan Kim; Hyeji Park; Daehwa Joung; Donghwan Kim; Rochelle Lee; Chae Ho Shin; Mangesh Diware; Won Chegal; Soo Hwan Jeong; Jae Cheol Shin; Jonghoo Park; Sang-Woo Kang. 2018. "Wafer-Scale Epitaxial 1T′, 1T′-2H Mixed, and 2H Phases MoTe2 Thin Films Grown by Metal-Organic Chemical Vapor Deposition." Advanced Materials Interfaces 5, no. 15: 1.

Journal article
Published: 30 September 2017 in Applied Science and Convergence Technology
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Fabrication of Two-dimensional MoS2 Films-based Field Effect Transistor for High Mobility Electronic Device Application $MoS_2$;FET Device;CVD;Photolithography; The two-dimensional layered $MoS_2$ has high mobility and excellent optical properties, and there has been much research on the methods for using this for next generation electronics. $MoS_2$ is similar to graphene in that there is comparatively weak bonding through Van der Waals covalent bonding in the substrate-$MoS_2$ and $MoS_2-MoS_2$ heteromaterial as well in the layer-by-layer structure. So, on the monatomic level, $MoS_2$ can easily be exfoliated physically or chemically. During the $MoS_2$ field-effect transistor fabrication process of photolithography, when using water, the water infiltrates into the substrate-$MoS_2$ gap, and leads to the problem of a rapid decline in the material's yield. To solve this problem, an epoxy-based, as opposed to a water-based photoresist, was used in the photolithography process. In this research, a hydrophobic $MoS_2$ field effect transistor (FET) was fabricated on a hydrophilic $SiO_2$ substrate via chemical vapor deposition CVD. To solve the problem of $MoS_2$ exfoliation that occurs in water-based photolithography, a PPMA sacrificial layer and SU-8 2002 were used, and a $MoS_2$ film FET was successfully created. To minimize Ohmic contact resistance, rapid thermal annealing was used, and then electronic properties were measured.

ACS Style

Daehwa Joung; Hyeji Park; Jihun Mun; Jonghoo Park; Sang-Woo Kang; Taewan Kim. Fabrication of Two-dimensional MoS2 Films-based Field Effect Transistor for High Mobility Electronic Device Application. Applied Science and Convergence Technology 2017, 26, 110 -113.

AMA Style

Daehwa Joung, Hyeji Park, Jihun Mun, Jonghoo Park, Sang-Woo Kang, Taewan Kim. Fabrication of Two-dimensional MoS2 Films-based Field Effect Transistor for High Mobility Electronic Device Application. Applied Science and Convergence Technology. 2017; 26 (5):110-113.

Chicago/Turabian Style

Daehwa Joung; Hyeji Park; Jihun Mun; Jonghoo Park; Sang-Woo Kang; Taewan Kim. 2017. "Fabrication of Two-dimensional MoS2 Films-based Field Effect Transistor for High Mobility Electronic Device Application." Applied Science and Convergence Technology 26, no. 5: 110-113.

Journal article
Published: 05 February 2016 in Sensors
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We demonstrate mechanical modulation of phonon-assisted field emission in a free-standing silicon nanomembrane detector for time-of-flight mass spectrometry of proteins. The impacts of ion bombardment on the silicon nanomembrane have been explored in both mechanical and electrical points of view. Locally elevated lattice temperature in the silicon nanomembrane, resulting from the transduction of ion kinetic energy into thermal energy through the ion bombardment, induces not only phonon-assisted field emission but also a mechanical vibration in the silicon nanomembrane. The coupling of these mechanical and electrical phenomenon leads to mechanical modulation of phonon-assisted field emission. The thermal energy relaxation through mechanical vibration in addition to the lateral heat conduction and field emission in the silicon nanomembrane offers effective cooling of the nanomembrane, thereby allowing high resolution mass analysis.

ACS Style

Jonghoo Park; Robert H. Blick. Mechanical Modulation of Phonon-Assisted Field Emission in a Silicon Nanomembrane Detector for Time-of-Flight Mass Spectrometry. Sensors 2016, 16, 200 .

AMA Style

Jonghoo Park, Robert H. Blick. Mechanical Modulation of Phonon-Assisted Field Emission in a Silicon Nanomembrane Detector for Time-of-Flight Mass Spectrometry. Sensors. 2016; 16 (2):200.

Chicago/Turabian Style

Jonghoo Park; Robert H. Blick. 2016. "Mechanical Modulation of Phonon-Assisted Field Emission in a Silicon Nanomembrane Detector for Time-of-Flight Mass Spectrometry." Sensors 16, no. 2: 200.

Journal article
Published: 30 December 2013 in Journal of the Korean Oil Chemists' Society
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ACS Style

Jong-Hoo Park. Thermo-Field emission in silicon nanomembrane ion detector for mass spectrometry. Journal of the Korean Oil Chemists' Society 2013, 30, 586 -591.

AMA Style

Jong-Hoo Park. Thermo-Field emission in silicon nanomembrane ion detector for mass spectrometry. Journal of the Korean Oil Chemists' Society. 2013; 30 (4):586-591.

Chicago/Turabian Style

Jong-Hoo Park. 2013. "Thermo-Field emission in silicon nanomembrane ion detector for mass spectrometry." Journal of the Korean Oil Chemists' Society 30, no. 4: 586-591.

Journal article
Published: 11 October 2013 in Sensors
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We describe a MALDI-TOF ion detector based on freestanding silicon nanomembrane technology. The detector is tested in a commercial MALDI-TOF mass spectrometer with equimolar mixtures of proteins. The operating principle of the nanomembrane detector is based on phonon-assisted field emission from these silicon nanomembranes, in which impinging ion packets excite electrons in the nanomembrane to higher energy states. Thereby the electrons can overcome the vacuum barrier and escape from the surface of the nanomembrane via field emission. Ion detection is demonstrated of apomyoglobin (16,952 Da), aldolase (39,212 Da), bovine serum albumin (66,430 Da), and their equimolar mixtures. In addition to the three intact ions, a large number of fragment ions are also revealed by the silicon nanomembrane detector, which are not observable with conventional detectors.

ACS Style

Jonghoo Park; Robert H. Blick. A Silicon Nanomembrane Detector for Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) of Large Proteins. Sensors 2013, 13, 13708 -13716.

AMA Style

Jonghoo Park, Robert H. Blick. A Silicon Nanomembrane Detector for Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) of Large Proteins. Sensors. 2013; 13 (10):13708-13716.

Chicago/Turabian Style

Jonghoo Park; Robert H. Blick. 2013. "A Silicon Nanomembrane Detector for Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) of Large Proteins." Sensors 13, no. 10: 13708-13716.

Journal article
Published: 01 January 2013 in Soft Nanoscience Letters
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We present first results from a hybrid coplanar waveguide microfluidic tank circuit for monitoring lipid bilayer formation and fluctuations of integrated proteins. The coplanar waveguide is a radio frequency resonator operating at ~250 MHz. Changes within the integrated microfluidic chamber, such as vesicle bursting and subsequent nanopore formation alter the reflected signal, and can be detected with nanosecond resolution. We show experimental evidence of such alterations when the microfluidic channel is filled with giant unilamellar vesicles (GUVs). Subsequent settling and bursting of the GUVs form planar lipid bilayers, yielding a detectable change in the resonant frequency of the device. Results from finite element simulations of our device correlate well with our experimental evidence. These simulations also indicate that nanopore formation within the bilayer is easily detectable. The simulated structure allows for incorporation of microfluidics as well as simultaneous RF and DC recordings. The technique holds promise for high throughput drug screening applications and could also be used as an in-plane probe for various other applications. It opens up possibilities of exploring ion channels and other nano scale pores in a whole new frequency band allowing for operating at bandwidths well above the traditional DC methods.

ACS Style

Abhishek Bhat; Jonathan Rodriguez; Hua Qin; Hyun Cheol Shin; Joerg Clobes; Dustin Kreft; Jonghoo Park; Eric Stava; Minrui Yu; Robert H. Blick. Radio Frequency Tank Circuit for Probing Planar Lipid Bilayers. Soft Nanoscience Letters 2013, 03, 87 -92.

AMA Style

Abhishek Bhat, Jonathan Rodriguez, Hua Qin, Hyun Cheol Shin, Joerg Clobes, Dustin Kreft, Jonghoo Park, Eric Stava, Minrui Yu, Robert H. Blick. Radio Frequency Tank Circuit for Probing Planar Lipid Bilayers. Soft Nanoscience Letters. 2013; 03 (04):87-92.

Chicago/Turabian Style

Abhishek Bhat; Jonathan Rodriguez; Hua Qin; Hyun Cheol Shin; Joerg Clobes; Dustin Kreft; Jonghoo Park; Eric Stava; Minrui Yu; Robert H. Blick. 2013. "Radio Frequency Tank Circuit for Probing Planar Lipid Bilayers." Soft Nanoscience Letters 03, no. 04: 87-92.

Journals
Published: 25 January 2012 in Nanoscale
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Mechanical resonators realized on the nano-scale by now offer applications in mass-sensing of biomolecules with extraordinary sensitivity. The general idea is that perfect mechanical biosensors should be of extremely small size to achieve zeptogram sensitivity in weighing single molecules similar to a balance. However, the small scale and long response time of weighing biomolecules with a cantilever restrict their usefulness as a high-throughput method. Commercial mass spectrometry (MS) such as electro-spray ionization (ESI)-MS and matrix-assisted laser desorption/ionization (MALDI)-time of flight (TOF)-MS are the gold standards to which nanomechanical resonators have to live up to. These two methods rely on the ionization and acceleration of biomolecules and the following ion detection after a mass selection step, such as time-of-flight (TOF). Hence, the spectrum is typically represented in m/z, i.e. the mass to ionization charge ratio. Here, we describe the feasibility and mass range of detection of a new mechanical approach for ion detection in time-of-flight mass spectrometry, the principle of which is that the impinging ion packets excite mechanical oscillations in a silicon nitride nanomembrane. These mechanical oscillations are henceforth detected via field emission of electrons from the nanomembrane. Ion detection is demonstrated in MALDI-TOF analysis over a broad range with angiotensin, bovine serum albumin (BSA), and an equimolar protein mixture of insulin, BSA, and immunoglobulin G (IgG). We find an unprecedented mass range of operation of the nanomembrane detector.

ACS Style

Jonghoo Park; Hyunseok Kim; Robert H. Blick. Quasi-dynamic mode of nanomembranes for time-of-flight mass spectrometry of proteins. Nanoscale 2012, 4, 2543 .

AMA Style

Jonghoo Park, Hyunseok Kim, Robert H. Blick. Quasi-dynamic mode of nanomembranes for time-of-flight mass spectrometry of proteins. Nanoscale. 2012; 4 (8):2543.

Chicago/Turabian Style

Jonghoo Park; Hyunseok Kim; Robert H. Blick. 2012. "Quasi-dynamic mode of nanomembranes for time-of-flight mass spectrometry of proteins." Nanoscale 4, no. 8: 2543.

Journal article
Published: 01 January 2012 in Biophysical Journal
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Abhishek Bhat; Jonathan Rodriguez; Hua Qin; Dustin Kreft; Jonghoo Park; Eric Stava; Minrui Yu; Robert H. Blick; Hyun Cheol Shin; Hyuncheol Shin. High Bandwidth Resonant Radio Frequency Circuit for Lipid Bilayer Detection. Biophysical Journal 2012, 102, 181a .

AMA Style

Abhishek Bhat, Jonathan Rodriguez, Hua Qin, Dustin Kreft, Jonghoo Park, Eric Stava, Minrui Yu, Robert H. Blick, Hyun Cheol Shin, Hyuncheol Shin. High Bandwidth Resonant Radio Frequency Circuit for Lipid Bilayer Detection. Biophysical Journal. 2012; 102 (3):181a.

Chicago/Turabian Style

Abhishek Bhat; Jonathan Rodriguez; Hua Qin; Dustin Kreft; Jonghoo Park; Eric Stava; Minrui Yu; Robert H. Blick; Hyun Cheol Shin; Hyuncheol Shin. 2012. "High Bandwidth Resonant Radio Frequency Circuit for Lipid Bilayer Detection." Biophysical Journal 102, no. 3: 181a.

Journal article
Published: 15 June 2011 in Journal of Applied Physics
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ACS Style

Hua Qin; Renbing Tan; Jonghoo Park; Hyun-Seok Kim; Robert H. Blick. Direct observation of sub-threshold field emission from silicon nanomembranes. Journal of Applied Physics 2011, 109, 124504 .

AMA Style

Hua Qin, Renbing Tan, Jonghoo Park, Hyun-Seok Kim, Robert H. Blick. Direct observation of sub-threshold field emission from silicon nanomembranes. Journal of Applied Physics. 2011; 109 (12):124504.

Chicago/Turabian Style

Hua Qin; Renbing Tan; Jonghoo Park; Hyun-Seok Kim; Robert H. Blick. 2011. "Direct observation of sub-threshold field emission from silicon nanomembranes." Journal of Applied Physics 109, no. 12: 124504.

Article
Published: 04 August 2010 in Physical Review Letters
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We present spontaneous symmetry breaking in a nanoscale version of a setup prolific in classical mechanics: two coupled nanomechanical pendula. The two pendula are electron shuttles fabricated as nanopillars [D. V. Scheible and R. H. Blick, Appl. Phys. Lett. 84, 4632 (2004).10.1063/1.1759371] and placed between two capacitor plates in a homogeneous electric field. Instead of being mechanically coupled through a spring they exchange electrons, i.e., they shuttle electrons from the source to the drain "capacitor plate." The nonzero dc current through this system by external ac excitation is caused via dynamical symmetry breaking. This symmetry-broken current appears at sub- and superharmonics of the fundamental mode of the coupled system.

ACS Style

Chulki Kim; Jonghoo Park; Robert H. Blick. Spontaneous Symmetry Breaking in Two Coupled Nanomechanical Electron Shuttles. Physical Review Letters 2010, 105, 1 .

AMA Style

Chulki Kim, Jonghoo Park, Robert H. Blick. Spontaneous Symmetry Breaking in Two Coupled Nanomechanical Electron Shuttles. Physical Review Letters. 2010; 105 (6):1.

Chicago/Turabian Style

Chulki Kim; Jonghoo Park; Robert H. Blick. 2010. "Spontaneous Symmetry Breaking in Two Coupled Nanomechanical Electron Shuttles." Physical Review Letters 105, no. 6: 1.

Preprint
Published: 12 April 2010
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We present spontaneous symmetry breaking in a nanoscale version of a setup prolific in classical mechanics: two coupled nanomechanical pendulums. The two pendulums are electron shuttles fabricated as nanopillars and placed between two capacitor plates in a homogeneous electric field. Instead of being mechanically coupled through a spring they exchange electrons, i.e. they shuttle electrons from the source to the drain 'capacitor plate'. Nonzero DC current through this system by external AC excitation is caused via dynamical symmetry breaking. This symmetry-broken current appears at sub- and superharmonics of the fundamental mode of the coupled system.

ACS Style

Chulki Kim; Jonghoo Park; Robert H. Blick. Spontaneous Symmetry Breaking in Two Coupled Nanomechanical Electron Shuttles. 2010, 1 .

AMA Style

Chulki Kim, Jonghoo Park, Robert H. Blick. Spontaneous Symmetry Breaking in Two Coupled Nanomechanical Electron Shuttles. . 2010; ():1.

Chicago/Turabian Style

Chulki Kim; Jonghoo Park; Robert H. Blick. 2010. "Spontaneous Symmetry Breaking in Two Coupled Nanomechanical Electron Shuttles." , no. : 1.