Search Results - "Joonhee Lee"

Tip-Enhanced Raman Spectromicroscopy on the Angstrom Scale: Bare and CO-Terminated Ag Tips by Tallarida, Nicholas, Lee, Joonhee, Apkarian, Vartkess Ara

“…The tip is key to the successful execution of tip-enhanced Raman scattering (TERS) measurements in the single molecule limit. We show that nanoscopically…”
Get full text

High‐Q, Low‐Threshold Monolithic Perovskite Thin‐Film Vertical‐Cavity Lasers by Chen, Songtao, Zhang, Cheng, Lee, Joonhee, Han, Jung, Nurmikko, Arto

“…A vertical‐cavity surface‐emitting perovskite laser is achieved using a microcavity configuration where CH3NH3PbI3 thin solid films are embedded within a…”
Get full text

A Photonic Crystal Laser from Solution Based Organo-Lead Iodide Perovskite Thin Films by Chen, Songtao, Roh, Kwangdong, Lee, Joonhee, Chong, Wee Kiang, Lu, Yao, Mathews, Nripan, Sum, Tze Chien, Nurmikko, Arto

“…Perovskite semiconductors are actively investigated for high performance solar cells. Their large optical absorption coefficient and facile solution-based,…”
Get full text

Tip-Enhanced Raman Spectromicroscopy of Co(II)-Tetraphenylporphyrin on Au(111): Toward the Chemists’ Microscope by Lee, Joonhee, Tallarida, Nicholas, Chen, Xing, Liu, Pengchong, Jensen, Lasse, Apkarian, Vartkess Ara

“…Atomically terminated and nanoscopically smooth silver tips effectively focus light on the angstrom scale, allowing tip-enhanced Raman spectromicroscopy…”
Get full text

Transparent intracortical microprobe array for simultaneous spatiotemporal optical stimulation and multichannel electrical recording by Lee, Joonhee, Ozden, Ilker, Song, Yoon-Kyu, Nurmikko, Arto V

“…Transparent micro-optoelectrode arrays enable simultaneous electrical recording and optical stimulation in precise alignment. Depending on the applied light…”
Get full text

Isomerization of One Molecule Observed through Tip-Enhanced Raman Spectroscopy by Tallarida, Nicholas, Rios, Laura, Apkarian, Vartkess A, Lee, Joonhee

“…While exploring photoisomerization of azobenzyl thiols (ABT) adsorbed on Au(111), through joint scanning tunneling microscopy (STM) and tip-enhanced Raman…”
Get full text

Mitigating Carbon Emissions: The Impact of Peat Moss Feeding on CH4 and CO2 Emissions during Pig Slurry Storage by Lee, Joonhee, Ahn, Heekwon

“…The present study investigated the impact of peat moss as a feed additive on the emission of methane (CH4) and carbon dioxide (CO2) from piggery slurry stored…”
Get full text

Anionic Polymerization of Azidoalkyl Glycidyl Ethers and Post-Polymerization Modification by Lee, Joonhee, Han, Sohee, Kim, Minseong, Kim, Byeong-Su

“…Polyethers like poly­(ethylene glycol) have been widely used for a variety of valuable applications, although their functionalization still poses challenges…”
Get full text

Fiber Orientation and Strain Rate-Dependent Tensile and Compressive Behavior of Injection Molded Polyamide-6 Reinforced with 20% Short Carbon Fiber by Lee, Joonhee, Lee, Hyungyil, Kim, Naksoo

“…As the interest in short-fiber reinforced polymer (SFRP) composites manufactured by injection molding increases, predicting the failure of SFRP structures…”
Get full text

Lead-free Mn-doped (K0.5,Na0.5)NbO3 piezoelectric thin films for MEMS-based vibrational energy harvester applications by Won, Sung Sik, Lee, Joonhee, Venugopal, Vineeth, Kim, Dong-Joo, Lee, Jinkee, Kim, Ill Won, Kingon, Angus I., Kim, Seung-Hyun

“…Lead-free Mn-doped (K0.5, Na0.5)NbO3 (KNN) thin films were fabricated by the chemical solution deposition method. The addition of small concentration of Mn…”
Get full text

Development of isotope dilution-liquid chromatography/tandem mass spectrometry for the accurate determination of trans- and cis-vitamin K1 isomers in infant formula by Lee, Hyeyoung, Lee, Joonhee, Choi, Kihwan, Kim, Byungjoo

“…•Application of ID-LC/MS/MS for the accurate determination of vitamin K1 isomers.•Quantification of trans- and cis-vitamin K1 in the primary reference material…”
Get full text

Recovery of synaptic loss and depressive-like behavior induced by GATA1 through blocking of the neuroinflammatory response by Choi, Koeul, Lee, Joonhee, Kim, Gukdo, Lim, Younghyun, Kang, Hyo Jung

“…GATA1, a member of the GATA transcription factor family, is a critical factor in hematopoietic system development. In a previous study, we demonstrated the…”
Get full text

Diffuseness Quantification in a Reverberation Chamber and Its Variation with Fine-Resolution Measurements by Zhang, Shuying, Lee, Joonhee

“…Insufficient diffuseness is the major cause of the poor repeatability and reproducibility of building acoustical measurements in a reverberation chamber…”
Get full text

The dynamics of nitrogen derived from a chemical nitrogen fertilizer with treated swine slurry in paddy soil-plant systems by Lee, Joonhee, Choi, Hong L

“…A well-managed chemical nitrogen (N) fertilization practice combined with treated swine slurry (TSS) is necessary to improve sustainability and N use…”
Get full text

A 14-nm 0.14-psrms Fractional-N Digital PLL With a 0.2-ps Resolution ADC-Assisted Coarse/Fine-Conversion Chopping TDC and TDC Nonlinearity Calibration by Chih-Wei Yao, Ronghua Ni, Chung Lau, Wanghua Wu, Godbole, Kunal, Yongrong Zuo, Sangsoo Ko, Nam-Seog Kim, Sangwook Han, Ikkyun Jo, Joonhee Lee, Juyoung Han, Daehyeon Kwon, Chulho Kim, Shinwoong Kim, Sang Won Son, Cho, Thomas Byunghak

“…A digital fractional-N phase-locked loop (PLL) is presented. It achieves 137and 142-fs rms jitter integrating from 10 kHz to 10 MHz and from 1 kHz to 10 MHz,…”
Get full text

Regulation of behavioral response to stress by microRNA-690 by Park, Jungyoung, Lee, Joonhee, Choi, Koeul, Kang, Hyo Jung

“…Psychiatric disorders are affected by genetic susceptibility and environmental adversities. Therefore, the regulation of gene expression under certain…”
Get full text

Synaptotagmin-4 induces anhedonic responses to chronic stress via BDNF signaling in the medial prefrontal cortex by Kim, Jeongseop, Seol, Sihwan, Kim, Tae-Eun, Lee, Joonhee, Koo, Ja Wook, Kang, Hyo Jung

“…Stressful circumstances are significant contributors to mental illnesses such as major depressive disorder. Anhedonia, defined as loss of the ability to enjoy…”
Get full text

Development of isotope dilution-liquid chromatography tandem mass spectrometry for the accurate determination of vitamin K1 in spinach and kimchi cabbage by Lee, Hyeyoung, Lee, Joonhee, Lee, Honghee, Kim, Byungjoo

“…In the human body, vitamin K 1 is important for bone and cardiovascular health and blood coagulation. To assess the correlation between vitamin K 1 intake and…”
Get full text

External Mergesort for Flash-Based Solid State Drives by Lee, Joonhee, Roh, Hongchan, Park, Sanghyun

“…Mergesort is the most widely-known external sorting algorithm, which is used when the data being sorted do not fit into the available main memory. There have…”
Get full text

Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films by Dang, Cuong, Lee, Joonhee, Breen, Craig, Steckel, Jonathan S., Coe-Sullivan, Seth, Nurmikko, Arto

Get full text