Article
Chemistry, Multidisciplinary
Won-Geun Kim, Vasanthan Devaraj, Younghwan Yang, Jong-Min Lee, Ji Tae Kim, Jin-Woo Oh, Junsuk Rho
Summary: The study focuses on metallic nanoparticles supporting localized surface plasmons and their self-assembled clustering technique, proposing a micropipette-based self-assembly method for fabricating three-dimensional structures composed of colloidal clusters. Experimental demonstrations of the optical properties of these structures, as well as theoretical demonstrations of their localized surface plasmon resonance and thermo-plasmonic properties, were carried out.
Article
Chemistry, Multidisciplinary
Negar Gheshlaghi, Sina Foroutan-Barenji, Onur Erdem, Yemliha Altintas, Farzan Shabani, Muhammad Hamza Humayun, Hilmi Volkan Demir
Summary: The study presents the first account of self-resonant fully colloidal mu-lasers made from colloidal quantum well (CQW) solution. A deep patterning technique is developed to fabricate well-defined high aspect-ratio on-chip CQW resonators, allowing for in-plane lasing with tight optical confinement. The method is also successfully applied to various nanoparticles without affecting their physical and chemical properties.
Review
Optics
K. Monisha, K. Suresh, Sajan D. George
Summary: The conversion of light to heat via the photothermal effect has been used to evaluate thermo-optic properties of materials, but recently it has also been used for the manipulation of colloidal objects and living cells. Optothermal manipulation techniques utilize lower optical power and can manipulate particles over a long range compared to conventional optical tweezers. This review discusses the working mechanisms, concepts, and applications of recently established optothermal techniques, as well as the physical mechanisms behind the optical manipulation.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Junhee Park, Seungki Lee, Hyunjoo Lee, Seungyeon Han, Tae Ho Kang, Dongchoul Kim, Taewook Kang, Inhee Choi
Summary: A facile method is reported to produce 3D multiscale assemblies of various colloids for sensitive in-solution surface-enhanced Raman spectroscopy (SERS) detection without chemical linkers and templates by exploiting photothermally driven convective flow.
Article
Multidisciplinary Sciences
Seongkyu Maeng, Sun Jae Park, Jaehwan Lee, Hyungdoh Lee, Jonghui Choi, Jeung Ku Kang, Himchan Cho
Summary: We propose a universal direct photocatalytic patterning method that can preserve the optical properties of nanocrystals and other emissive nanomaterials, while enhancing the photoluminescence quantum yield and photostability of certain materials. This method has the potential to pattern various functional materials and devices in a nondestructive and simple way.
Article
Chemistry, Multidisciplinary
Joshua E. Kauffman, Benjamin M. Tansi, Christopher LaSalle, Raj Kumar Manna, Oleg E. Shklyaev, Anna C. Balazs, Ayusman Sen
Summary: The system described in the article utilizes the photothermal properties of plasmonic nanoparticles to achieve directed motility and separation of larger microparticles, with the ability to relocate particle clusters and separate particles of different sizes on an inclined plane using thermal convection.
Article
Materials Science, Multidisciplinary
Hyunji Shim, Siwon Hwang, Eunjeong Byun, Minyoung Choi, Bongjun Kim, Seunghyun Song
Summary: This study develops a method to embed patterned plasmonic metal nanoparticles in silicone elastomer by inkjet printing metal ion solution. The capability of patterning is demonstrated and a photothermal microfluidic pump is fabricated, showing the potential utility of the inkjet patterned metal nanoparticles in silicone elastomer.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Oriol Colomer-Ferrer, Serni Toda Cosi, Ylli Conti, David E. Medina-Quiroz, Leonardo Scarabelli, Agustin Mihi
Summary: Templated self-assembly is a versatile method for fabricating plasmonic ordered arrays, and the modification before and after assembly can control the optical properties. Thermal annealing can improve the quality factor of plasmonic resonance in gold nanoparticle arrays.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Zhijian Mai, Ye Yuan, Jung-Shen B. Tai, Bohdan Senyuk, Bing Liu, Hao Li, Yao Wang, Guofu Zhou, Ivan I. Smalyukh
Summary: Dispersing pentagonal gold bipyramids in nematic liquid crystals allows for narrow and controlled polarization-dependent surface plasmon resonance spectra, with easy electric switching. The bipyramids orient with their C-5 rotation symmetry axes along the nematic director, showing spatially homogeneous density in aligned samples. Topological solitons enable spatial reorganization of the nanoparticles based on elastic free energy density within their micrometer-scale structures.
Article
Physics, Applied
Jiajia Sun, Zongqian Shi, Mingjia Li, Shuang Chen, Mingjie Zhong, Xiaofeng Liu, Jingjie Sha, Shenli Jia
Summary: The use of microfluidic and magnetic field-assisted self-assembly allows for the patterning of colloidal magnetic-plasmonic nanoparticles in a controlled environment, opening up new possibilities for assembling complex structures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Tucker L. Murrey, Justin T. Mulvey, Meghna Jha, Alice S. Fergerson, Daniel Vong, Andreas Soika, Jakob Lorek, Sarah E. Dolan, Daniel R. Tiffany-Appleton, Adam J. Moule
Summary: A novel method called Projection Photothermal Lithography (PPL) is introduced for patterning semiconducting polymers. Experimental results demonstrate that rapid and large area sub-micron patterns can be obtained using this method.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Multidisciplinary Sciences
Zhiyuan Qu, Peng Zhou, Fanyi Min, Shengnan Chen, Mengmeng Guo, Zhandong Huang, Shiyang Ji, Yongli Yan, Xiaodong Yin, Hanqiu Jiang, Yubin Ke, Yong Sheng Zhao, Xuehai Yan, Yali Qiao, Yanlin Song
Summary: We propose a bubble-template molecular printing concept that utilizes ultrathin liquid films to confine the self-assembly of molecules, achieving high-precision assembly at the molecular scale.
Article
Chemistry, Multidisciplinary
Wenhao Dong, Yan Zhang, Chenglin Yi, Julia J. Chang, Shunsheng Ye, Zhihong Nie
Summary: This study describes the reversible self-assembly of plasmonic nanoparticles capped with complementary copolymer ligands into colloidal molecules via halogen bonding interactions. The coordination number of the colloidal molecules is determined by the number ratio of complementary halogen groups on the interacting nanoparticles. The reversibility of the halogen bonds allows for controlling the formation and disassociation of the colloidal molecules and their optical properties. The engineered reversible nanostructures may have applications in sensing, catalysis, and optoelectronic devices.
Article
Chemistry, Multidisciplinary
Taewoo Ko, Samir Kumar, Sanghoon Shin, Dongmin Seo, Sungkyu Seo
Summary: In this study, a novel approach to pattern quantum dot (QD) nanopatterns by electron beam lithography was presented. Colloidal QDs were used without additional modifications, and reliable dot and line patterns with dimensions as small as 140 nm were successfully generated. Additionally, it was shown that using a SiO2 spacer layer on a Au substrate can significantly enhance the fluorescence intensity of QDs.
Article
Chemistry, Multidisciplinary
Marcel Herber, Daniel Lengle, Silvano R. Valandro, Moritz Wehrmeister, Eric H. Hill
Summary: The plasmonic heating of MXenes was utilized to achieve controlled deposition and assembly. The optimal conditions for printing MXene assemblies were determined by investigating various factors. The printed MXene assemblies demonstrated good electrical conductivity and sensing capabilities, surpassing the current state of the art without additional postprocessing steps. This study represents the first directed approach for microfabrication using MXenes and lays the foundation for future work in optically directed assembly of MXenes and MXene-based nanocomposites.
Article
Nanoscience & Nanotechnology
Hyun Ji An, Hyo Sil Kim, Jung A. Kwon, Jihwan Song, Inhee Choi
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Nanoscience & Nanotechnology
Eun-Jung Park, Soo Nam Kim, Cheolho Yoon, Jae-Woo Cho, Gwang-Hee Lee, Dong-Wan Kim, Junhee Park, Inhee Choi, Seung Hyeun Lee, Jeongah Song, Hyun-Ji Lim, Min-Sung Kang, Hong-Soo Lee
Summary: Recent research has shown that inhaled zinc oxide nanoparticles can induce acute systemic inflammation in cynomolgus monkeys, leading to cell death, tissue damage, and migration of particles to other tissues causing a systemic response. The CRP level is suggested as a biomarker for zinc oxide nanoparticle-induced adverse health effects based on evidence from workers.
Article
Chemistry, Analytical
Yonghee Shin, Keumrai Whang, Jeong Ha Hwang, Yuseung Jo, Jeong-Woo Choi, Junhee Park, Inhee Choi, Taewook Kang
Summary: By using near-infrared Raman technique, the dynamics of CO release from CORMs was successfully investigated, showing that the release rate of CO is significantly influenced by pH and temperature.
ANALYTICAL CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Eun-Jung Park, Min-Sung Kang, Seung-Woo Jin, Tae Geol Lee, Gwang-Hee Lee, Dong-Wan Kim, Eun-Woo Lee, Junhee Park, Inhee Choi, Youngmi Kim Pak
Summary: 20-nm and 50-nm sized amorphous silica nanoparticles induced different responses in alveolar macrophages, with more severe cellular damage observed in cells treated with 20-SiNPs, potentially associated with paraptosis.
Article
Chemistry, Multidisciplinary
Donghun Shin, Seungki Lee, Hyun Sung Jang, Ji Bong Joo, Inhee Choi
Summary: In this study, dual-responsive hollow mesoporous silica nanoparticles (HMSNs) capped with hyaluronic acid (HA) were designed as drug carriers, exhibiting enhanced targeting efficiency and drug release efficiency. This research provides a new possibility for further improving drug delivery efficiency.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jae Yeon Lee, Seungki Lee, Donghun Shin, Jung Tae Park, Inhee Choi
Summary: This study investigates the use of heterometallic interfaces on metal-organic framework-derived structures as surface-enhanced Raman scattering (SERS)-active substrates for sensitive and homogeneous SERS detection. The results show that the heterometallic-interfaced ZIF-67-CO can provide reproducible SERS signals of various target analytes with enhanced Raman intensity and shift mapping over a large area.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Analytical
Jieun You, Seungki Lee, Hyun Jin Tark, Min Jeong Nang, Ji Hyeon Oh, Inhee Choi
Summary: This study demonstrates a simple optical method for detecting Cu2+ using plasmonic sugar nanoprobes composed of gold nanoparticles and polysaccharides. Cu2+ can be easily detected below the international standard level by optimizing the experimental conditions.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ayeong Yu, Younggi Hong, Eunhyun Song, Hakchun Kim, Inhee Choi, Munju Goh
Summary: This study presents a method for the chemical depolymerization of epoxy resin in carbon composites using hydroxyl radicals. The decomposition of epoxy resin was found to be complete within 2 hours at 100 degrees C using hydroxyl radicals generated from NaOCl. Different radical initiators, such as KPS and ACVA, were evaluated for their effect on the acceleration of hydroxyl radical generation. The results show that the combination of NaOCl and KPS significantly increased the reaction rate constant in CFRP recycling.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Junhee Park, Seungki Lee, Hyunjoo Lee, Seungyeon Han, Tae Ho Kang, Dongchoul Kim, Taewook Kang, Inhee Choi
Summary: A facile method is reported to produce 3D multiscale assemblies of various colloids for sensitive in-solution surface-enhanced Raman spectroscopy (SERS) detection without chemical linkers and templates by exploiting photothermally driven convective flow.
Article
Nanoscience & Nanotechnology
Hakchun Kim, Hyun Ji An, Junhee Park, Yohan Lee, Min Seob Kim, Seungki Lee, Nam Dong Kim, Jihwan Song, Inhee Choi
Summary: The article introduces an optically tunable plasmonic interface covered with graphene for monitoring cellular ROS levels. By adjusting the scattering profiles of the graphene-covered plasmonic nanoprobe, the PRET signal can be monitored in real time. Calibration curves for hydrogen peroxide were obtained, and cell adhesion was confirmed by immunofluorescence images. Real-time ROS generated by cells under oxidative stress conditions were observed through spectral changes of the probes.
Article
Chemistry, Multidisciplinary
Eui-Sang Yu, Eui Tae Jeong, Seungha Lee, In Soo Kim, Seok Chung, Seungyeon Han, Inhee Choi, Yong-Sang Ryu
Summary: Nanoplastics in the ecosystem raise significant concerns, but their effects and quantity remain unclear. This study enables rapid collection and detection of underwater nanoplastics using new techniques.
Article
Chemistry, Multidisciplinary
Egor Kokin, Hyun Ji An, Donghoon Koo, Seungyeon Han, Keumrai Whang, Taewook Kang, Inhee Choi, Luke P. Lee
Summary: This study reports the quantum electrodynamic behavior of chlorophyll-a in a plasmonic nanocavity. By constructing an extreme plasmonic nanocavity and using hyperspectral imaging technology, the energy level splitting of chlorophyll-a was observed. This study provides important insights for further exploration in quantum biological electron or energy transfer, electrodynamics, and other fields.
Article
Nanoscience & Nanotechnology
Doyun Kim, Kun Woo Park, Inhee Choi, Jung Tae Park
Summary: Conventional antibiotic treatment is difficult due to multidrug resistance caused by abuse. We developed a cobalt-silver bimetallic nanocomposite with strong antibacterial activity and photothermal conversion effect. This nanocomposite released antibacterial metal ions continuously and exhibited enhanced inhibition of bacterial growth even with a small amount.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Taehyun Kim, Jongsu Lee, Eui-Sang Yu, Seungha Lee, Hyeonbin Woo, Jeonghun Kwak, Seok Chung, Inhee Choi, Yong-Sang Ryu
Summary: This article introduces the structure and characteristics of the Fabry-Perot (FP) resonator, and demonstrates the tuning of surface-enhanced Raman scattering (SERS) enhancement factor (EF) using a metal-dielectric-metal structure. Computational and experimental analyses investigate the near-field EF of randomly dispersed gold nano-gaps and the far-field SERS EF modulation by varying the optical resonance of the FP etalon. The study highlights the importance of wavelength matching between FP resonance and excitation/scattering wavelengths in determining the magnitude of the SERS EF. Finally, a tunable SERS platform with a controlled dielectric cavity is proposed, and its dynamic SERS switching performance is validated through information encryption via liquid immersion.
Article
Chemistry, Multidisciplinary
Seonghyeon Eom, So Yeon Lee, Jung Tae Park, Inhee Choi
Summary: While breathing, the exposure of alveoli to external irritants is important in understanding lung disease. This study presents a multifunctional scaffold that allows for optical and electrochemical monitoring of cellular responses of pneumocytes. The scaffold, made of a porous foam with integrated electroactive crystals, gold nanoparticles, and hyaluronic acid, enables label-free detection and real-time monitoring of oxidative stress in pneumocytes under toxic conditions. The developed scaffold is versatile in monitoring electrical and optical signals from cells in 3D microenvironments, making it a promising platform for investigating cellular responses and disease pathogenesis.