1
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Sun X, Ma WX, Zhang JX, Wang ZY, Wang Y, Zhang H, Du XY, Liu JD, Li W, Zhao ZB. Exploring the Impact of Visual Heat Conduction Paths on Thermal Conductivity of Polymer Composites and the Practical Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39041610 DOI: 10.1021/acs.langmuir.4c01981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
The theory of heat conduction paths has been widely recognized and widely studied in the research about the thermal conductivity of thermal conductive polymer composites at present. Encapsulating polymer pellets with thermally conductive fillers and processing them into thermally conductive polymer composites is a simple and effective method for constructing heat conduction paths. It is meaningful to investigate the related heat conduction mechanism of this method. Otherwise, this approach can significantly preserve the performance of the polymer substrate, making it highly valuable for practical material applications. In this work, polyethylene-octene elastomer (POE) pellets were encapsulated with thermal conductive fillers by physical absorption. Subsequently, the composite films containing heat conduction paths were fabricated using the encapsulated POE pellets through a heating press. Alumina (Al2O3), boron nitride (BN), and alumina/boron nitride hybrid (Al2O3/BN) fillers were used to prepare Al2O3@POE, BN@POE, and BN/Al2O3@POE composite films to investigate the influence of filler shapes on heat conduction path construction. The influence of the constitute and density of heat conduction paths on the thermal conductivity of composite films was analyzed by infrared thermal imaging, finite element analysis, and thermal resistance theory in detail. Owing to the reserved good adhesion and flexibility of the POE substrate, the composite films could be directly used as thermal interface materials for chip cooling, which presented a good heat dissipation effect. Furthermore, a series of integrated composite materials were prepared by the combination of encapsulated pellets with various functional films (copper foil, aluminum foil, and graphite sheet) through a one-pot heating press, exhibiting a good electromagnetic shielding effect. The performance of the composites and the corresponding preparation method demonstrate the strong significance of this research for practical applications.
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Affiliation(s)
- Xin Sun
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
| | - Wen-Xuan Ma
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
| | - Jian-Xin Zhang
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
| | - Zheng-Yi Wang
- Tesa (Suzhou) Tape Technology Co., Ltd., Suzhou 215000, PR China
| | - Yang Wang
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
| | - Heng Zhang
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
| | - Xiang-Yun Du
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, PR China
| | - Ji-Dong Liu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, PR China
| | - Weili Li
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
| | - Zheng-Bai Zhao
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China
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2
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Huang Y, Qian Y, Chang Y, Yu J, Li Q, Tang M, Yang X, Liu Z, Li H, Zhu Z, Li W, Zhang F, Qing G. Intense Left-handed Circularly Polarized Luminescence in Chiral Nematic Hydroxypropyl Cellulose Composite Films. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2308742. [PMID: 38270293 DOI: 10.1002/adma.202308742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 01/09/2024] [Indexed: 01/26/2024]
Abstract
Integrating optically active components into chiral photonic cellulose to fabricate circularly polarized luminescent materials has transformative potential in disease detection, asymmetric reactions, and anticounterfeiting techniques. However, the lack of cellulose-based left-handed circularly polarized light (L-CPL) emissions hampers the progress of these chiral functionalizations. Here, this work proposes an unprecedented strategy: incorporating a chiral nematic organization of hydroxypropyl cellulose with robust aggregation-induced emission luminogens to generate intense L-CPL emission. By utilizing N,N-dimethylformamide as a good solvent for fluorescent components and cellulose matrices, this work produces a right-handed chiral nematic structure film with a uniform appearance in reflective and fluorescent states. Remarkably, this system integrates a high asymmetric factor (0.51) and an impressive emission quantum yield (55.8%) into one fascinating composite. More meaningfully, this approach is versatile, allowing for the incorporation of luminogen derivatives emitting multicolored L-CPL. These chiral fluorescent films possess exceptional mechanical flexibility (toughness up to 0.9 MJ m-3) and structural stability even under harsh environmental exposures, making them promising for the fabrication of various products. Additionally, these films can be cast on the fabrics to reveal multilevel and durable anticounterfeiting capabilities or used as a chiral light source to induce enantioselective photopolymerization, thereby offering significant potential for diverse practical applications.
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Affiliation(s)
- Yuxiao Huang
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Yi Qian
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Yongxin Chang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Jiaqi Yu
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Qiongya Li
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Mingliang Tang
- College of Life Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Xindi Yang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Zhepai Liu
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Hui Li
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Zece Zhu
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Wei Li
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
| | - Fusheng Zhang
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Guangyan Qing
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing and Finishing, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, P. R. China
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
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3
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Chen X, Zhu R, Zhang B, Zhang X, Cheng A, Liu H, Gao R, Zhang X, Chen B, Ye S, Jiang J, Zhang G. Rapid room-temperature phosphorescence chiral recognition of natural amino acids. Nat Commun 2024; 15:3314. [PMID: 38632229 PMCID: PMC11024135 DOI: 10.1038/s41467-024-47648-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 04/09/2024] [Indexed: 04/19/2024] Open
Abstract
Chiral recognition of amino acids is very important in both chemical and life sciences. Although chiral recognition with luminescence has many advantages such as being inexpensive, it is usually slow and lacks generality as the recognition module relies on structural complementarity. Here, we show that one single molecular-solid sensor, L-phenylalanine derived benzamide, can manifest the structural difference between the natural, left-handed amino acid and its right-handed counterpart via the difference of room-temperature phosphorescence (RTP) irrespective of the specific chemical structure. To realize rapid and reliable sensing, the doped samples are obtained as nanocrystals from evaporation of the tetrahydrofuran solutions, which allows for efficient triplet-triplet energy transfer to the chiral analytes generated in situ from chiral amino acids. The results show that L-analytes induce strong RTP, whereas the unnatural D-analytes produce barely any afterglow. The method expands the scope of luminescence chiral sensing by lessening the requirement for specific molecular structures.
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Affiliation(s)
- Xiaoyu Chen
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Renlong Zhu
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Baicheng Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Xiaolong Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Aoyuan Cheng
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Hongping Liu
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Ruiying Gao
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xuepeng Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Biao Chen
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China.
| | - Shuji Ye
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Jun Jiang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China
| | - Guoqing Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Anhui, 230026, Hefei, China.
- Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui, 230094, China.
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4
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Ham SH, Han MJ, Kim M. Chiral Materials for Optics and Electronics: Ready to Rise? MICROMACHINES 2024; 15:528. [PMID: 38675339 PMCID: PMC11052036 DOI: 10.3390/mi15040528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/25/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024]
Abstract
Chiral materials have gained burgeoning interest in optics and electronics, beyond their classical application field of drug synthesis. In this review, we summarize the diverse chiral materials developed to date and how they have been effectively applied to optics and electronics to get an understanding and vision for the further development of chiral materials for advanced optics and electronics.
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Affiliation(s)
- Seo-Hyeon Ham
- Department of Chemical Engineering, Dankook University, Yongin 16890, Republic of Korea;
| | - Moon Jong Han
- Department of Electronic Engineering, Gachon University, Seongnam 13120, Republic of Korea
| | - Minkyu Kim
- Department of Chemical Engineering, Dankook University, Yongin 16890, Republic of Korea;
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5
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Wei G, Lu M, Feng K, Ma S, Jiang Y, Jin Z. Exploring the Core Parameters of CNC-Based Chiral Nematic Structures for Enhancing the Dissymmetry Factor of Right-Handed Circularly Polarized Luminescence. ACS OMEGA 2023; 8:23191-23201. [PMID: 37396231 PMCID: PMC10308516 DOI: 10.1021/acsomega.3c02969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Accepted: 05/09/2023] [Indexed: 07/04/2023]
Abstract
The chiral nematic nanostructure formed from cellulose nanocrystal (CNC) self-assembly has shown great potential as a matrix for generating circularly polarized luminescent (CPL) light with a high dissymmetry factor. Exploring the relationship between the device composition and structure and the light dissymmetry factor is crucial to a common strategy for a strongly dissymmetric CPL light. In this study, we have compared the single-layered and double-layered CNC-based CPL devices with different luminophores, such as rhodamine 6G (R6G), methylene blue (MB), crystal violet (CV), and silicon quantum dots (Si QDs). We demonstrated that forming a double-layered structure of CNCs nanocomposites is a simple but effective pathway for enhancing the CPL dissymmetry factor for CNC-based CPL materials containing different luminophores. The |glum| values of double-layered CNC devices (dye@CNC5||CNC5) versus that of single-layered devices (dye@CNC5) are 3.25 times for Si QDs, 3.7 times for R6G, 3.1 times for MB, and 2.78 times for CV series. The different enhancement degrees of these CNC layers with a similar thickness may be due to the different pitch numbers in the chiral nematic liquid crystal layers whose photonic band gap (PBG) has been modified to match the emission wavelengths of dyes. Furthermore, the assembled CNC nanostructure has great tolerance to the addition of nanoparticles. Gold nanorods coated with the SiO2 layer (Au NR@SiO2) were added for enhancing the dissymmetry factor of MB in CNC composites (named MAS devices). When the strong longitudinal plasmonic band of the Au NR@SiO2 matched the emission wavelength of MB and the PBG of assembled CNC structures simultaneously, the increase in the glum factor and quantum yield of MAS composites was obtained. The good compatibility of the assembled CNC nanostructures makes it a universal platform for developing strong CPL light sources with a high dissymmetry factor.
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Affiliation(s)
- Guodan Wei
- Key
Laboratory of Advanced Light Conversion Materials and Biophotonics,
Department of Chemistry, Renmin University
of China, 100872 Beijing, People’s Republic of China
| | - Mengfan Lu
- Key
Laboratory of Advanced Light Conversion Materials and Biophotonics,
Department of Chemistry, Renmin University
of China, 100872 Beijing, People’s Republic of China
| | - Kai Feng
- Key
Laboratory of Advanced Light Conversion Materials and Biophotonics,
Department of Chemistry, Renmin University
of China, 100872 Beijing, People’s Republic of China
| | - Sijia Ma
- Beijing
National Laboratory for Molecular Science (BNLMS), Key Laboratory
of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, ZhongGuanCun North First Street 2, 100190 Beijing, People’s Republic of China
- Key
Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nano-Science and Technology, 100190 Beijing, People’s Republic of China
| | - Yuqian Jiang
- Key
Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nano-Science and Technology, 100190 Beijing, People’s Republic of China
| | - Zhaoxia Jin
- Key
Laboratory of Advanced Light Conversion Materials and Biophotonics,
Department of Chemistry, Renmin University
of China, 100872 Beijing, People’s Republic of China
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6
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Han MJ, Kim M, Tsukruk VV. Chiro-Optoelectronic Encodable Multilevel Thin Film Electronic Elements with Active Bio-Organic Electrolyte Layer. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207921. [PMID: 36732850 DOI: 10.1002/smll.202207921] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 12/29/2022] [Indexed: 05/04/2023]
Abstract
It is suggested that chiral photonic bio-enabled integrated thin-film electronic elements can pave the base for next-generation optoelectronic processing, including quantum coding for encryption as well as integrated multi-level logic circuits. Despite recent advances, thin-film electronics for encryption applications with large-scale reconfigurable and multi-valued logic systems are not reported to date. Herein, highly secure optoelectronic encryption logic elements are demonstrated by facilitating the humidity-sensitive helicoidal organization of chiral nematic phases of cellulose nanocrystals (CNCs) as an active electrolyte layer combined with printed organic semiconducting channels. The ionic-strength controlled tunable photonic band gap facilitates distinguishable and quantized 13-bit electric signals triggered by repetitive changes of humidity, voltage, and the polarization state of the incident light. As a proof-of-concept, the integrated circuits responding to circularly polarized light and humidity are demonstrated as unique physically unclonable functional devices with high-level logic rarely achieved. The convergence between functional nanomaterials and the multi-valued logic thin-film electronic elements can provide optoelectronic counterfeiting, imaging, and information processing with multilevel logic nodes.
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Affiliation(s)
- Moon Jong Han
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Minkyu Kim
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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7
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Xing L, Li G, Sun Y, Wang X, Yuan Z, Fu Y, Qin M. Dual-emitting cellulose nanocrystal hybrid materials with circularly polarized luminescence for anti-counterfeiting labels. Carbohydr Polym 2023; 313:120856. [PMID: 37182956 DOI: 10.1016/j.carbpol.2023.120856] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/07/2023] [Accepted: 03/25/2023] [Indexed: 03/31/2023]
Abstract
Cellulose nanocrystal (CNC) hybrid materials with numerous optical states have great potential as anti-counterfeiting labels and information encryption materials. However, it is challenging to construct multicolor emitting materials with tunable behaviors, which can dramatically enhance anti-counterfeiting abilities. Here, free-standing composite films with vivid multi-structural colors and dual-emitting fluorescence are successfully fabricated through a host-guest coassembly strategy. The lanthanide complex and an aggregation-induced emission molecule (tetraphenylethylene derivative, TPEC) are selected as luminescent guests, which are integrated into the chiral nematic structure of CNCs. The obtained photonic films display broadband reflection across the visible spectrum, which may be attributed to the chiral nematic domains with variations in the helical pitches and helical axis orientations. Under 254 nm excitation, the film exhibits bright red emission, while blue-green emission switching occurs under 365 nm excitation. The broad reflection band of the film covers both the green and red fluorescent emission centers, and right circularly polarized luminescence emission with different dissymmetry factors is produced due to the selective reflection of the left chiral nematic structure. A large glum value up to -0.21 at 600 nm was realized. Additionally, CNC-based materials with tailored shapes are further used in anti-counterfeit tags and decorative applications.
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8
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Huang Z, He Z, Ding B, Tian H, Ma X. Photoprogrammable circularly polarized phosphorescence switching of chiral helical polyacetylene thin films. Nat Commun 2022; 13:7841. [PMID: 36543785 PMCID: PMC9772410 DOI: 10.1038/s41467-022-35625-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
The developments of pure organic room-temperature phosphorescence (RTP) materials with circularly polarized luminescence (CPL) have significantly facilitated the future integration and systemization of luminescent material in fundamental science and technological applications. Here, a type of photoinduced circularly polarized RTP materials are constructed by homogeneously dispersing phosphorescent chiral helical substituted polyacetylenes into a processable poly(methyl methacrylate) (PMMA) matrix. These substituted polyacetylenes play vital roles in the propagation of CPL and present prominently optical characteristics with high absorption and luminescent dissymmetric factors up to 0.029 (gabs) and 0.019 (glum). The oxygen consumption properties of the films under UV light irradiation endow materials with dynamic chiro-optical functionality, which can leverage of light to precisely control and manipulate the circularly polarized RTP properties with the remarkable advantages of being contactless, wireless and fatigue-resistant. Significantly, the distinct materials with dynamic properties can be used as anti-counterfeiting materials involving photoprogrammability.
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Affiliation(s)
- Zizhao Huang
- grid.28056.390000 0001 2163 4895Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 P. R. China
| | - Zhenyi He
- grid.28056.390000 0001 2163 4895Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 P. R. China
| | - Bingbing Ding
- grid.28056.390000 0001 2163 4895Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 P. R. China
| | - He Tian
- grid.28056.390000 0001 2163 4895Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 P. R. China
| | - Xiang Ma
- grid.28056.390000 0001 2163 4895Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237 P. R. China
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9
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Han MJ, Kim M, Tsukruk VV. Multivalued Logic for Optical Computing with Photonically Enabled Chiral Bio-organic Structures. ACS NANO 2022; 16:13684-13694. [PMID: 35882006 DOI: 10.1021/acsnano.2c04182] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Photonic bio-organic multiphase structures are suggested here for integrated thin-film electronic nets with multilevel logic elements for multilevel computing via a reconfigurable photonic bandgap of chiral biomaterials. Herein, inspired by an artificial intelligence system with efficient information integration and computing capability, the photonically active dielectric layer of chiral nematic cellulose nanocrystals is combined with printed-in p- and n-type organic semiconductors as a bifunctional logical element. These adaptive logic elements are capable of triggering tailored quantized electrical output signals under light with different photon energy and at the different photonic bandgaps of the active dielectric layer. The bifunctional structures enable complex memory behavior upon repetitive changes of photonic bandgap (controlled by expansion/contraction of chiral nematic pitch) and photon energy (controlled by light absorption wavelength of complementary organic semiconductor layers), exhibiting effectively a reconfigurable ternary logic response. This proof-of-concept bio-assisted multivalued logic structure facilitates an optical computing system for low-power optical information processing integrated with human-machine interfaces.
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Affiliation(s)
- Moon Jong Han
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Minkyu Kim
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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10
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Dong Y, Zhao H, Wang S, Cheng Q, Liu S, Li Y. Multimode Anticounterfeiting Labels Based on a Flexible and Water-Resistant NaGdF 4Yb 3+,Er 3+@Carbon Dots Chiral Fluorescent Cellulose Film. ACS APPLIED MATERIALS & INTERFACES 2022; 14:40313-40321. [PMID: 36002915 DOI: 10.1021/acsami.2c09971] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Advanced fluorescent anticounterfeiting technology has attracted a great deal of attention and inspired researchers to develop reliable fluorescent materials with multimodal luminescence. Herein, hydrophobic NaGdF4:Yb3+,Er3+ nanoparticles with dual-mode luminescence were prepared through a one-step solvothermal method using oleic acid as a chelating agent and octadecene as a solvent. The as-synthesized sample was found to provide both green upconversion luminescence and blue downconversion luminescence at excitation wavelengths of 365 and 980 nm. The structure and composition analysis showed that the as-obtained samples were spherical NaGdF4:Yb3+,Er3+@carbon dots (CDs) with a 14.5 ± 0.2 nm particle size and good dispersity in nonpolar solvents. Subsequently, NaGdF4:Yb3+,Er3+@CDs were coated on a cholesteric nanocellulose film with structural color to prepare multimode circularly polarized fluorescent materials. The prepared composite film is flexible and water-resistant, meaning that it is very suitable for anticounterfeiting labels, not only providing a simple and rapid synthesis method with which to prepare multimode fluorescent materials but also presenting a novel anticounterfeiting technology.
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Affiliation(s)
- Yahui Dong
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Haoran Zhao
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Shipeng Wang
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Qian Cheng
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Shouxin Liu
- Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Yu Li
- College of Science, Northeast Forestry University, Harbin 150040, China
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11
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Bukharina D, Kim M, Han MJ, Tsukruk VV. Cellulose Nanocrystals' Assembly under Ionic Strength Variation: From High Orientation Ordering to a Random Orientation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:6363-6375. [PMID: 35559606 DOI: 10.1021/acs.langmuir.2c00293] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We discuss the effect of the ionic strength and effective charge density on the final structural organization of cellulose nanocrystals (CNCs) after drying suspensions with different ionic strengths in terms of quantitative characteristics of the orientation order, rarely considered to date. We observed that increasing the ionic strength in the initial suspension results in continuous shrinking of the helical pitch length that shifts the photonic band gap to a far UV region from the visible range (from 400 to 250 nm) because of the increase in the helical twisting power from 4 to 6 μm-1 and doubling of the twisting angle between neighboring monolayers from 5.5 to 9°. As our estimation of the Coulombic interactions demonstrates, the reduction of the Debye charge screening length below a critical value of 3 nm results in the loss of the long-range helicoidal order and the transition to a disordered morphology with random packing of nanocrystals. Subsequently, very high orientation ordering with the 2D orientation factor, S, within the range 0.8-0.9, close to the theoretical limit of 1, gradually decreased to a very low value of S = 0.1-0.2, a characteristic of random organization at high ionic strength. We suggest that the loss of the chiral ordering is a result of the reduction of repulsive forces, promoting direct physical contact with the reduced contact area during Brownian motion, combined with increased repulsive Coulombic interactions of nanocrystals at nonparallel local packing. Notably, electrolyte addition enhances chiral interactions to the point where the helical twisting power is too large and the resulting nanocrystal bundles can no longer compactly pack without creating unfavorably large free volume. We propose that the Debye charge screening length in suspensions can be used as a universal parameter for CNCs under different conditions and can be used to assess expected ordering characteristics in the solid films.
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Affiliation(s)
- Daria Bukharina
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Minkyu Kim
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Moon Jong Han
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Vladimir V Tsukruk
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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