摘要：
Human immunoglobulin (HIgG) has gained recognition as a crucial biomarker diagnosing and treating various diseases, particularly in identifying elevated serum levels in conditions like measles and pneumococcal disease. Traditional detection methods, however, are often hindered by inefficiencies, high costs, and potential inaccuracies, underscoring the urgent need for more sensitive, efficient, accurate, and self-calibration methods for HIgG. Here, a novel ZnIn2S4/SnO2 composites was synthesized, featuring uniformly dispersed SnO2 nanoparticles on the flower-like ZnIn2S4 structure, resulting in a type II heterojunction that promotes the separation and transfer of photogenerated carriers. Under optimized conditions, this composite demonstrated remarkable photocurrent enhancements 52 and 195 times greater than that of the individual ZnIn2S4 or SnO2, respectively. A novel dual-mode biosensing platform was subsequently developed, employing the ZnIn2S4/SnO2 composites as both as the photoelectrochemical (PEC) signal generator and antibody carrier. This system utilizes multifunctional CuO NPs with ascorbic acid oxidase-like properties, serving as a secondary antibody label. Upon specific binding to HIgG, a notable decrease in the PEC response occurs due to the catalytic activity of CuO NPs and the antigen-antibody interactions. The introduction of o-phenylenediamine (OPD) further enhances detection by facilitating the formation of a fluorescent substance DHAA. This dual-signal approach yielded excellent linear correlations between both PEC and fluorescence signals and HIgG concentration, achieving low detection limits of 22.5 pg/mL or 8.6 pg/mL. These two signals originated from the same PEC electrode with continuous detection in the absence and presence of OPD, simplifying experimental procedures and enhancing the reliability of detection. The non-toxic, chemically stable ZnIn2S4/SnO2 composites ensures reliable and sensitive detection through photocurrent output after incubation with biomolecules. The integration of nanozyme catalysis, biospecific reactions, and in situ fluorescent products generation promise high selectivity across diverse immunosensing applications.
Human immunoglobulin (HIgG) has gained recognition as a crucial biomarker diagnosing and treating various diseases, particularly in identifying elevated serum levels in conditions like measles and pneumococcal disease. Traditional detection methods, however, are often hindered by inefficiencies, high costs, and potential inaccuracies, underscoring the urgent need for more sensitive, efficient, accurate, and self-calibration methods for HIgG. Here, a novel ZnIn2S4/SnO2 composites was synthesized, featuring uniformly dispersed SnO2 nanoparticles on the flower-like ZnIn2S4 structure, resulting in a type II heterojunction that promotes the separation and transfer of photogenerated carriers. Under optimized conditions, this composite demonstrated remarkable photocurrent enhancements 52 and 195 times greater than that of the individual ZnIn2S4 or SnO2, respectively. A novel dual-mode biosensing platform was subsequently developed, employing the ZnIn2S4/SnO2 composites as both as the photoelectrochemical (PEC) signal generator and antibody carrier. This system utilizes multifunctional CuO NPs with ascorbic acid oxidase-like properties, serving as a secondary antibody label. Upon specific binding to HIgG, a notable decrease in the PEC response occurs due to the catalytic activity of CuO NPs and the antigen-antibody interactions. The introduction of o-phenylenediamine (OPD) further enhances detection by facilitating the formation of a fluorescent substance DHAA. This dual-signal approach yielded excellent linear correlations between both PEC and fluorescence signals and HIgG concentration, achieving low detection limits of 22.5 pg/mL or 8.6 pg/mL. These two signals originated from the same PEC electrode with continuous detection in the absence and presence of OPD, simplifying experimental procedures and enhancing the reliability of detection. The non-toxic, chemically stable ZnIn2S4/SnO2 composites ensures reliable and sensitive detection through photocurrent output after incubation with biomolecules. The integration of nanozyme catalysis, biospecific reactions, and in situ fluorescent products generation promise high selectivity across diverse immunosensing applications.
作者机构：
[Zhou, Yongbo; Yin, Shuang-Feng; Qiu, Renhua; Han, Li-Biao; Zhou, YB; Chen, Lang; Liu, Feng; Su, Lebin] Hunan Univ, Coll Chem & Chem Engn, Adv Catalyt Engn Res Ctr, Minist Educ, Changsha 410082, Peoples R China.;[Dong, JY; Dong, Jianyu] Hunan First Normal Univ, Sch Phys & Chem, Changsha 410205, Peoples R China.;[Li, Chao-Jun; Cheng, Ruofei] McGill Univ, FQRNT Ctr Green Chem & Catalysis, Dept Chem, 801 Sherbrooke St W, Montreal, PQ H3A 0B8, Canada.;[Yin, Shuang-Feng] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Peoples R China.
通讯机构：
[Zhou, YB ; Dong, JY ] H;[Li, CJ ] M;Hunan Univ, Coll Chem & Chem Engn, Adv Catalyt Engn Res Ctr, Minist Educ, Changsha 410082, Peoples R China.;Hunan First Normal Univ, Sch Phys & Chem, Changsha 410205, Peoples R China.;McGill Univ, FQRNT Ctr Green Chem & Catalysis, Dept Chem, 801 Sherbrooke St W, Montreal, PQ H3A 0B8, Canada.
摘要：
Reductive functionalization of aldehydes and ketones is one of the most challenging but ultimately rewarding areas in synthetic chemistry and related sciences. We report a simple and extremely versatile carbonyl reductive functionalization strategy achieving direct, highly selective, and efficient reductive amination, etherification, esterification, and phosphinylation reactions of (hetero)aryl aldehydes and ketones, which are extremely challenging or unattainable to achieve by traditional strategies, using only diphenylphosphine oxide and an inorganic base. It enables modular synthesis of functionally and structurally diverse tertiary amines, ethers, esters, phosphine oxides, etc., as well as related pesticides, drug intermediates, and pharmaceuticals. Compared to phosphorus-mediated name reactions, this strategy firstly transformed C & boxH;O bonds into C-element single bonds. Mechanistically, phosphinates are formed as intermediates, which undergo unconventional nucleophilic substitution at the C atom within their C & horbar;O & horbar;P unit. Thus, this work provides important strides in the field of reductive functionalization of aldehydes/ketones, phosphorus-mediated transformation, and various fundamental reactions.
作者机构：
[Xu, Jiao; Peng, Xianghua; Pan, Xianmin] Hunan Womens Univ, Sch Informat Sci & Engn, Changsha 410004, Peoples R China.;[Tang, Jiao] Hunan Normal Univ, Sch Phys & Elect, Changsha 410081, Peoples R China.;[Peng, Yuxiang] Cent South Univ Forestry & Technol, Inst Math & Phys, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
通讯机构：
[Peng, YX ] C;[Peng, XH ] H;Hunan Womens Univ, Sch Informat Sci & Engn, Changsha 410004, Peoples R China.;Cent South Univ Forestry & Technol, Inst Math & Phys, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
关键词：
group delay;terahertz band;topological protection structure
摘要：
A switchable enhancement group delay in the terahertz band based on a novel sandwich topology protection structure with graphene is proposed in this paper. The notable phase transition of the reflected beam comes from the topological edge-protected mode excited at the sandwich photonic crystal surface, and the non-trivial topology of the photonic crystal allows the structure to be immune against defects and imperfections, which lays the foundation for the enhancement of group delay in the terahertz band. And the introduction of graphene creates favorable conditions for the reversible switching of positive and negative reflection group delay. Moreover, the reflected group delay can also be flexibly and dynamically controlled by the incident angle. The positive and negative reversible switching reflected group delay proposed in the terahertz band greatly reduces the optical transmission loss and significantly increases the transmission efficiency compared with the traditional metal sandwich structure, which provides a feasible idea for the realization of multi-dimensional manipulation of the wavelength and phase of electromagnetic waves in the terahertz band. The novel scheme is expected to provide potential applications in fields such as optical buffers or ultrafast modulators.
作者：
Yao Lu;Qiaohong Yao;Mengdong He;Jiao Xu;Yuxiang Peng
期刊：
Results in Physics,2025年70:108145 ISSN：2211-3797
通讯作者：
Jiao Xu<&wdkj&>Yuxiang Peng
作者机构：
[Yao Lu; Qiaohong Yao; Mengdong He; Yuxiang Peng] Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha 410004, China;[Jiao Xu] School of Information Science and Engineering, Hunan Women’s University, Changsha 410004, China
通讯机构：
[Jiao Xu] S;[Yuxiang Peng] I;School of Information Science and Engineering, Hunan Women’s University, Changsha 410004, China<&wdkj&>Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha 410004, China
关键词：
Reconfigurable group delay;Topological edge state;Phase transitions material
摘要：
We investigate reconfigurable reflected group delay in dual-band of the photonic crystal heterostructure containing phase transitions material Ge 2 Sb 2 Te 5 and graphene in mid-infrared region. The giant phase change of reflected beam derives from the topological edge state excited at the boundary surface of photonic crystal. Meanwhile, the tunable topological edge states can be satisfied by controlling the reversible switching between the crystalline and amorphous states of the Ge 2 Sb 2 Te 5 , which provides a flexible way to achieve configurable group delay in dual-band. Besides, the reflected group delay can be dynamically controlled by controlling Fermi energy, relaxation time of graphene and the incident angle. The reconfigurable reflected group delay in dual-band presented in this paper has the potential to be used in high-efficiency memory for optical pulses and optical delay lines.
We investigate reconfigurable reflected group delay in dual-band of the photonic crystal heterostructure containing phase transitions material Ge 2 Sb 2 Te 5 and graphene in mid-infrared region. The giant phase change of reflected beam derives from the topological edge state excited at the boundary surface of photonic crystal. Meanwhile, the tunable topological edge states can be satisfied by controlling the reversible switching between the crystalline and amorphous states of the Ge 2 Sb 2 Te 5 , which provides a flexible way to achieve configurable group delay in dual-band. Besides, the reflected group delay can be dynamically controlled by controlling Fermi energy, relaxation time of graphene and the incident angle. The reconfigurable reflected group delay in dual-band presented in this paper has the potential to be used in high-efficiency memory for optical pulses and optical delay lines.
摘要：
Let R be a Bezout domain, and let A , B , C E R n x n with ABA = ACA . If AB and CA are group invertible, we prove that AB is similar to CA . Moreover, we have ( AB ) # is similar to ( CA ) # . This generalize the main result of Cao and Li (Group inverses for matrices over a Bezout domain, Electronic J. Linear Algebra , 18 (2009), 600-612).
摘要：
Asequential dual-locked luminescent copper nanoclusters (CuNCs) probe was designed and synthesizedfor the specific imaging and selective killing of tumor cells. This nanoprobe was prepared by first forming a Fe(3+)-coupled tannic acid (TA)-stabilized CuNCs (CuNCs-Fe(III)), which is in quenching state due to the electron transfer between CuNCs and Fe(3+), and then coating a protectable layer of hyaluronic acid (HA) on the surface of CuNCs-Fe(III) to form the final dual-locked nanoprobe (CuNCs-Fe(III)@HA). When the nanoprobe of CuNCs-Fe(III)@HA target enter the tumor cells through CD44-HA receptor, HAase will first digest the HA layer of the nanoprobes, and then, GSH over-expressed in tumor cells will reduce Fe(3+) to Fe(2+), thus restoring the fluorescence emission of CuNCs and at the same time killing the tumor cells with the hydroxyl free radicals (∙OH) produced by the Fenton reaction between Fe(2+) and H(2)O(2). This sequential dual-locked luminescent nanoprobe of CuNCs-Fe(III)@HA has been successfully used for the specific imaging and selective killing of tumor cells.
作者机构：
[Peng, Yu-Xiang; Long, Lin-Wen; Li, Jian-Bo; Wang, Xin-Jun] Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.;[Peng, Yu-Xiang; Li, Jian-Bo; Zhao, Wen-Hua; Jiang, Yang-Yang] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
通讯机构：
[Li, JB ] C;Cent South Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface & Interface Sci & T, Changsha 410004, Peoples R China.
关键词：
Metal nanoparticles;Nonlinear absorption;Nonlinear effects;Optical properties;Quantum communications;Rayleigh scattering
摘要：
We theoretically present a flexible method to obtain dual-channel optical bistability (OB) in a coupled system consisting of a metallic nanoshell (MNS) and a carbon nanotube (CNT) nanomechanical resonator (NR) beyond the dipole approximation. The MNS is made of a metallic core and a dielectric shell. The results show that, the four-wave mixing signal is suppressed significantly due to multipole polarizations in comparison to that in the dipole approximation. Also, the four-wave mixing signal can be enhanced greatly with the exciton-phonon coupling strength g increasing. Especially, bistability phase diagrams plotted show that, for a given shell thickness, it is realizable to achieve one (or two) bistable region(s) by adjusting the pumping intensity (or the MNS-NR distance). In a strong exciton-plasmon coupling regime, OB can be switched from single-channel to dual-channel by only changing the dielectric shell thickness or the metallic core radius. This indicates that the system proposed can behave as a channel-tunable bistable switch. Our findings may have potential applications in various domains such as quantum communication and optical functional devices.
作者机构：
[Liu, Dongbo; Zhang, Zhixu] State Key Lab Subhlth Intervent Technol, Changsha 410128, Hunan, Peoples R China.;[Liu, Dongbo; Zhang, Zhixu] Hunan Agr Univ, Coll Hort, Changsha 410128, Hunan, Peoples R China.;[Qin, Dan] Hunan Agr Univ, Coll Food Sci & Technol, Changsha 410128, Hunan, Peoples R China.;[Guo, Xin] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Hunan, Peoples R China.;[Lin, Haiyan] Natl Res Ctr Engn Technol Utilizat Ingredients Bot, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Guo, X ] C;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Hunan, Peoples R China.
关键词：
Adsorption;Carbon dots;Pb(II);Starch
摘要：
The adsorption removal of lead (Pb) ions has become a crucial area of research due to the potential health hazards associated with Pb contamination. Developing cost-effective adsorbents for the removal of Pb(II) ions is significantly important. Hence, a novel fluorescent starch-based hydrogel (FSH) using starch (ST), cellulose nanofibrils (CN), and carbon dots (CD) was fabricated for simultaneous adsorption and detection of Pb(II). A comprehensive characterization of FSH, including its morphological features, chemical composition, and fluorescence characteristics, was conducted. Notably, FSH exhibited a maximum theoretical adsorption capacity of 265.9 mg/g, which was 13.0 times higher than that of pure ST. Moreover, FSH was employed as a fluorescent sensor for Pb(II) determination, achieving a limit of detection (LOD) of 0.06 μg/L. An analysis was further performed to investigate the adsorption and detection mechanisms of Pb(II) utilizing FSH. This study provides valuable insights into the production of a novel cost-effective ST-based adsorbent for the removal of Pb(II) ions.
The adsorption removal of lead (Pb) ions has become a crucial area of research due to the potential health hazards associated with Pb contamination. Developing cost-effective adsorbents for the removal of Pb(II) ions is significantly important. Hence, a novel fluorescent starch-based hydrogel (FSH) using starch (ST), cellulose nanofibrils (CN), and carbon dots (CD) was fabricated for simultaneous adsorption and detection of Pb(II). A comprehensive characterization of FSH, including its morphological features, chemical composition, and fluorescence characteristics, was conducted. Notably, FSH exhibited a maximum theoretical adsorption capacity of 265.9 mg/g, which was 13.0 times higher than that of pure ST. Moreover, FSH was employed as a fluorescent sensor for Pb(II) determination, achieving a limit of detection (LOD) of 0.06 μg/L. An analysis was further performed to investigate the adsorption and detection mechanisms of Pb(II) utilizing FSH. This study provides valuable insights into the production of a novel cost-effective ST-based adsorbent for the removal of Pb(II) ions.
通讯机构：
[Deng, T ] C;[Li, JS ] H;Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Peoples R China.;Cent South Univ Forestry & Technol, Sch Sci, Inst Appl Chem, Changsha 410004, Hunan, Peoples R China.
摘要：
A novel AIEgen molecular probe (N-3QL) with typical AIE effects, good biocompatibility, lysosome targeting, pH activation, excellent photostability, and high brightness was synthesized using two simple synthetic steps. Spectroscopic and cytotoxicity experiments indicate that N-3QL can not only be used for the dynamic monitoring of cancer cell lysosomes, but also for photodynamic therapy (PDT) ablation of cancer cells.
摘要：
Sb-based materials exhibit considerable potential for sodium-ion storage owing to their high theoretical capacities. However, the bulk properties of Sb-based materials always result in poor cycling and rate performances. To overcome these issues, pyridine-regulated Sb@InSbS3 ultrafine nanoplates loaded on reduced graphene oxides (Sb@InSbS3@rGO) were designed and synthesized. During the synthesis process, pyridine was initially adopted to coordinate with In3+, and uniformly dispersed In2S3 ultrafine nanoplates on reduced graphene oxide were generated after sulfidation. Next, partial In3+ was exchanged with Sb3+, and Sb@InSbS3@rGO was obtained by using the subsequent annealing method. The unique structure of Sb@InSbS3@rGO effectively shortened the transfer path of sodium ions and electrons and provided a high pseudocapacitance. As the anode in sodium-ion batteries, the Sb@InSbS3@rGO electrode demonstrated a significantly higher reversible capacity, better stability (445 mAh<middle dot>g(-1) at 0.1 A<middle dot>g(-1) after 200 cycles and 212 mAh<middle dot>g(-1) at 2 A<middle dot>g(-1) after 1200 cycles), and superior rate (210 mAh<middle dot>g(-1) at 6.4 A<middle dot>g(-1)) than the electrode without pyridine (355 mAh<middle dot>g(-1) at 0.1 A<middle dot>g(-1) after 55 cycles and 109 mAh<middle dot>g(-1) at 2 A<middle dot>g(-1) after 770 cycles). Furthermore, full cells were assembled by using the Sb@InSbS3@rGO as anode and Na3V2(PO4)(3) as cathode, which demonstrated good cycling and rate performances and exhibited promising application prospects. These results indicate that adjusting the microstructure of electrode materials through coordination balance is A<middle dot>good strategy for obtaining high-capacity, high-rate, and long-cycle sodium storage performances.
作者：
Li Wei;Peng Yuxiang;Su Peihao;Li Jianbo;Wang Kaijun;...
期刊：
激光与光电子学进展,2024年61(5):0536001 ISSN：1006-4125
作者机构：
[Li Wei; Peng Yuxiang; Su Peihao; Li Jianbo; Wang Kaijun; Liu Exian; He Mengdong] College of Science, Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, Central South University of Forestry and Technology, Hunan, Changsha, 410004, China;[Liu Jianqiang] College of Science, Jiujiang University, Jiangxi, Jiujiang, 332005, China
摘要：
<jats:title>Abstract</jats:title>
<jats:p>The three-terminal ballistic junction (TBJ) has promising applications in nanoelectronics. We investigate the transport properties of a <jats:italic>α</jats:italic>−<jats:italic>T</jats:italic>
<jats:sub>3</jats:sub>-based TBJ, where two typical configurations are considered, i.e. the A- and Z-TBJ. It is found that both A- and Z-TBJ exhibit transmission anisotropy, and the transmission of the A-TBJ has stronger anisotropy than that of the Z-TBJ. The amplitude of the rectification coefficient is smaller than that of phosphorene TBJ, but larger than that of graphene TBJ. When the symmetrical input is applied, the output voltage curve exhibits symmetric behavior. While in the case of asymmetric input, the symmetric behavior is broken, and the maximum value of the output voltage can reach a positive value. Interestingly, the voltage output shows a dramatic nonlinear response which may be useful for the voltage diode application with a push-pull input voltage. In addition, the heat fluxes of the asymmetric input are much smaller than those of the symmetric input. The maximum value of the heat flux under the symmetric input exceeds twice of that under the asymmetric input. Our results are useful to design nanoelectronic devices based on <jats:italic>α</jats:italic>−<jats:italic>T</jats:italic>
<jats:sub>3</jats:sub> TBJ.</jats:p>
作者机构：
[Ning Zhang] College of Science, Central South University of Forestry and Technology, Changsha 410004, P. R. China;[Dandan Gao; Ziyu Zhuang] Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, P. R. China;Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Xining 810008, P. R. China;College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P.R. China;[Dongdong Li] Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, P. R. China<&wdkj&>Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Xining 810008, P. R. China
通讯机构：
[Dongdong Li] Q;Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, P. R. China<&wdkj&>Key Lab of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Chinese Academy of Sciences, Xining 810008, P. R. China
摘要：
Lithium aluminum layered double hydroxide chlorides (LADH-Cl) have been widely used for lithium extraction from brine. Elevation of the performances of LADH-Cl sorbents urgently requires knowledge of the composition-structure-property relationship of LADH-Cl in lithium extraction applications, but these are still unclear. Herein, combining the phase equilibrium experiments, advanced solid characterization methods, and theoretical calculations, we constructed a cyclic work diagram of LADH-Cl for lithium capture from aqueous solution, where the reversible (de)hydration and (de)intercalation induced phase evolution of LADH-Cl dominates the apparent lithium "adsorption-desorption" behavior. It is found that the real active ingredient in LADH-Cl type lithium sorbents is a dihydrated LADH-Cl with an Al:Li molar ratio varying from 2 to 3. This reversible process indicates an ultimate reversible lithium (de)intercalation capacity of ∼10 mg of Li per g of LADH-Cl. Excessive lithium deintercalation results in the phase structure collapse of dihydrated LADH-Cl to form gibbsite. When interacting with a concentrated LiCl aqueous solution, gibbsite is easily converted into lithium saturated intercalated LADH-Cl phases. By further hydration with a diluted LiCl aqueous solution, this phase again converts to the active dihydrated LADH-Cl. In the whole cyclic progress, lithium ions thermodynamically favor staying in the Al-OH octahedral cavities, but the (de)intercalation of lithium has kinetic factors deriving from the variation of the Al-OH hydroxyl orientation. The present results provide fundamental knowledge for the rational design and application of LADH-Cl type lithium sorbents.
摘要：
<jats:title>Comprehensive Summary</jats:title><jats:p>An alkyl radical initiated cyclization/tandem reaction of alkyl bromides and alkyl electrophiles by using potassium metabisulphite (K<jats:sub>2</jats:sub>S<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>) as a connector is developed for the synthesis of various lactam‐substituted alkyl sulfones. Notably, this process does not require a metal catalyst or metal powder reductant, highlighting its environmentally friendly features. The reaction demonstrates outstanding substrate adaptability and a high tolerance towards diverse functional groups. Furthermore, the biologically active molecules and commercially available drugs with a late‐stage modification are also highly compatible with this transformation. Mechanistic studies revealed that the reaction proceeds through a single‐step process involving intramolecular radical cyclization, "SO<jats:sub>2</jats:sub>" insertion, and external alkyl incorporation.</jats:p><jats:p><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/cjoc202400154-gra-0001.png" xlink:title="image" />
</jats:p>
