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Ko T, Kumar S, Shin S, Seo D, Seo S. Colloidal Quantum Dot Nanolithography: Direct Patterning via Electron Beam Lithography. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2111. [PMID: 37513122 PMCID: PMC10384559 DOI: 10.3390/nano13142111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/18/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023]
Abstract
Micro/nano patterns based on quantum dots (QDs) are of great interest for applications ranging from electronics to photonics to sensing devices for biomedical purposes. Several patterning methods have been developed, but all lack the precision and reproducibility required to fabricate precise, complex patterns of less than one micrometer in size, or require specialized crosslinking ligands, limiting their application. In this study, we present a novel approach to directly pattern QD nanopatterns by electron beam lithography using commercially available colloidal QDs without additional modifications. We have successfully generated reliable dot and line QD patterns with dimensions as small as 140 nm. In addition, we have shown that using a 10 nm SiO2 spacer layer on a 50 nm Au layer substrate can double the fluorescence intensity compared to QDs on the Au layer without SiO2. This method takes advantage of traditional nanolithography without the need for a resist layer.
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Affiliation(s)
- Taewoo Ko
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Samir Kumar
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Sanghoon Shin
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Dongmin Seo
- Department of Electrical Engineering, Semyung University, Jecheon 27136, Republic of Korea
| | - Sungkyu Seo
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
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2
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Recent advances in plasmon-enhanced luminescence for biosensing and bioimaging. Anal Chim Acta 2023; 1254:341086. [PMID: 37005018 DOI: 10.1016/j.aca.2023.341086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 03/10/2023] [Accepted: 03/11/2023] [Indexed: 03/16/2023]
Abstract
Plasmon-enhanced luminescence (PEL) is a unique photophysical phenomenon in which the interaction between luminescent moieties and metal nanostructures results in a marked luminescence enhancement. PEL offers several advantages and has been extensively used to design robust biosensing platforms for luminescence-based detection and diagnostics applications, as well as for the development of many efficient bioimaging platforms, enabling high-contrast non-invasive real-time optical imaging of biological tissues, cells, and organelles with high spatial and temporal resolution. This review summarizes recent progress in the development of various PEL-based biosensors and bioimaging platforms for diverse biological and biomedical applications. Specifically, we comprehensively assessed rationally designed PEL-based biosensors that can efficiently detect biomarkers (proteins and nucleic acids) in point-of-care tests, highlighting significant improvements in the sensing performance upon the integration of PEL. In addition to discussing the merits and demerits of recently developed PEL-based biosensors on substrates or in solutions, we include a brief discussion on integrating PEL-based biosensing platforms into microfluidic devices as a promising multi-responsive detection method. The review also presents comprehensive details about the recent advances in the development of various PEL-based multi-functional (passive targeting, active targeting, and stimuli-responsive) bioimaging probes, highlighting the scope of future improvements in devising robust PEL-based nanosystems to achieve more effective diagnostic and therapeutic insights by enabling imaging-guided therapy.
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Hildebrandt N, Lim M, Kim N, Choi DY, Nam JM. Plasmonic quenching and enhancement: metal-quantum dot nanohybrids for fluorescence biosensing. Chem Commun (Camb) 2023; 59:2352-2380. [PMID: 36727288 DOI: 10.1039/d2cc06178c] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Plasmonic metal nanoparticles and semiconductor quantum dots (QDs) are two of the most widely applied nanomaterials for optical biosensing and bioimaging. While their combination for fluorescence quenching via nanosurface energy transfer (NSET) or Förster resonance energy transfer (FRET) offers powerful ways of tuning and amplifying optical signals and is relatively common, metal-QD nanohybrids for plasmon-enhanced fluorescence (PEF) have been much less prevalent. A major reason is the competition between fluorescence quenching and enhancement, which poses important challenges for optimizing distances, orientations, and spectral overlap toward maximum PEF. In this feature article, we discuss the interplay of the different quenching and enhancement mechanisms (a mixed distance dependence of quenching and enhancement - "quenchancement") to better understand the obstacles that must be overcome for the development of metal-QD nanohybrid-based PEF biosensors. The different nanomaterials, their combination within various surface and solution based design concepts, and their structural and photophysical characterization are reviewed and applications toward advanced optical biosensing and bioimaging are presented along with guidelines and future perspectives for sensitive, selective, and versatile bioanalytical research and biomolecular diagnostics with metal-QD nanohybrids.
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Affiliation(s)
- Niko Hildebrandt
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea.
| | - Mihye Lim
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea.
| | - Namjun Kim
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea.
| | - Da Yeon Choi
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea.
| | - Jwa-Min Nam
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea.
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4
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Huang R, Xu Y, Du J, Guan Q, Cai X, Li F, Wang J, Chen W. A fluorescent sensor based on the cascade signal amplification strategy for ultra-sensitive detection of Cu 2. NANOSCALE 2023; 15:1806-1812. [PMID: 36602100 DOI: 10.1039/d2nr06539h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Copper is an essential element in the human body, participating in various physiological activities in the bodies of organisms. However, an excessive load of Cu2+ is associated with several neurodegenerative diseases and prion diseases, also identified as a symptom of Wilson's disease (WD). A straightforward, rapid, sensitive, and specific copper sensor is highly required but remains a challenge. In this study, guided by the simulation, we developed a chemical sensor using a cascade signal amplification strategy based on the Cu-catalyzed click reaction, combined with a fluorescence-enhanced substrate with gold nanorods coupled with silver nanoislands. The sensor can selectively detect Cu2+ as low as 3.87 nM within 10 min. We have demonstrated that this method can be directly employed for WD diagnosis in urine samples. In addition, using antibiotic susceptibility testing (AST) as an example, we verify whether this assay can be adapted to other targets where Cu is designed as an indirect indicator.
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Affiliation(s)
- Ruijia Huang
- Medical Research Center, Huazhong University of Science and Technology Union Shenzhen Hospital, the 6th Affiliated Hospital, Shenzhen University Medical School, Shenzhen 518052, P. R. China.
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, P. R. China.
| | - Ying Xu
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, P. R. China.
| | - Jihui Du
- Medical Research Center, Huazhong University of Science and Technology Union Shenzhen Hospital, the 6th Affiliated Hospital, Shenzhen University Medical School, Shenzhen 518052, P. R. China.
| | - Qiong Guan
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, P. R. China.
| | - Xiaoqing Cai
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, P. R. China.
| | - Feng Li
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, P. R. China.
| | - Jidong Wang
- Medical Research Center, Huazhong University of Science and Technology Union Shenzhen Hospital, the 6th Affiliated Hospital, Shenzhen University Medical School, Shenzhen 518052, P. R. China.
| | - Wenwen Chen
- School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen 518060, P. R. China.
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5
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Partnered Excited-State Intermolecular Proton Transfer Fluorescence (P-ESIPT) Signaling for Nitrate Sensing and High-Resolution Cell-Imaging. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27165164. [PMID: 36014404 PMCID: PMC9416243 DOI: 10.3390/molecules27165164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/24/2022] [Accepted: 07/28/2022] [Indexed: 11/17/2022]
Abstract
Nitrite (NO2−) is a common pollutant and is widely present in the environment and in human bodies. The development of a rapid and accurate method for NO2− detection is always a very important task. Herein, we synthesized a partnered excited-state intermolecular proton transfer (ESIPT) fluorophore using the “multi-component one pot” method, and used this as a probe (ESIPT-F) for sensing NO2−. ESIPT-F exhibited bimodal emission in different solvents because of the solvent-mediated ESIPT reaction. The addition of NO2− caused an obvious change in colors and tautomeric fluorescence due to the graft of NO2− into the ESIPT-F molecules. From this basis, highly sensitive and selective analysis of NO2− was developed using tautomeric emission signaling, achieving sensitive detection of NO2− in the concentration range of 0~45 mM with a detection limit of 12.5 nM. More importantly, ESIPT-F showed the ability to anchor proteins and resulted in a recognition-driven “on-off” ESIPT process, enabling it to become a powerful tool for fluorescence imaging of proteins or protein-based subcellular organelles. MTT experimental results revealed that ESIPT-F is low cytotoxic and has good membrane permeability to cells. Thus, ESIPT-F was further employed to image the tunneling nanotube in vitro HEC-1A cells, displaying high-resolution performance.
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pH-switchable nanozyme cascade catalysis: a strategy for spatial-temporal modulation of pathological wound microenvironment to rescue stalled healing in diabetic ulcer. J Nanobiotechnology 2022; 20:12. [PMID: 34983560 PMCID: PMC8725300 DOI: 10.1186/s12951-021-01215-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 12/16/2021] [Indexed: 12/15/2022] Open
Abstract
The management of diabetic ulcer (DU) to rescue stalled wound healing remains a paramount clinical challenge due to the spatially and temporally coupled pathological wound microenvironment that features hyperglycemia, biofilm infection, hypoxia and excessive oxidative stress. Here we present a pH-switchable nanozyme cascade catalysis (PNCC) strategy for spatial–temporal modulation of pathological wound microenvironment to rescue stalled healing in DU. The PNCC is demonstrated by employing the nanozyme of clinically approved iron oxide nanoparticles coated with a shell of glucose oxidase (Fe3O4-GOx). The Fe3O4-GOx possesses intrinsic glucose oxidase (GOx), catalase (CAT) and peroxidase (POD)-like activities, and can catalyze pH-switchable glucose-initiated GOx/POD and GOx/CAT cascade reaction in acidic and neutral environment, respectively. Specifically, the GOx/POD cascade reaction generating consecutive fluxes of toxic hydroxyl radical spatially targets the acidic biofilm (pH ~ 5.5), and eradicates biofilm to shorten the inflammatory phase and initiate normal wound healing processes. Furthermore, the GOx/CAT cascade reaction producing consecutive fluxes of oxygen spatially targets the neutral wound tissue, and accelerates the proliferation and remodeling phases of wound healing by addressing the issues of hyperglycemia, hypoxia, and excessive oxidative stress. The shortened inflammatory phase temporally coupled with accelerated proliferation and remodeling phases significantly speed up the normal orchestrated wound-healing cascades. Remarkably, this Fe3O4-GOx-instructed spatial–temporal remodeling of DU microenvironment enables complete re-epithelialization of biofilm-infected wound in diabetic mice within 15 days while minimizing toxicity to normal tissues, exerting great transformation potential in clinical DU management. The proposed PNCC concept offers a new perspective for complex pathological microenvironment remodeling, and may provide a powerful modality for the treatment of microenvironment-associated diseases. ![]()
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Wang M, Wang M, Zheng G, Dai Z, Ma Y. Recent progress in sensing application of metal nanoarchitecture-enhanced fluorescence. NANOSCALE ADVANCES 2021; 3:2448-2465. [PMID: 36134167 PMCID: PMC9417471 DOI: 10.1039/d0na01050b] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/13/2021] [Indexed: 05/21/2023]
Abstract
Fluorescence analytical methods, as real time and in situ analytical approaches to target analytes, can offer advantages of high sensitivity/selectivity, great versatility, non-invasive measurement and easy transmission over long distances. However, the conventional fluorescence assay still suffers from low specificity, insufficient sensitivity, poor reliability and false-positive responses. By exploiting various metal nanoarchitectures to manipulate fluorescence, both increased fluorescence quantum yield and improved photostability can be realized. This metal nanoarchitecture-enhanced fluorescence (MEF) phenomenon has been extensively studied and used in various sensors over the past years, which greatly improved their sensing performance. Thus in this review, we primarily give a general overview of MEF based sensors from mechanisms to state-of-the-art applications in environmental assays, biological/medical analysis and diagnosis areas. Finally, their pros and cons as well as further development directions are also discussed.
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Affiliation(s)
- Meiling Wang
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
| | - Min Wang
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
| | - Ganhong Zheng
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
| | - Zhenxiang Dai
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
| | - Yongqing Ma
- Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University Hefei 230039 China
- Institute of Physical Science and Information Technology, Anhui University Hefei 230039 China
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8
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Meng Z, Bi J, Zhang Q, Ren H, Qin W. Recent advances in nanomaterial-assisted detection coupled with capillary and microchip electrophoresis. Electrophoresis 2020; 42:269-278. [PMID: 33159339 DOI: 10.1002/elps.202000293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 11/08/2022]
Abstract
Nanomaterials have drawn much attention because of their unique properties enabling them to play important roles in various applications in different areas. This review covers literature data in the Web of Science from January 2017 to August 2020, focusing on the applications of nanomaterials (nanoparticles, quantum dots, nanotubes, and graphene) in CE and MCE to achieve enhanced sensitivity of several detection techniques: fluorescence, colorimetry, amperometry, and chemiluminescence /electrochemiluminescence. For the articles surveyed, the types of nanomaterials used, detection mechanisms, analytical performance, and applications are presented and discussed.
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Affiliation(s)
- Zhao Meng
- College of Chemistry, Beijing Normal University, Beijing, P. R. China
| | - Junmin Bi
- College of Chemistry, Beijing Normal University, Beijing, P. R. China
| | - Qianqian Zhang
- College of Chemistry, Beijing Normal University, Beijing, P. R. China
| | - Hang Ren
- College of Chemistry, Beijing Normal University, Beijing, P. R. China
| | - Weidong Qin
- College of Chemistry, Beijing Normal University, Beijing, P. R. China
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9
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Wang T, Cheng Y, Zhang Y, Zha J, Ye J, Chu Q, Cheng G. β-cyclodextrin modified quantum dots as pseudo-stationary phase for direct enantioseparation based on capillary electrophoresis with laser-induced fluorescence detection. Talanta 2019; 210:120629. [PMID: 31987180 DOI: 10.1016/j.talanta.2019.120629] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/02/2019] [Accepted: 12/07/2019] [Indexed: 12/12/2022]
Abstract
In recent years, quantum dots (QDs) have attracted a tremendous amount of attention due to their compelling features. In this work, a kind of composite QDs based on β-cyclodextrin (β-CD) and its derivatives modification was prepared, and for the first time utilized to separate and determine enantiomers in the combined system of capillary electrophoresis with laser-induced fluorescence detection (CE-LIF). By taking advantages of the inclusion complexation of β-CD and the fluorescence property of QD core, the composite QDs were added into the running buffer as pseudo-stationary phase. The resultant CE-LIF method accomplished enantioseparation for six groups of model analytes without need of capillary preparation and analyte derivatization. The effects of composite QDs concentration, the pH value and concentration of the running buffer on resolution have been investigated individually. The RSDs of interday and intraday repeatability were in the range of 2.7-8.1%, 0.7-3.9%, and 1.5-3.8% for the peak area, migration time and resolution, respectively. The theoretical calculation results of the binding energies and binding constant further validated the interaction mechanism of composite QDs and target analytes. Furthermore, this developed method was successfully applied to the analysis of the active components (catechin and epicatechin) in Chinese herb Catechu, and the recoveries were in the range of 92.2-108%. The experimental results suggested that the preparation strategy of the composite QDs is appropriate for enantioseparation of more enantiomers by adjusting the modifiers on the surface of QDs, which is particularly promising for electrophoretic enantioseparation based on fluorescence detection, especially for those analytes lacking proper derivative functional groups.
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Affiliation(s)
- Tingting Wang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Yuhuan Cheng
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Yulian Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Jinyin Zha
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Jiannong Ye
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Qingcui Chu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China.
| | - Guifang Cheng
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
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10
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Ha M, Kim JH, You M, Li Q, Fan C, Nam JM. Multicomponent Plasmonic Nanoparticles: From Heterostructured Nanoparticles to Colloidal Composite Nanostructures. Chem Rev 2019; 119:12208-12278. [PMID: 31794202 DOI: 10.1021/acs.chemrev.9b00234] [Citation(s) in RCA: 177] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Plasmonic nanostructures possessing unique and versatile optoelectronic properties have been vastly investigated over the past decade. However, the full potential of plasmonic nanostructure has not yet been fully exploited, particularly with single-component homogeneous structures with monotonic properties, and the addition of new components for making multicomponent nanoparticles may lead to new-yet-unexpected or improved properties. Here we define the term "multi-component nanoparticles" as hybrid structures composed of two or more condensed nanoscale domains with distinctive material compositions, shapes, or sizes. We reviewed and discussed the designing principles and synthetic strategies to efficiently combine multiple components to form hybrid nanoparticles with a new or improved plasmonic functionality. In particular, it has been quite challenging to precisely synthesize widely diverse multicomponent plasmonic structures, limiting realization of the full potential of plasmonic heterostructures. To address this challenge, several synthetic approaches have been reported to form a variety of different multicomponent plasmonic nanoparticles, mainly based on heterogeneous nucleation, atomic replacements, adsorption on supports, and biomolecule-mediated assemblies. In addition, the unique and synergistic features of multicomponent plasmonic nanoparticles, such as combination of pristine material properties, finely tuned plasmon resonance and coupling, enhanced light-matter interactions, geometry-induced polarization, and plasmon-induced energy and charge transfer across the heterointerface, were reported. In this review, we comprehensively summarize the latest advances on state-of-art synthetic strategies, unique properties, and promising applications of multicomponent plasmonic nanoparticles. These plasmonic nanoparticles including heterostructured nanoparticles and composite nanostructures are prepared by direct synthesis and physical force- or biomolecule-mediated assembly, which hold tremendous potential for plasmon-mediated energy transfer, magnetic plasmonics, metamolecules, and nanobiotechnology.
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Affiliation(s)
- Minji Ha
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
| | - Jae-Ho Kim
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
| | - Myunghwa You
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
| | - Qian Li
- School of Chemistry and Chemical Engineering, and Institute of Molecular Medicine, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, and Institute of Molecular Medicine, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Jwa-Min Nam
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
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11
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Mansour AS, Betiha M, Alrowaili Z, Abubshait S, Negm N. A facile synthetic approach and optical properties of AuNPs/CdSe tetrapod and AuNPs/CdSe@rGO nanocomposites. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111493] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Mou XZ, Chen XY, Wang J, Zhang Z, Yang Y, Shou ZX, Tu YX, Du X, Wu C, Zhao Y, Qiu L, Jiang P, Chen C, Huang DS, Li YQ. Bacteria-Instructed Click Chemistry between Functionalized Gold Nanoparticles for Point-of-Care Microbial Detection. ACS APPLIED MATERIALS & INTERFACES 2019; 11:23093-23101. [PMID: 31184853 DOI: 10.1021/acsami.9b09279] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Bacterial infections pose mounting public health concerns and cause an enormous medical and financial burden today. Rapid and sensitive detection of pathogenic bacteria at the point of care (POC) remains a paramount challenge. Here, we report a novel concept of bacteria-instructed click chemistry and employ it for POC microbial sensing. In this concept of bacteria-instructed click chemistry, we demonstrate for the first time that pathogenic bacteria can capture and reduce exogenous Cu2+ to Cu+ by leveraging their unique metabolic processes. The produced Cu+ subsequently acts as a catalyst to trigger the click reaction between gold nanoparticles (AuNPs) modified with azide and alkyne functional molecules, resulting in the aggregation of nanoparticles with a color change of the solution from red to blue. In this process, signal amplification from click chemistry is complied with the aggregation of functionalized AuNPs, thus presenting a robust colorimetric strategy for sensitive POC sensing of pathogenic bacteria. Notably, this colorimetric strategy is easily integrated in a smartphone app as a portable platform to achieve one-click detection in a mobile way. Moreover, with the help of the magnetic preseparation process, this smartphone app-assisted platform enables rapid (within 1 h) detection of Escherichia coli with high sensitivity (40 colony-forming units/mL) in the complex artificial sepsis blood samples, showing great potential for clinical early diagnosis of bacterial infections.
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Affiliation(s)
- Xiao-Zhou Mou
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province , Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College) , Hangzhou 310014 , China
| | - Xiao-Yi Chen
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province , Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College) , Hangzhou 310014 , China
| | - Jianhao Wang
- School of Pharmaceutical Engineering and Life Science , Changzhou University , Changzhou 213164 , China
| | - Zhaotian Zhang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Soochow University , Suzhou 215123 , China
| | - Yanmei Yang
- College of Chemistry, Chemical Engineering and Materials Science , Shandong Normal University , Jinan 250014 , China
| | - Zhang-Xuan Shou
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province , Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College) , Hangzhou 310014 , China
| | - Yue-Xing Tu
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province , Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College) , Hangzhou 310014 , China
| | - Xuancheng Du
- School of Pharmaceutical Engineering and Life Science , Changzhou University , Changzhou 213164 , China
| | - Chun Wu
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Soochow University , Suzhou 215123 , China
| | - Yuan Zhao
- School of Pharmaceutical Engineering and Life Science , Changzhou University , Changzhou 213164 , China
| | - Lin Qiu
- School of Pharmaceutical Engineering and Life Science , Changzhou University , Changzhou 213164 , China
| | - Pengju Jiang
- School of Pharmaceutical Engineering and Life Science , Changzhou University , Changzhou 213164 , China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety , National Center for Nanoscience and Technology of China , Beijing 100190 , China
| | - Dong-Sheng Huang
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province , Zhejiang Provincial People's Hospital (People's Hospital of Hangzhou Medical College) , Hangzhou 310014 , China
| | - Yong-Qiang Li
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions , Soochow University , Suzhou 215123 , China
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13
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Liu C, Liu Y, Deng H, Tang S, Cao YC. High quantum yield and well-dispersed quantum dots luminescent composite through sodium carboxymethyl starch. LUMINESCENCE 2019; 34:200-204. [PMID: 30680910 DOI: 10.1002/bio.3594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 12/16/2018] [Accepted: 12/23/2018] [Indexed: 11/07/2022]
Abstract
It is a challenging task to prepare well-dispersed and highly luminescent quantum dots (QDs) powder and a new strategy is reported in this article. Sodium carboxymethyl starch (CMS-Na) was employed in this work to prepare the QDs-starch composite. Ultraviolet (UV) light shows that the blank starches had no fluorescence, while the QDs-starches were highly luminescent. Scanning electron microscopy (SEM) observation shows that the QDs-starch composite has the typical particle morphology with the diameter around 200 nm. Energy dispersive X-ray spectroscopy (EDX) results show that there are intensive tellurium (Te) and cadmium (Cd) element signals. Combined fluorescent lifetime and steady-state spectrometer show that the QDs-starch quantum yields (QYs) increase when the QDs loading increases from 1 × 10-6 mol/g to 2 × 10-6 mol/g, but when the loadings further increase, the QYs decrease slightly. For the red colour (λem = 660 nm) QDs, the QYs can reach to as high as 28.2%, and for the other colour QDs they can also have the QYs above 22%. Time-resolved photobleaching experiments show that the fluorescent QDs-starch composite has a half-decay time of 40.23 s. These results indicate that the CMS-Na is a promising QDs dispersant to obtain high QY QD composites.
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Affiliation(s)
- Cui Liu
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan, P. R. China
| | - Yang Liu
- State Grid Hegang Electric Power Supply Company, Hegang, P. R. China
| | - Heming Deng
- State Grid Electric Power Research Institute, Wuhan, P. R. China
| | - Shun Tang
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan, P. R. China
| | - Yuan-Cheng Cao
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, P. R. China
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14
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Babamiri B, Hallaj R, Salimi A. Solid surface fluorescence immunosensor for ultrasensitive detection of hepatitis B virus surface antigen using PAMAM/CdTe@CdS QDs nanoclusters. Methods Appl Fluoresc 2018; 6:035013. [PMID: 29848807 DOI: 10.1088/2050-6120/aac8f7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In the present study, we constructed an ultrasensitive solid surface fluorescence-immunosensor based on highly luminescent CdTe@CdS-PAMAM structures as nanoprobe for determination of HBsAg by monitoring fluorescence intensity. This strategy was achieved by using PAMAM as a signal amplifier; the PAMAM dendrimer with the many functional amine groups can amplify the fluorescence signal of QDs by covalent attachment of CdTe@CdS on PAMAM and hence, improve the sensitivity of the proposed method significantly. A sandwich type immunosensor was formed after the addition of HBsAg and the PAMAM-QD-Ab2, respectively. Under optimal conditions, the designed immunosensor demonstrates a good analytical performance for the HBsAg detection in an excellent linear range from 5 fg ml-1 to 0.15 ng ml-1 with the detection limit (LOD) of 0.6 fg ml-1 at a S/N ratio of 3. In addition, the analysis of human serum samples shows that the fluorescent immunoassay has the great potential for early diagnosis of hepatitis B and can be used for the detection of other tumor markers in clinical applications.
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Affiliation(s)
- Bahareh Babamiri
- Department of Chemistry, University of Kurdistan, 66177-15175, Sanandaj, Iran
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15
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Hawa G, Sonnleitner L, Missbichler A, Prinz A, Bauer G, Mauracher C. Single step, direct fluorescence immunoassays based on metal enhanced fluorescence (MEF-FIA) applicable as micro plate-, array-, multiplexing- or point of care-format. Anal Biochem 2018. [DOI: 10.1016/j.ab.2018.03.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Adam V, Vaculovicova M. CE and nanomaterials - Part II: Nanomaterials in CE. Electrophoresis 2017; 38:2405-2430. [DOI: 10.1002/elps.201700098] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 07/04/2017] [Accepted: 07/05/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Vojtech Adam
- Department of Chemistry and Biochemistry; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Marketa Vaculovicova
- Department of Chemistry and Biochemistry; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
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17
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Huang X, Liu Y, Yung B, Xiong Y, Chen X. Nanotechnology-Enhanced No-Wash Biosensors for in Vitro Diagnostics of Cancer. ACS NANO 2017; 11:5238-5292. [PMID: 28590117 DOI: 10.1021/acsnano.7b02618] [Citation(s) in RCA: 145] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
In vitro biosensors have been an integral component for early diagnosis of cancer in the clinic. Among them, no-wash biosensors, which only depend on the simple mixing of the signal generating probes and the sample solution without additional washing and separation steps, have been found to be particularly attractive. The outstanding advantages of facile, convenient, and rapid response of no-wash biosensors are especially suitable for point-of-care testing (POCT). One fast-growing field of no-wash biosensor design involves the usage of nanomaterials as signal amplification carriers or direct signal generating elements. The analytical capacity of no-wash biosensors with respect to sensitivity or limit of detection, specificity, stability, and multiplexing detection capacity is largely improved because of their large surface area, excellent optical, electrical, catalytic, and magnetic properties. This review provides a comprehensive overview of various nanomaterial-enhanced no-wash biosensing technologies and focuses on the analysis of the underlying mechanism of these technologies applied for the early detection of cancer biomarkers ranging from small molecules to proteins, and even whole cancerous cells. Representative examples are selected to demonstrate the proof-of-concept with promising applications for in vitro diagnostics of cancer. Finally, a brief discussion of common unresolved issues and a perspective outlook on the field are provided.
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Affiliation(s)
- Xiaolin Huang
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, P. R. China
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH) , Bethesda, Maryland 20892, United States
| | - Yijing Liu
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH) , Bethesda, Maryland 20892, United States
| | - Bryant Yung
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH) , Bethesda, Maryland 20892, United States
| | - Yonghua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, P. R. China
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH) , Bethesda, Maryland 20892, United States
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18
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Chen G, Wang D, Hong W, Sun L, Zhu Y, Chen X. Fluorescence Enhancement on Large Area Self-Assembled Plasmonic-3D Photonic Crystals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1602612. [PMID: 28054428 DOI: 10.1002/smll.201602612] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 11/22/2016] [Indexed: 05/29/2023]
Abstract
Discontinuous plasmonic-3D photonic crystal hybrid structures are fabricated in order to evaluate the coupling effect of surface plasmon resonance and the photonic stop band. The nanostructures are prepared by silver sputtering deposition on top of hydrophobic 3D photonic crystals. The localized surface plasmon resonance of the nanostructure has a symbiotic relationship with the 3D photonic stop band, leading to highly tunable characteristics. Fluorescence enhancements of conjugated polymer and quantum dot based on these hybrid structures are studied. The maximum fluorescence enhancement for the conjugated polymer of poly(5-methoxy-2-(3-sulfopropoxy)-1,4-phenylenevinylene) potassium salt by a factor of 87 is achieved as compared with that on a glass substrate due to the enhanced near-field from the discontinuous plasmonic structures, strong scattering effects from rough metal surface with photonic stop band, and accelerated decay rates from metal-coupled excited state of the fluorophore. It is demonstrated that the enhancement induced by the hybrid structures has a larger effective distance (optimum thickness ≈130 nm) than conventional plasmonic systems. It is expected that this approach has tremendous potential in the field of sensors, fluorescence-imaging, and optoelectronic applications.
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Affiliation(s)
- Guojian Chen
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Dongzhu Wang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Wei Hong
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Lu Sun
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yongxiang Zhu
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Xudong Chen
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
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19
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Mei Z, Tang L. Surface-Plasmon-Coupled Fluorescence Enhancement Based on Ordered Gold Nanorod Array Biochip for Ultrasensitive DNA Analysis. Anal Chem 2016; 89:633-639. [PMID: 27991768 DOI: 10.1021/acs.analchem.6b02797] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
An innovative gold nanorod (GNR) array biochip was developed to systematically investigate the localized surface plasmon resonance (LSPR)-coupled fluorescence enhancement for signal amplification in molecular beacon detection. An ordered GNR assembly in vertical standing array on a glass surface was fabricated as plasmonic substrates, resulting in dramatically intensified LSPR between adjacent nanoparticles as compared to that from an ensemble of random nanorods. We have shown that the plasmonic response of the nanoarray can be tuned by the proper choice of GNR size to overlap the fluorophore excitation and emission wavelengths greater than 600 nm. Plasmon-induced fluorescence enhancement was found to be distance-dependent with the competition between quenching and enhancement by the metal nanostructures. The augmented fluorescence enhancement by the GNR array can efficiently overcome the quenching effect of the gold nanoparticle even at close proximity. The enhancement correlates with the spectral overlap between the fluorophore excitation/emission and the plasmonic resonance of the GNR array, indicating a surface-plasmon-enhanced excitation and radiative mechanism for the amplification. From these results, the applicability of the ordered GNR array chip was extended to molecular fluorescence enhancement for practical use as a highly functional and ultrasensitive plasmonic DNA biochip in molecular beacon fashion.
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Affiliation(s)
- Zhong Mei
- Department of Biomedical Engineering, University of Texas at San Antonio , San Antonio, Texas 78249, United States
| | - Liang Tang
- Department of Biomedical Engineering, University of Texas at San Antonio , San Antonio, Texas 78249, United States
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20
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Electrosteric stabilization of colloidal TiO2 nanoparticles with DNA and polyethylene glycol for selective enhancement of UV detection sensitivity in capillary electrophoresis analysis. Anal Bioanal Chem 2016; 409:1857-1868. [DOI: 10.1007/s00216-016-0130-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/25/2016] [Accepted: 12/02/2016] [Indexed: 11/26/2022]
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21
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Hong M, Xu L, Xue Q, Li L, Tang B. Fluorescence Imaging of Intracellular Telomerase Activity Using Enzyme-Free Signal Amplification. Anal Chem 2016; 88:12177-12182. [DOI: 10.1021/acs.analchem.6b03108] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Min Hong
- College
of Chemistry, Chemical Engineering and Materials Science, Collaborative
Innovation Center of Functionalized Probes for Chemical Imaging in
Universities of Shandong, Key Laboratory of Molecular and Nano Probes,
Ministry of Education, Shandong Normal University, Jinan, 250014, People’s Republic of China
- School
of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People’s Republic of China
| | - Lidan Xu
- School
of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People’s Republic of China
| | - Qingwang Xue
- School
of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People’s Republic of China
| | - Lu Li
- College
of Chemistry, Chemical Engineering and Materials Science, Collaborative
Innovation Center of Functionalized Probes for Chemical Imaging in
Universities of Shandong, Key Laboratory of Molecular and Nano Probes,
Ministry of Education, Shandong Normal University, Jinan, 250014, People’s Republic of China
| | - Bo Tang
- College
of Chemistry, Chemical Engineering and Materials Science, Collaborative
Innovation Center of Functionalized Probes for Chemical Imaging in
Universities of Shandong, Key Laboratory of Molecular and Nano Probes,
Ministry of Education, Shandong Normal University, Jinan, 250014, People’s Republic of China
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22
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Rezaei Z, Ranjbar B. Ultra-sensitive, rapid gold nanoparticle-quantum dot plexcitonic self-assembled aptamer-based nanobiosensor for the detection of human cardiac troponin I. Eng Life Sci 2016; 17:165-174. [PMID: 32624764 DOI: 10.1002/elsc.201500188] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 05/31/2016] [Accepted: 08/01/2016] [Indexed: 12/31/2022] Open
Abstract
Acute myocardial infarction (AMI) is one of the leading causes of death throughout the world. Usual methods for detecting AMI are expensive, time-consuming and using blood samples as biological samples. Therefore, creating an ultra-fast, sensitive and non-invasive diagnostic test is necessary. Herein, a novel ultra-sensitive, fluorescent, plasmon-exciton coupling hybrid of a gold nanoparticle-quantum dot (PQ)-based aptamer nanobiosensor is presented for the detection of human cardiac troponin I (cTnI), the golden biomarker of AMI, and a preclinical test is performed within saliva. The binding of the cTnI protein to aptamer leads to a fluorescence enhancement of the plexcitonic hybrid system. The response range of this nanobiosensor is 0.4-2500 fM and the limit of detection is 0.3 fM. It seems that this novel design of nanobiosensor in the form of the PQ plexcitonic hybrid system can presents new opportunities for nanobiosensor progress.
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Affiliation(s)
- Zahra Rezaei
- Department of Nanobiotechnology Faculty of Biological Sciences Tarbiat Modares University Tehran Iran
| | - Bijan Ranjbar
- Department of Nanobiotechnology and Biophysics Faculty of Biological Sciences Tarbiat Modares University Tehran Iran
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23
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Trapiella-Alfonso L, d’Orlyé F, Varenne A. Recent advances in the development of capillary electrophoresis methodologies for optimizing, controlling, and characterizing the synthesis, functionalization, and physicochemical, properties of nanoparticles. Anal Bioanal Chem 2016; 408:2669-75. [DOI: 10.1007/s00216-015-9236-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/26/2015] [Accepted: 11/30/2015] [Indexed: 12/28/2022]
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24
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Ji X, Wang W, Mattoussi H. Effects of separation distance on the charge transfer interactions in quantum dot-dopamine assemblies. Phys Chem Chem Phys 2016; 17:10108-17. [PMID: 25789996 DOI: 10.1039/c5cp00462d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We explored the effects of changing the separation distance on the charge transfer interactions between luminescent QD and proximal dopamine (in QD-dopamine assemblies), and the ensuing photoluminescence (PL) quenching. The separation distance was controlled using a tunable size bridge between the QD and dopamine via a poly(ethylene glycol) (PEG) chain where the average number of monomers was discretely varied. Using steady-state and time-resolved fluorescence measurements, we found that the photoluminescence losses were substantially more pronounced for QD-dopamine complexes prepared with the shortest PEG bridge, but progressively decreased with increasing PEG size. We also found that the charge transfer interactions can be affected by the nature of the capping ligand used. In particular, we found that interactions and PL quenching in these assemblies tracked the effects of separation distance, conjugate valence and the energy mismatch between the dopamine redox levels and QD energy levels, when a compact zwitterion was used to control the conjugate configuration. However, additional effects of shielding the access of reactive dopamine to amine groups on the QD surface, when a longer inert PEG ligand was used, were found to produce heterogeneous conjugates, alter the interactions and produce weaker PL quenching.
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Affiliation(s)
- Xin Ji
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, Florida 32306, USA.
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25
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Liu YL, Kang N, Ke XB, Wang D, Ren L, Wang HJ. A fluorescent nanoprobe based on metal-enhanced fluorescence combined with Förster resonance energy transfer for the trace detection of nitrite ions. RSC Adv 2016. [DOI: 10.1039/c5ra27622e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Fluorescent nanoprobe utilizing metal enhanced fluorescence (MEF), Förster resonance energy transfer (FRET) and coating with denatured bovine serum albumin (dBSA).
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Affiliation(s)
- Yong-liang Liu
- Department of Biomaterials
- College of Materials
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Ning Kang
- Department of Biomaterials
- College of Materials
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Xue-bin Ke
- Department of Biomaterials
- College of Materials
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Dong Wang
- Department of Biomaterials
- College of Materials
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Lei Ren
- Department of Biomaterials
- College of Materials
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Hong-jun Wang
- Department of Chemistry
- Chemical Biology and Biomedical Engineering
- Stevens Institute of Technology
- Hoboken
- USA
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26
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Wei W, Liu C, Liu J, Liu X, Zou L, Cai S, Shi H, Cao YC. Do the cations in clay and the polymer matrix affect quantum dot fluorescent properties? LUMINESCENCE 2015; 31:1020-4. [PMID: 26663530 DOI: 10.1002/bio.3068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 10/30/2015] [Accepted: 11/05/2015] [Indexed: 01/18/2023]
Abstract
This paper studied the effects of cations and polymer matrix on the fluorescent properties of quantum dots (QDs). The results indicated that temperature has a greater impact on fluorescence intensity than clay cations (mainly K(+) and Na(+) ). Combined fluorescence lifetime and steady-state spectrometer tests showed that QD lifetimes all decreased when the cation concentration was increased, but the quantum yields were steady at various cation concentrations of 0, 0.05, 0.5 and 1 M. Poly(ethylene oxide) (PEO), poly(vinyl alcohol) (PVA) and diepoxy resin were used to study the effects of polymers on QD lifetime and quantum yield. The results showed that the lifetime for QDs 550 nm in PEO and PVA was 17.33 and 17.12 ns, respectively; for the epoxy resin, the lifetime was 0.74 ns, a sharp decrease from 24.47 ns. The quantum yield for QDs 550 nm changed from 34.22% to 7.45% and 7.81% in PEO and PVA, respectively; for the epoxy resin the quantum yield was 2.25%. QDs 580 nm and 620 nm showed the same results as QDs 550 nm. This study provides useful information on the design, synthesis and application of QDs-polymer luminescent materials. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- Wenjun Wei
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China
- Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China
| | - Cui Liu
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China
- Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China
| | - Jiyan Liu
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China
- Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China
| | - Xueqing Liu
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China
- Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China
| | - Linling Zou
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China
- Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China
| | - Shaojun Cai
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China
- Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China
| | - Hong Shi
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China
- Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China
| | - Yuan-Cheng Cao
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Jianghan University), Ministry of Education, Wuhan, 430056, People's Republic of China
- Flexible Display Materials and Technology Co-Innovation Centre of Hubei Province, Jianghan University, Wuhan, 430056, China
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27
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Yao MH, Yang J, Song JT, Zhang L, Fang BY, Zhao DH, Xia RX, Jin RM, Zhao YD, Liu B. An engineered coiled-coil polypeptide assembled onto quantum dots for targeted cell imaging. NANOTECHNOLOGY 2015; 26:495102. [PMID: 26567721 DOI: 10.1088/0957-4484/26/49/495102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Quantum dot (QD)-polypeptide probes have been developed through the specific metal-affinity interaction between polypeptides appended with N-terminal polyhistidine sequences and CdSe/ZnS core-shell QDs. The size and charge of a QD-polypeptide can be tuned by using different coiled-coil polypeptides. Compared to glutathione-capped QDs (QD-GSH), QD-polypeptide probes showed an approximately two- to three-fold luminescence increase, and the luminescence increase was not obviously related to the charge of the polypeptide. QD-polypeptide probes with different charge have a great effect on nonspecific cellular uptake. QD-polypeptide probes with negative charge exhibited lower nonspecific cellular uptake in comparison to the QD-GSH, while positively charged QD-polypeptide probes presented higher cellular uptake than the QD-GSH. A targeted QD-ARGD probe can obviously increase targeted cellular uptake in α v β 3 overexpressing HeLa cells compared to QD-A. In addition, QD-polypeptide probes showed lower in vitro cytotoxicity compared to the original QDs. These results demonstrate that these QD-polypeptide probes with high specific cellular uptake, high fluorescence intensity and low background noise are expected to have great potential applications in targeted cell imaging.
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28
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A sensitive aptasensor for colorimetric detection of adenosine triphosphate based on the protective effect of ATP-aptamer complexes on unmodified gold nanoparticles. Biosens Bioelectron 2015; 78:315-320. [PMID: 26638040 DOI: 10.1016/j.bios.2015.11.043] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 11/13/2015] [Accepted: 11/14/2015] [Indexed: 12/16/2022]
Abstract
Adenosine triphosphate (ATP) is the most direct source of energy in organisms. This study is the first to demonstrate that ATP-aptamer complexes provide greater protection for unmodified gold nanoparticles (AuNPs) against salt-induced aggregation than either aptamer or ATP alone. This protective effect was confirmed using transmission electron microscopy, dynamic light scattering, Zeta potential measurement, and fluorescence polarization techniques. Utilizing controlled particle aggregation/dispersion as a gauge, a sensitive and selective aptasensor for colorimetric detection of ATP was developed using ATP-binding aptamers as the identification element and unmodified AuNPs as the probe. This aptasensor exhibited a good linear relationship between the absorbance and the logarithm concentration of ATP within a 50-1000 nM range. ATP analogs such as guanosine triphosphate, uridine triphosphate and cytidine triphosphate resulted in little or no interference in the determination of ATP.
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29
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Amplified fluorescence detection of DNA based on catalyzed dynamic assembly and host–guest interaction between β-cyclodextrin polymer and pyrene. Talanta 2015; 144:529-34. [DOI: 10.1016/j.talanta.2015.06.087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/25/2015] [Accepted: 06/28/2015] [Indexed: 01/20/2023]
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30
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In situ induced metal-enhanced fluorescence: A new strategy for biosensing the total acetylcholinesterase activity in sub-microliter human whole blood. Biosens Bioelectron 2015; 68:648-653. [DOI: 10.1016/j.bios.2015.01.061] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 01/21/2015] [Accepted: 01/26/2015] [Indexed: 01/02/2023]
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31
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Jia K, Yuan L, Zhou X, Pan L, Wang P, Chen W, Liu X. One-pot synthesis of Au/Ag bimetallic nanoparticles to modulate the emission of CdSe/CdS quantum dots. RSC Adv 2015. [DOI: 10.1039/c5ra08933f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fluorescent emission of CdSe/CdS nanocrystals in colloid solution can be effectively modulated by Au/Ag bimetallic nanoparticles.
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Affiliation(s)
- Kun Jia
- Research Branch of Advanced Functional Materials
- High Temperature Resistant Polymer and Composites Key Laboratory of Sichuan Province
- School of Microelectronics and Solid-State Electronics
- University of Electronic Science and Technology of China
- Chengdu
| | - Liting Yuan
- Research Branch of Advanced Functional Materials
- High Temperature Resistant Polymer and Composites Key Laboratory of Sichuan Province
- School of Microelectronics and Solid-State Electronics
- University of Electronic Science and Technology of China
- Chengdu
| | - Xuefei Zhou
- Research Branch of Advanced Functional Materials
- High Temperature Resistant Polymer and Composites Key Laboratory of Sichuan Province
- School of Microelectronics and Solid-State Electronics
- University of Electronic Science and Technology of China
- Chengdu
| | - Lin Pan
- Research Branch of Advanced Functional Materials
- High Temperature Resistant Polymer and Composites Key Laboratory of Sichuan Province
- School of Microelectronics and Solid-State Electronics
- University of Electronic Science and Technology of China
- Chengdu
| | - Pan Wang
- Research Branch of Advanced Functional Materials
- High Temperature Resistant Polymer and Composites Key Laboratory of Sichuan Province
- School of Microelectronics and Solid-State Electronics
- University of Electronic Science and Technology of China
- Chengdu
| | - Wenjin Chen
- School of Resources and Environment
- University of Electronic Science and Technology of China
- Chengdu
- China
| | - Xiaobo Liu
- Research Branch of Advanced Functional Materials
- High Temperature Resistant Polymer and Composites Key Laboratory of Sichuan Province
- School of Microelectronics and Solid-State Electronics
- University of Electronic Science and Technology of China
- Chengdu
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32
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Rohner C, Tavernaro I, Chen L, Klar PJ, Schlecht S. Metal-enhanced luminescence in colloidal solutions of CdSe and metal nanoparticles: investigation of density dependence and optical band overlap. Phys Chem Chem Phys 2015; 17:5932-41. [DOI: 10.1039/c4cp02347a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The photoluminescence (PL) of semiconductor nanoparticles (SNP) is strongly modified when the semiconductor is in the proximity of a metal surface or a metal nanoparticle (MNP).
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Affiliation(s)
- Christian Rohner
- Institute of Inorganic and Analytical Chemistry
- Justus-Liebig-University Gießen
- 35392 Giessen
- Germany
| | - Isabella Tavernaro
- Institute of Inorganic and Analytical Chemistry
- Justus-Liebig-University Gießen
- 35392 Giessen
- Germany
| | - Limei Chen
- Institute of Experimental Physics I
- Justus-Liebig-University Giessen
- 35392 Gießen
- Germany
| | - Peter J. Klar
- Institute of Experimental Physics I
- Justus-Liebig-University Giessen
- 35392 Gießen
- Germany
| | - Sabine Schlecht
- Institute of Inorganic and Analytical Chemistry
- Justus-Liebig-University Gießen
- 35392 Giessen
- Germany
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33
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Nanomaterials-based optical techniques for the detection of acetylcholinesterase and pesticides. SENSORS 2014; 15:499-514. [PMID: 25558991 PMCID: PMC4327032 DOI: 10.3390/s150100499] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 12/23/2014] [Indexed: 01/09/2023]
Abstract
The large amount of pesticide residues in the environment is a threat to global health by inhibition of acetylcholinesterase (AChE). Biosensors for inhibition of AChE have been thus developed for the detection of pesticides. In line with the rapid development of nanotechnology, nanomaterials have attracted great attention and have been intensively studied in biological analysis due to their unique chemical, physical and size properties. The aim of this review is to provide insight into nanomaterial-based optical techniques for the determination of AChE and pesticides, including colorimetric and fluorescent assays and surface plasmon resonance.
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34
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Yang J, Yao MH, Wen L, Song JT, Zhang MZ, Zhao YD, Liu B. Multifunctional quantum dot-polypeptide hybrid nanogel for targeted imaging and drug delivery. NANOSCALE 2014; 6:11282-11292. [PMID: 25130175 DOI: 10.1039/c4nr03058c] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A new type of multifunctional quantum dot (QD)-polypeptide hybrid nanogel with targeted imaging and drug delivery properties has been developed by metal-affinity driven self-assembly between artificial polypeptides and CdSe-ZnS core-shell QDs. On the surface of QDs, a tunable sandwich-like microstructure consisting of two hydrophobic layers and one hydrophilic layer between them was verified by capillary electrophoresis, transmission electron microscopy, and dynamic light scattering measurements. Hydrophobic and hydrophilic drugs can be simultaneously loaded in a QD-polypeptide nanogel. In vitro drug release of drug-loaded QD-polypeptide nanogels varies strongly with temperature, pH, and competitors. A drug-loaded QD-polypeptide nanogel with an arginine-glycine-aspartic acid (RGD) motif exhibited efficient receptor-mediated endocytosis in αvβ3 overexpressing HeLa cells but not in the control MCF-7 cells as analyzed by confocal microscopy and flow cytometry. In contrast, non-targeted QD-polypeptide nanogels revealed minimal binding and uptake in HeLa cells. Compared with the original QDs, the QD-polypeptide nanogels showed lower in vitro cytotoxicity for both HeLa cells and NIH 3T3 cells. Furthermore, the cytotoxicity of the targeted QD-polypeptide nanogel was lower for normal NIH 3T3 cells than that for HeLa cancer cells. These results demonstrate that the integration of imaging and drug delivery functions in a single QD-polypeptide nanogel has the potential for application in cancer diagnosis, imaging, and therapy.
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Affiliation(s)
- Jie Yang
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
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35
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Stanisavljevic M, Vaculovicova M, Kizek R, Adam V. Capillary electrophoresis of quantum dots: Minireview. Electrophoresis 2014; 35:1929-37. [DOI: 10.1002/elps.201400033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 02/17/2014] [Accepted: 03/13/2014] [Indexed: 12/11/2022]
Affiliation(s)
- Maja Stanisavljevic
- Department of Chemistry and Biochemistry, Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
| | - Marketa Vaculovicova
- Department of Chemistry and Biochemistry, Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry, Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Faculty of Agronomy; Mendel University in Brno; Brno Czech Republic
- Central European Institute of Technology; Brno University of Technology; Brno Czech Republic
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36
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Carcino-embryonic antigen detection based on fluorescence resonance energy transfer between quantum dots and graphene oxide. Biosens Bioelectron 2014; 59:397-403. [PMID: 24768819 DOI: 10.1016/j.bios.2014.04.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 03/20/2014] [Accepted: 04/01/2014] [Indexed: 01/01/2023]
Abstract
The mixture of graphene oxide (GO) and aptamer labeled fluorophore is widely used in developing fluorescent sensors for the analysis of biomolecules, according to the light signal 'off-on' procedure. Moreover, the laser-induced fluorescence-coupled affinity probe capillary electrophoresis (APCE) technique has been broadly applied for the separation of micromolecules. Here, a strategy is proposed for analysis of content of carcino-embryonic antigen (CEA) based on the combination of GO and quantum dots labeling aptamer (QD-aptamer) by capillary electrophoresis (CE). The method has three advantages: (i) combined with CE, only few samples are required and efficiency of separation is high, (ii) fluorescent detection can be carried out after separation of GO and fluorescence probe combined with targets by CE, while fluorescence detection sensitivity had been greatly improved, and (iii) the issues of APCE, including the effect of excess fluorescence probe and maximizing separation between analytes, could be solved by introducing GO. It has been proved that QD-aptamer-CEA complex can completely dissociate from GO. Results show that the fluorescence intensity has a linear relationship with the concentration of CEA in the range from 0.257 to 12.9 ng/mL, and the limit of detection is approximately 5 pg/mL (S/N=3). The proposed method with high specificity has been applied for the accurate analysis of content of CEA in patient׳s serum.
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37
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Zhou Z, Huang H, Chen Y, Liu F, Huang CZ, Li N. A distance-dependent metal-enhanced fluorescence sensing platform based on molecular beacon design. Biosens Bioelectron 2014; 52:367-73. [DOI: 10.1016/j.bios.2013.09.013] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/04/2013] [Accepted: 09/06/2013] [Indexed: 01/06/2023]
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38
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Sang F, Huang X, Ren J. Characterization and separation of semiconductor quantum dots and their conjugates by capillary electrophoresis. Electrophoresis 2014; 35:793-803. [DOI: 10.1002/elps.201300528] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 12/03/2013] [Accepted: 12/03/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Fuming Sang
- School of Marine Science and Technology; Harbin Institute of Technology; Weihai P. R. China
| | - Xiangyi Huang
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai P. R. China
| | - Jicun Ren
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai P. R. China
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39
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Wang M, Niu W, Wu X, Li L, Yang J, Shuang S, Dong C. Fluorescence enhancement detection of uric acid based on water-soluble 3-mercaptopropionic acid-capped core/shell ZnS:Cu/ZnS. RSC Adv 2014. [DOI: 10.1039/c4ra02819h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple core/shell ZnS:Cu/ZnS QD based fluorescence enhancement system is constructed for detecting uric acid. The method with high sensitivity, selectivity and lower toxicity features was applied for determination of UA in real samples.
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Affiliation(s)
- Meihua Wang
- Institute of Environmental Science
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan, China
| | - Weifen Niu
- Institute of Environmental Science
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan, China
| | - Xin Wu
- Institute of Environmental Science
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan, China
| | - Lixia Li
- Institute of Environmental Science
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan, China
| | - Jun Yang
- Institute of Environmental Science
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan, China
| | - Shaomin Shuang
- Institute of Environmental Science
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan, China
| | - Chuan Dong
- Institute of Environmental Science
- College of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan, China
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40
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Shi Y, Jiang S, Zhou K, Wang B, Wang B, Gui Z, Hu Y, Yuen RKK. Facile preparation of ZnS/g-C3N4nanohybrids for enhanced optical properties. RSC Adv 2014. [DOI: 10.1039/c3ra44256j] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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41
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Yi L, Xu X, Lin X, Li H, Ma Y, Lin JM. High-throughput and automatic typing via human papillomavirus identification map for cervical cancer screening and prognosis. Analyst 2014; 139:3330-5. [DOI: 10.1039/c4an00329b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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42
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Saitow KI, Suemori H, Tamamitsu H. Enhancement of fluorescence intensity by silicon particles and its size effect. Chem Commun (Camb) 2014; 50:1137-40. [DOI: 10.1039/c3cc46566g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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43
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Zhang MZ, Yu Y, Yu RN, Wan M, Zhang RY, Zhao YD. Tracking the down-regulation of folate receptor-α in cancer cells through target specific delivery of quantum dots coupled with antisense oligonucleotide and targeted peptide. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:4183-4193. [PMID: 23828664 DOI: 10.1002/smll.201300994] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Indexed: 06/02/2023]
Abstract
Based on the multivalent binding capability of streptavidin (SA) to biotin, a multifunctional quantum dot probe (QD-(AS-ODN+p160)) coupled with antisense oligonucleotide (AS-ODN) and peptide p160 is designed for real-time tracking of targeted delivery of AS-ODN and regulation of folate receptor-α (hFR-α) in MCF-7 breast cancer cells. Fluorescence spectra, capillary electrophoresis (CE) and dynamic light scattering (DLS) are used to characterize the conjugation of AS-ODN and p160 with quantum dots (QDs), DLS results confirm the well stability of the probe in aqueous media. Confocal imaging and quantitative flow cytometry show that QD-(AS-ODN+p160) is able to specifically target human breast cancer MCF-7 cells. Low temperature and ATP depletion treatments reveal the cellular uptake of QD-(AS-ODN+p160) is energy-dependent, and the effects of inhibition agents and co-localization imaging further confirm the endocytic pathway is mainly receptor-mediated. Transmission electron microscopy (TEM) shows the intracellular delivery and endosomal escape of QD probe along with incubation time extended. Two transfection concentrations of QD probe (10 nM and 50 nM) below half inhibitory concentration (IC50 ) value are chosen according to MTT assay. Real-time PCR shows at these two concentration cases the relative mRNA expression levels of hFR-α reduce to 72.5 ± 3.9% and 17.6 ± 1.0%, respectively. However, western blot and quantitative ELISA analysis show the expression level of hFR-α protein has a significant decrease only at 50 nM, indicating that gene silence is concentration-dependent. These results demonstrate that the QD-(AS-ODN+p160) probe not only achieves gene silence in a cell-specific manner but also achieves real-time tracking during AS-ODN intracellular delivery.
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Affiliation(s)
- Ming-Zhen Zhang
- Britton Chance Center for Biomedical Photonics at, Wuhan National Laboratory for Optoelectronics-Hubei, Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology Wuhan 430074, PR China
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44
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Xu JJ, Zhao WW, Song S, Fan C, Chen HY. Functional nanoprobes for ultrasensitive detection of biomolecules: an update. Chem Soc Rev 2013; 43:1601-11. [PMID: 24342982 DOI: 10.1039/c3cs60277j] [Citation(s) in RCA: 171] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
With the rapidly increasing demands for ultrasensitive biodetection, the design and applications of functional nanoprobes have attracted substantial interest for biosensing with optical, electrochemical, and various other means. In particular, given the comparable sizes of nanomaterials and biomolecules, there exists plenty of opportunities to develop functional nanoprobes with biomolecules for highly sensitive and selective biosensing. Over the past decade, numerous nanoprobes have been developed for ultrasensitive bioaffinity sensing of proteins and nucleic acids in both laboratory and clinical applications. In this review, we provide an update on the recent advances in this direction, particularly in the past two years, which reflects new progress since the publication of our last review on the same topic in Chem. Soc. Rev. The types of probes under discussion include: (i) nanoamplifier probes: one nanomaterial loaded with multiple biomolecules; (ii) quantum dots probes: fluorescent nanomaterials with high brightness; (iii) superquenching nanoprobes: fluorescent background suppression; (iv) nanoscale Raman probes: nanoscale surface-enhanced Raman resonance scattering; (v) nanoFETs: nanomaterial-based electrical detection; and (vi) nanoscale enhancers: nanomaterial-induced metal deposition.
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Affiliation(s)
- Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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45
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Sugawa K, Tamura T, Tahara H, Yamaguchi D, Akiyama T, Otsuki J, Kusaka Y, Fukuda N, Ushijima H. Metal-enhanced fluorescence platforms based on plasmonic ordered copper arrays: wavelength dependence of quenching and enhancement effects. ACS NANO 2013; 7:9997-10010. [PMID: 24090528 DOI: 10.1021/nn403925d] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Ordered arrays of copper nanostructures were fabricated and modified with porphyrin molecules in order to evaluate fluorescence enhancement due to the localized surface plasmon resonance. The nanostructures were prepared by thermally depositing copper on the upper hemispheres of two-dimensional silica colloidal crystals. The wavelength at which the surface plasmon resonance of the nanostructures was generated was tuned to a longer wavelength than the interband transition region of copper (>590 nm) by controlling the diameter of the underlying silica particles. Immobilization of porphyrin monolayers onto the nanostructures was achieved via self-assembly of 16-mercaptohexadecanoic acid, which also suppressed the oxidation of the copper surface. The maximum fluorescence enhancement of porphyrin by a factor of 89.2 was achieved as compared with that on a planar Cu plate (CuP) due to the generation of the surface plasmon resonance. Furthermore, it was found that while the fluorescence from the porphyrin was quenched within the interband transition region, it was efficiently enhanced at longer wavelengths. It was demonstrated that the enhancement induced by the proximity of the fluorophore to the nanostructures was enough to overcome the highly efficient quenching effects of the metal. From these results, it is speculated that the surface plasmon resonance of copper has tremendous potential for practical use as high functional plasmonic sensor and devices.
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Affiliation(s)
- Kosuke Sugawa
- Department of Materials and Applied Chemistry, College of Science Technology, Nihon University , Chiyoda, Tokyo 101-8308, Japan
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46
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Lin YJ, Yang JY, Shu TY, Lin TY, Chen YY, Su MY, Li WJ, Liu MY. Detection of C-reactive protein based on magnetic nanoparticles and capillary zone electrophoresis with laser-induced fluorescence detection. J Chromatogr A 2013; 1315:188-94. [DOI: 10.1016/j.chroma.2013.09.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 09/05/2013] [Accepted: 09/12/2013] [Indexed: 10/26/2022]
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47
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Wang J, Jiang P, Qiu L, Wang C, Xia J. Resolving antibody–peptide complexes with different ligand stoichiometries reveals a marked affinity enhancement through multivalency. Talanta 2013; 115:394-400. [DOI: 10.1016/j.talanta.2013.05.070] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 05/25/2013] [Accepted: 05/30/2013] [Indexed: 10/26/2022]
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48
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Ban E, Song EJ. Recent developments and applications of capillary electrophoresis with laser-induced fluorescence detection in biological samples. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 929:180-6. [DOI: 10.1016/j.jchromb.2013.04.028] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 04/18/2013] [Accepted: 04/20/2013] [Indexed: 12/15/2022]
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49
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Zhang X, Kong X, Lv Z, Zhou S, Du X. Bifunctional quantum dot-decorated Ag@SiO2 nanostructures for simultaneous immunoassays of surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF). J Mater Chem B 2013; 1:2198-2204. [DOI: 10.1039/c3tb20069h] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Haldar KK, Sinha G, Lahtinen J, Patra A. Hybrid colloidal Au-CdSe pentapod heterostructures synthesis and their photocatalytic properties. ACS APPLIED MATERIALS & INTERFACES 2012; 4:6266-6272. [PMID: 23113704 DOI: 10.1021/am301859b] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this report, we present a self-driven chemical process to design exclusive Au/CdSe pentapod heterostructures with Au core and CdSe arms. We have analyzed these heterostructures using high-resolution transmission electron microscope (HRTEM), high angle annular dark field-scanning transmission electron microscopic (HAADF-STEM), X-ray diffraction, and X-ray photoelectron spectroscopy (XPS) studies. Microscopic studies suggest that pentapod arms of CdSe are nucleated on the (111) facets of Au and linearly grown only along the [001] direction. From the XPS study, the shifting of peak positions in the higher binding energy region for Au/CdSe heterostructures compared to Au nanoparticles has been found which indicates the charge transfer from CdSe to Au in heterostructures. The steady state and time resolved spectroscopic studies unambiguously confirm the electron transfer from photoexcited CdSe to Au, and the rate of electron transfer is found to be 3.58×10⁸ s⁻¹. It is interesting to note that 87.2% of R6G dye is degraded by the Au/CdSe heterostructures after 150 min UV irradiation, and the apparent rate constant for Au/CdSe heterostructures is found to be 0.013 min⁻¹. This new class of metal-semiconductor heterostructures opens up new possibilities in photocatalytic, solar energy conversion, photovoltaic, and other new emerging applications.
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Affiliation(s)
- Krishna Kanta Haldar
- Department of Materials Science, Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700032, India
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