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Cheng CA, Deng T, Lin FC, Cai Y, Zink JI. Supramolecular Nanomachines as Stimuli-Responsive Gatekeepers on Mesoporous Silica Nanoparticles for Antibiotic and Cancer Drug Delivery. Am J Cancer Res 2019; 9:3341-3364. [PMID: 31244957 PMCID: PMC6567974 DOI: 10.7150/thno.34576] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Accepted: 04/13/2019] [Indexed: 12/19/2022] Open
Abstract
Major objectives in nanomedicine and nanotherapy include the ability to trap therapeutic molecules inside of nano-carriers, carry therapeutics to the site of the disease with no leakage, release high local concentrations of drug, release only on demand - either autonomous or external, and kill the cancer cells or an infectious organism. This review will focus on mesoporous silica nanoparticle carriers (MSN) with a large internal pore volume suitable for carrying anticancer and antibiotic drugs, and supramolecular components that function as caps that can both trap and release the drugs on-command. Caps that are especially relevant to this review are rotaxanes and pseudorotaxanes that consist of a long chain-like molecule threaded through a cyclic molecule. Under certain conditions discussed throughout this review, the cyclic molecule can be attracted to one end of the rotaxane and in the presence of a stimulus can slide to the other end. When the thread is attached near the pore opening on MSNs, the sliding cyclic molecule can block the pore when it is near the particle or open it when it slides away. The design, synthesis and operation of supramolecular systems that act as stimuli-responsive pore capping devices that trap and release molecules for therapeutic or imaging applications are discussed. Uncapping can either be irreversible because the cap comes off, or reversible when the cyclic molecule is prevented from sliding off by a steric barrier. In the latter case the amount of cargo released (the dose) can be controlled. These nanomachines act as valves. Examples of supramolecular systems stimulated by chemical signals (pH, redox, enzymes, antibodies) or by external physical signals (light, heat, magnetism, ultrasound) are presented. Many of the systems have been studied in vitro proving that they are taken up by cancer cells and release drugs and kill the cells when stimulated. Some have been studied in mouse models; after IV injection they shrink tumors or kill intracellular pathogens after stimulation. Supramolecular constructs offer fascinating, highly controllable and biologically compatible platforms for drug delivery.
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Zhao M, Wu W, Su B. pH-Controlled Drug Release by Diffusion through Silica Nanochannel Membranes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:33986-33992. [PMID: 30211527 DOI: 10.1021/acsami.8b12200] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report in this work the fabrication of a flow-through silica nanochannel membrane (SNM) for controlled drug release applications. The ultrathin SNM consists of parallel nanochannels with a uniform diameter of ∼2.3 nm and a density of 4 × 1012 cm-2, which provide simultaneously high permeability and size selectivity toward small molecules. The track-etched porous polyethylene terephthalate film premodified with silane on its surface was used to support the ultrathin SNM via irreversible covalent bond formation, thus offering mechanical strength, flexibility, and stability to the ultrathin SNM for continuous and long-term use. Alkylamines were subsequently grafted onto the SNM surface to modulate the "on" and "off" state of nanochannels by medium pH for controlled drug release. Thiamphenicol glycinate hydrochloride (TPG), an intestinal drug, was studied as a model to permeate through an ultrathin SNM in both simulated gastric fluid (pH = 1.2) and simulated intestinal fluid (pH = 7.5). The release in the latter case was 178 times faster than that in the former. Moreover, a nearly zero-order constant release of TPG via single-file diffusion was achieved up to 24 h, demonstrating the feasibility of sustained and continuous release of small-molecule drugs in a pH-controlled manner.
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Affiliation(s)
- Meijiao Zhao
- Institute of Analytical Chemistry, Department of Chemistry , Zhejiang University , Hangzhou 310058 , China
| | - Wanhao Wu
- Institute of Analytical Chemistry, Department of Chemistry , Zhejiang University , Hangzhou 310058 , China
| | - Bin Su
- Institute of Analytical Chemistry, Department of Chemistry , Zhejiang University , Hangzhou 310058 , China
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3
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Kumar N, Chen W, Cheng CA, Deng T, Wang R, Zink JI. Stimuli-Responsive Nanomachines and Caps for Drug Delivery. Enzymes 2018; 43:31-65. [PMID: 30244808 DOI: 10.1016/bs.enz.2018.07.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this review we focus on methods that are used to trap and release on command therapeutic drugs from mesoporous silica nanoparticles (MSNs). The pores in the MSNs are large enough to accommodate a wide range of cargo molecules such as anticancer and antibiotic drugs and yet small enough to be blocked by a variety of bulky molecules that act as caps. The caps are designed to be tightly attached to the pore openings and trap the cargo molecules without leakage, but upon application of a designed stimulus detach from the nanoparticles and release the cargo. Of special emphasis in this review are nanomachines that respond to stimuli administered from external sources such as light or magnetic fields, or from chemical stimuli produced by the biological system such as a general change in pH or redox potential, or a highly specific chemical produced by a cancer cell or infectious bacterium. The goal is to release a high local concentration of the cargo only where and when it is needed, thus minimizing off-target side effects. We discuss sophisticated reversible nanomachines but also discuss some useful caps that simply break off from the nanoparticles in response to the selected stimulus. Many ingenious systems have been and are being designed; we primarily highlight those that have been demonstrated to operate in vitro and/or in vivo. In most cases the closed MSNs are endocytosed by diseased or infected cells and opened inside the cells to release the drugs. We begin with an overview of the nanoparticles and nanomachines and then present examples of drug release triggered by internal chemical stimuli from the organism and finally by external light and magnetic field stimuli.
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Affiliation(s)
- Navnita Kumar
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, United States
| | - Wei Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, United States
| | - Chi-An Cheng
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, United States
| | - Tian Deng
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, United States
| | - Ruining Wang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, United States
| | - Jeffrey I Zink
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, United States.
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Kumar BVVSP, Sonu KP, Rao KV, Sampath S, George SJ, Eswaramoorthy M. Supramolecular Switching of Ion-Transport in Nanochannels. ACS APPLIED MATERIALS & INTERFACES 2018; 10:23458-23465. [PMID: 29975507 DOI: 10.1021/acsami.8b07098] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Noncovalent approaches to achieve smart ion-transport regulation in artificial nanochannels have garnered significant interest in the recent years because of their advantages over conventional covalent routes. Herein, we demonstrate a simple and generic approach to control the surface charge in mesoporous silica nanochannels by employing π-electron-rich charged motifs (pyranine-based donors) to interact with the surface of mesoporous silica modified with π-electron-deficient motifs (viologen-based acceptors) through a range of noncovalent forces, namely, charge-transfer, electrostatic, and hydrophobic interactions. The extent of each of these interactions was independently controlled by molecular design and pH, while employing them in a synergistic or antagonistic fashion to modulate the binding affinity of the charged motifs. This enabled the precise control of the surface charge of the nanochannels to achieve multiple ion-transport states.
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Affiliation(s)
- B V V S Pavan Kumar
- Nanomaterials and Catalysis lab, Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat) , Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) , Jakkur P.O, Bangalore 560064 , India
| | - K P Sonu
- Nanomaterials and Catalysis lab, Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat) , Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) , Jakkur P.O, Bangalore 560064 , India
| | - K Venkata Rao
- Supramolecular Chemistry Laboratory , New Chemistry Unit, School of Advanced Materials (SAMat), JNCASR , Jakkur P.O, Bangalore 560064 , India
| | - S Sampath
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Subi J George
- Supramolecular Chemistry Laboratory , New Chemistry Unit, School of Advanced Materials (SAMat), JNCASR , Jakkur P.O, Bangalore 560064 , India
| | - M Eswaramoorthy
- Nanomaterials and Catalysis lab, Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat) , Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) , Jakkur P.O, Bangalore 560064 , India
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5
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Zhu X, Wang CQ. pH and redox-operated nanovalve for size-selective cargo delivery on hollow mesoporous silica spheres. J Colloid Interface Sci 2016; 480:39-48. [DOI: 10.1016/j.jcis.2016.06.043] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 06/16/2016] [Accepted: 06/17/2016] [Indexed: 11/25/2022]
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6
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Feng Y, Panwar N, Tng DJH, Tjin SC, Wang K, Yong KT. The application of mesoporous silica nanoparticle family in cancer theranostics. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.04.019] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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7
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Generation Dependency of Stimuli-Responsive Dendron-Gated Mesoporous Silica Nanocontainers. Macromol Res 2016. [DOI: 10.1007/s13233-016-4056-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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8
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Mohammadzadeh M, Nourbakhsh MS, Khodaverdi E, Hadizadeh F, Omid Malayeri S. Enhanced Loading and Release of Non-Steroidal Anti-Inflammatory Drugs from Silica-Based Nanoparticle Carriers. Chem Biol Drug Des 2016; 88:370-9. [DOI: 10.1111/cbdd.12764] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/22/2016] [Accepted: 03/28/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Mostafa Mohammadzadeh
- Department of Biotechnology; Faculty of New Sciences and Technologies; Semnan University; Semnan 35131-1911 Iran
| | - Mohammad Sadegh Nourbakhsh
- Department of Biotechnology; Faculty of New Sciences and Technologies; Semnan University; Semnan 35131-1911 Iran
| | - Elham Khodaverdi
- Targeted Drug Delivery Research Center; School of Pharmacy; Mashhad University of Medical Sciences; Mashhad 1365-91775 Iran
| | - Farzin Hadizadeh
- Biotechnology Research Center; School of Pharmacy; Mashhad University of Medical Sciences; Mashhad 1365-91775 Iran
| | - Sina Omid Malayeri
- Student Research Committee; School of Pharmacy; Mashhad University of Medical Sciences; Mashhad 1365-91775 Iran
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9
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Nietzold C, Dietrich P, Lippitz A, Panne U, Unger W. Cyclodextrin - ferrocene host - guest complexes on silicon oxide surfaces. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.5958] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- C. Nietzold
- BAM Federal Institute for Materials Research and Testing; Unter den Eichen 87; Berlin 12205 Germany
| | - P. M. Dietrich
- BAM Federal Institute for Materials Research and Testing; Unter den Eichen 87; Berlin 12205 Germany
| | - A. Lippitz
- BAM Federal Institute for Materials Research and Testing; Unter den Eichen 87; Berlin 12205 Germany
| | - U. Panne
- BAM Federal Institute for Materials Research and Testing; Unter den Eichen 87; Berlin 12205 Germany
| | - W. E. S. Unger
- BAM Federal Institute for Materials Research and Testing; Unter den Eichen 87; Berlin 12205 Germany
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Aznar E, Oroval M, Pascual L, Murguía JR, Martínez-Máñez R, Sancenón F. Gated Materials for On-Command Release of Guest Molecules. Chem Rev 2016; 116:561-718. [DOI: 10.1021/acs.chemrev.5b00456] [Citation(s) in RCA: 381] [Impact Index Per Article: 47.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Elena Aznar
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Unidad mixta Universitat Politècnica de València-Universitat de València, Camino
de Vera s/n, 46022 València, Spain
- CIBER
de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN)
| | - Mar Oroval
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Unidad mixta Universitat Politècnica de València-Universitat de València, Camino
de Vera s/n, 46022 València, Spain
- CIBER
de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN)
| | - Lluís Pascual
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Unidad mixta Universitat Politècnica de València-Universitat de València, Camino
de Vera s/n, 46022 València, Spain
- CIBER
de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN)
| | - Jose Ramón Murguía
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Unidad mixta Universitat Politècnica de València-Universitat de València, Camino
de Vera s/n, 46022 València, Spain
- Departamento
de Biotecnología, Universitat Politècnica de València, Camino
de Vera s/n, 46022 València, Spain
- CIBER
de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN)
| | - Ramón Martínez-Máñez
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Unidad mixta Universitat Politècnica de València-Universitat de València, Camino
de Vera s/n, 46022 València, Spain
- Departamento
de Química, Universitat Politècnica de València, Camino
de Vera s/n, 46022 València, Spain
- CIBER
de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN)
| | - Félix Sancenón
- Instituto
Interuniversitario de Investigación de Reconocimiento Molecular
y Desarrollo Tecnológico (IDM), Unidad mixta Universitat Politècnica de València-Universitat de València, Camino
de Vera s/n, 46022 València, Spain
- Departamento
de Química, Universitat Politècnica de València, Camino
de Vera s/n, 46022 València, Spain
- CIBER
de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN)
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Rühle B, Datz S, Argyo C, Bein T, Zink JI. A molecular nanocap activated by superparamagnetic heating for externally stimulated cargo release. Chem Commun (Camb) 2016; 52:1843-6. [DOI: 10.1039/c5cc08636a] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel thermoresponsive snaptop for stimulated cargo release from superparamagnetic iron oxide core – mesoporous silica shell nanoparticles based on a [2 + 4] cycloreversion reaction (retro-Diels Alder reaction) is presented.
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Affiliation(s)
- B. Rühle
- Department of Chemistry and Biochemistry
- University of California Los Angeles
- Los Angeles
- USA
| | - S. Datz
- Department of Chemistry and Center for NanoScience (CeNS)
- University of Munich (LMU)
- 81377 München
- Germany
| | - C. Argyo
- Department of Chemistry and Center for NanoScience (CeNS)
- University of Munich (LMU)
- 81377 München
- Germany
| | - T. Bein
- Department of Chemistry and Center for NanoScience (CeNS)
- University of Munich (LMU)
- 81377 München
- Germany
| | - J. I. Zink
- Department of Chemistry and Biochemistry
- University of California Los Angeles
- Los Angeles
- USA
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13
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Knežević NŽ, Durand J. Targeted Treatment of Cancer with Nanotherapeutics Based on Mesoporous Silica Nanoparticles. Chempluschem 2015. [DOI: 10.1002/cplu.201402369] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nikola Ž. Knežević
- Faculty of Pharmacy, European University, Trg mladenaca 5, 21000 Novi Sad (Serbia)
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS‐UM2‐ENSCM‐UM1, CC1701 Equipe Chimie Moléculaire et Organisation du Solide, Place Eugène Bataillon, 34095 Montpellier Cedex 05 (France)
| | - Jean‐Olivier Durand
- Institut Charles Gerhardt Montpellier, UMR 5253 CNRS‐UM2‐ENSCM‐UM1, CC1701 Equipe Chimie Moléculaire et Organisation du Solide, Place Eugène Bataillon, 34095 Montpellier Cedex 05 (France)
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Alberti S, Soler-Illia GJAA, Azzaroni O. Gated supramolecular chemistry in hybrid mesoporous silica nanoarchitectures: controlled delivery and molecular transport in response to chemical, physical and biological stimuli. Chem Commun (Camb) 2015; 51:6050-75. [DOI: 10.1039/c4cc10414e] [Citation(s) in RCA: 137] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This Feature Article discusses recent advances in the design of mesoporous silica nanoarchitectures that can control mass transport on command through the combination of flexible supramolecular routes.
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Affiliation(s)
- Sebastián Alberti
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) – Universidad Nacional de La Plata – CONICET
- CC 16 Suc. 4 (1900) La Plata
- Argentina
- Gerencia Química
- CNEA
| | | | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) – Universidad Nacional de La Plata – CONICET
- CC 16 Suc. 4 (1900) La Plata
- Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
- Buenos Aires
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15
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Song N, Yang YW. Molecular and supramolecular switches on mesoporous silica nanoparticles. Chem Soc Rev 2015; 44:3474-504. [DOI: 10.1039/c5cs00243e] [Citation(s) in RCA: 369] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarizes the recent advances of molecular and supramolecular switches installed on mesoporous silica nanoparticles.
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Affiliation(s)
- Nan Song
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC)
- Jilin University
- Changchun 130012
| | - Ying-Wei Yang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC)
- Jilin University
- Changchun 130012
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Siefker J, Karande P, Coppens MO. Packaging biological cargoes in mesoporous materials: opportunities for drug delivery. Expert Opin Drug Deliv 2014; 11:1781-93. [PMID: 25016923 PMCID: PMC4245185 DOI: 10.1517/17425247.2014.938636] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Confinement of biomolecules in structured nanoporous materials offers several desirable features ranging from chemical and thermal stability, to resistance to degradation from the external environment. A new generation of mesoporous materials presents exciting new possibilities for the formulation and controlled release of biological agents. Such materials address niche applications in enteral and parenteral delivery of biologics, such as peptides, polypeptides, enzymes and proteins for use as therapeutics, imaging agents, biosensors, and adjuvants. AREAS COVERED Mesoporous silica Santa Barbara Amorphous-15 (SBA-15), with its unique, tunable pore diameter, and easily functionalized surface, provides a representative example of this new generation of materials. Here, we review recent advances in the design and synthesis of nanostructured mesoporous materials, focusing on SBA-15, and highlight opportunities for the delivery of biological agents to various organ and tissue compartments. EXPERT OPINION The SBA-15 platform provides a delivery carrier that is inherently separated from the active biologic due to distinct intra and extra-particle environments. This permits the SBA-15 platform to not require direct modification of the active biological therapeutic. Additionally, this makes the platform universal and allows for its application independent of the desired methods of discovery and development. The SBA-15 platform also directly addresses issues of targeted delivery and controlled release, although future challenges in the implementation of this platform reside in particle design, biocompatibility, and the tunability of the internal and external material properties. Examples illustrating the flexibility in the application of the SBA-15 platform are also discussed.
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Affiliation(s)
- Justin Siefker
- University College London, Department of Chemical Engineering and EPSRC Frontier Engineering Centre for Nature Inspired Engineering,
Torrington Place, London, WC1E 7JE, UK
| | - Pankaj Karande
- Rensselaer Polytechnic Institute, Department of Chemical and Biological Engineering and Center for Biotechnology and Interdisciplinary Studies,
110 Eighth Street, Troy, NY 12180, USA+1 518 276 4459;
| | - Marc-Olivier Coppens
- University College London, Department of Chemical Engineering and EPSRC Frontier Engineering Centre for Nature Inspired Engineering,
Torrington Place, London, WC1E 7JE, UK+44 20 7679 7369; +44 20 7383 2348;
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Shen Q, Liu L, Zhang W. Fabrication of a photocontrolled surface with switchable wettability based on host-guest inclusion complexation and protein resistance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:9361-9369. [PMID: 25053175 DOI: 10.1021/la500792v] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A novel surface-modification strategy has been developed for the construction of a photocontrolled silicon wafer surface with switchable wettability based on host-guest inclusion complexation. The silicon wafer was first modified by guest molecule azobenzene (Azo) via a silanization reaction. Subsequently, a series of polymers with different polarities were attached to host molecule β-cyclodextrin (β-CD) to prepare β-CD-containing hemitelechelic polymers via click chemistry. Finally, a photocontrolled silicon wafer surface modified with polymers was fabricated by inclusion complexation between β-CD and Azo, and the surface properties of the substrate are dependent on the polymers we used. The elemental composition, surface morphology, and hydrophilic/hydrophobic property of the modified surfaces were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscope, and contact angle measurements, respectively. The antifouling property of the PEG-functionalized surface was evaluated by a protein adsorption assay using bovine serum albumin, which was also characterized by XPS. The results demonstrate that the surface modified with PEG possesses good protein-resistant properties.
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Affiliation(s)
- Qiongxia Shen
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology , 130 Meilong Road, Shanghai 200237, China
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18
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Guardado-Alvarez TM, Russell MM, Zink JI. Nanovalve activation by surface-attached photoacids. Chem Commun (Camb) 2014; 50:8388-90. [PMID: 24942753 PMCID: PMC4327900 DOI: 10.1039/c4cc03293d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Proton transfer caused by excitation of a photoacid attached to the surface of a mesoporous silica nanoparticle activates a nanovalve and causes release of trapped molecules. The protonation of an aniline-based stalk releases a noncovalently bound cyclodextrin molecule that blocked a pore. The results show that pH-responsive molecular delivery systems can be externally controlled using light.
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Affiliation(s)
- T M Guardado-Alvarez
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, California 90095-1569, USA.
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Théron C, Gallud A, Carcel C, Gary-Bobo M, Maynadier M, Garcia M, Lu J, Tamanoi F, Zink JI, Wong Chi Man M. Hybrid Mesoporous Silica Nanoparticles with pH-Operated and Complementary H-Bonding Caps as an Autonomous Drug-Delivery System. Chemistry 2014; 20:9372-80. [DOI: 10.1002/chem.201402864] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Indexed: 11/06/2022]
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20
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Choi E, Lu J, Tamanoi F, Zink JI. Drug Release from Three-Dimensional Cubic Mesoporous Silica Nanoparticles Controlled by Nanoimpellers. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201300503] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Xue M, Zink JI. An enzymatic chemical amplifier based on mechanized nanoparticles. J Am Chem Soc 2013; 135:17659-62. [PMID: 24224766 DOI: 10.1021/ja4066317] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A chemical amplifier was constructed based on enzyme-encapsulated mesoporous silica nanoparticles. By employing a supramolecular nanogate assembly that is capable of controlling the access to the encapsulated enzyme, selectivity toward substrate sizes is enabled. When an analyte molecule actuates the mechanical nanogate and exposes the enzymes, a catalytic production of fluorescent molecules is initiated. This study demonstrates a new concept of self-amplification of a chemical sensing process and can potentially increase the detection sensitivity.
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Affiliation(s)
- Min Xue
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
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