邓文礼
主要从事利用扫描探针显微学技术研究单分子和分子组装、分子膜的表面化学修饰、隧道电子诱导分子光发射、扫描隧道显微学中的针尖样品距离分离和轨道媒介隧道谱。
个性化签名
- 姓名:邓文礼
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学术头衔:
博士生导师
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学科领域:
材料科学基础学科
- 研究兴趣:主要从事利用扫描探针显微学技术研究单分子和分子组装、分子膜的表面化学修饰、隧道电子诱导分子光发射、扫描隧道显微学中的针尖样品距离分离和轨道媒介隧道谱。
邓文礼,1984年毕业于重庆三峡学院化学系并在重庆市云阳县江口中学任教到89年, 92年获得四川大学有机化学专业硕士学位, 95年在电子科技大学信息材料工程学院获得电子材料与器件专业博士学位, 96至98年在中国科学院化学研究所作博士后研究, 98至2002年在日本国立材料科学研究所任研究员,2002至2004年在美国华盛顿州立大学化学系任高级研究员, 2004年6月被聘为华南理工大学材料科学与工程学院教授, 同年12月被评为博士生导师。现为国务院学位委员会及教育部学位授权评审专家、教育部全国优秀博士学位论文评选评审专家、教育部留学回国人员科研启动基金评审专家、国家留学基金委留学基金评审专家。
曾完成中国博士后科学基金项目,参与中国科学院重大项目“纳米结构材料表界面的扫描探针显微学” 、日本政府资助的5年重大项目“在电磁场作用下的光电转换” 、美国国家科学基金项目CHE0138409和美国化学会石油研究基金项目CHE0234726。94年获得电子科技大学“SEG”特别奖, 95年获得电子科技大学“长城”特别奖。在国际学术刊物J. Phys. Chem. B, J. Chem. Phys.等和国内学术刊物中国科学B集、科学通报等发表论文70余篇,其中50余篇为SCI、EI论文,发表论文被引用130余次,单篇论文最多被引用20余次,申请发明专利1项。
主要从事利用扫描探针显微学技术研究单分子和分子组装、分子膜的表面化学修饰、隧道电子诱导分子光发射、扫描隧道显微学中的针尖样品距离分离和轨道媒介隧道谱。近年又开展生物分子DNA的分子设计、化学合成、分子组装、微观结构、纳米构筑等的探索研究。已经组建“纳米技术与分子科学实验室”并承担国家自然科学基金、教育部留学回国科研启动基金、国家外专局引智基金、广东省科技计划和广州市科技攻关等项目多项,指导博士后、博士生、硕士生10余名。
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431
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成果数
11
邓文礼, Wenli DENG Daisuke FUJITA, Linjing YANG, Hitoshi NEJO and Chunli BAI
Jpn. J. Appl. Phys. Vol. 39 (2000)pp. L751-L754 Part 2, No. 7B, 15 July 2000,-0001,():
-1年11月30日
Self-assembled monolayers (SAMs) of 1,5-pentanedithiol and 1,9-nonanedithiol on Au (111) surfaces were used to adsorb copper ions (Cu2C) from an ethanolic solution of cupric chloride (CuCl2) by chemical interaction of thiol groups and copper ions assembling multilayer structures. Ellipsometry, contact angle measurement and X-ray photoelectron spectroscopy (XPS) confirmed that the alkanedithiol molecules formed SAMs with only one-ended thiol groups attached to the gold surface, leaving the other-ended thiol groups free, which is supported by the molecular mechanics calculation. XPS and X-ray Auger electron spectroscopy (XAES) not only indicate that copper ions deposited onto SAMs from the solution by the chemical reaction of copper ions with ended free thiol groups of SAMs, but more importantly demonstrate that copper is present in the C1 oxidation state in the multilayer system. Atomic force microscopy (AFM) was used to observe SAMs and multilayer structures.
multilayer formation,, copper ion,, self-assembled monolayers(, SAMs), ,, alkanedithiol
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【期刊论文】STM-induced photon emission from self-assembled porphyrin molecules on a Cu.100. surface
邓文礼, W. Deng, D. Fujita, T. Ohgi, S. Yokoyama, K. Kamikado, S. Mashiko
JOURNAL OF CHEMICAL PHYSICS VOLUME 117, NUMBER 10 8 SEPTEMBER 2002,-0001,():
-1年11月30日
An ultrahigh-vacuum scanning tunneling microscopy equipped with a conductive optical fiber tip and photon detector has been established to explore photon emission from a self-assembled monolayer (SAM) of Cu-tetra-[3,5-di-t-butylphenyl] porphyrin (Cu-TBPP) molecules on a Cu(100) surface. In a few nanometer scale areas, emitted photons from molecules induced by tunneling electrons were effectively collected within the near-field region through an apex of the conductive optical fiber tip. The photon emission can be attributed to the inelastic tunneling involving the optical fiber tip, the Cu-TBPP molecules, and the Cu~100! surface. We proposed two kinds of mechanisms in terms of the photon emission from a SAM of Cu-TBPP molecules on a Cu(100) surface. The quantum efficiency for molecular fluorescence induced by inelastic tunneling can be approximately estimated to be ;3.031026 photons per electron in the current experimental studies.
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邓文礼, Wenli Deng, K. W. Hipps
J. Phys. Chem. B 2003, 107, 10736-10740,-0001,():
-1年11月30日
Orbital-mediated tunneling spectra obtained in the STM environment are reported for nickel(II) tetra-phenylporphyrin, NiTPP, as a function of molecule-tip separation. Spectra were acquired over a range of tip motion of 0.42 nm. Spectra did not show the variation in band splitting with tip distance predicted by several models. It appears for molecules such as NiTPP that the average potential at the molecule is essentially the same as at the metal substrate, at least for gap resistance values greater than 500 M
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邓文礼, W. Deng, L. Yang, D. Fujita, H. Nejoh, C. Bai
Appl. Phys. A. 71, 639-642 (2000),-0001,():
-1年11月30日
Double-ended alkanedithiols, 1,9-nonanedithiol and 1,5-pentanedithiol, formed self-assembled monolayers (SAMs) on Au(l11) substrates and were used to adsorb silver ions from an ethanolic solution of silver nitrate and formed Ag–dithiol–Au multilayer structures. Ellipsometry, contact angle measurement and X-ray photoelectron spectroscopy (XPS) confirmed that the alkanedithiol molecules formed SAMs with only one-ended thiol groups attached to the Au substrates, which was supported by molecular mechanics calculation. XPS and X-ray Auger electron spectroscopy (XAES) indicated that silver ions were deposited onto the SAMs from the solution by the chemical reaction of silver nitrate with another-ended thiol groups of the SAMs. Atomic force microscopy (AFM) was used to observe SAMs and multilayer structures.
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【期刊论文】Construction of 1-Iodo-4-nitrobenzene Nanowires on Graphite
邓文礼, Zhongjie Jiang, Zhoufeng Wang , Wenli Deng
Solid State Phenomena Vols. 121-123 (2007) pp. 437-440,-0001,():
-1年11月30日
We dissolved 1-iodo-4-nitrobenzene in various solvents, including ethanol, benzene, toluene and dimethylacetamide, and prepared solution with different concentration from 10-2 M to 10-5 M. Epitaxial Au(111) film and graphite were used as substrates. Scanning tunneling microscope (STM) was used to observe structures of 1-iodo-4-nitrobenzene molecules on those substrates. Experimentally, we found that 1-iodo-4-nitrobenzene molecules constructed nanowires on graphite surface at room temperature in air. The mechanism of formation of nanowire is briefly discussed in this paper.
1-iodo-4-nitrobenzene,, nanowire,, construction,, mechanism,, scanning tunneling microscopy.,
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邓文礼, W. Deng, T. Ohgi, H. Nejo, D. Fujita
Appl. Phys. A 72, 595-601 (2001),-0001,():
-1年11月30日
Highly conductive and transparent indium tin oxide (ITO) thin films, each with a thickness of 100 nm, were deposited on glass and Si(100) by direct current (DC) magnetron sputtering under an argon (Ar) atmosphere using an ITO target composed of 95% indium oxide and 5% tin oxide for photon-STM use. X-ray diffraction, STM observations, resistivity and transmission measurements were carried out to study the formation of the films at substrate temperatures between 40 and 400 ◦C and the effects of thermal annealing in air between 200 and 400 ◦C for between 1 and 5 h. The film properties were highly dependent on deposition conditions and on post-deposition film treatment. The films deposited under an Ar atmosphere pressure of 1.7×10−3 Torr by DC power sputtering (100W) at substrate temperatures between 40 and 400 ◦C exhibited resistivities in the range 3.0–5.7×10−5 Ωm and transmissions in the range 71%–79%. After deposition and annealing in air at 300◦C for 1 h, the films showed resistivities in the range 2.9–4.0×10−5 Ωm and transmissions in the range 78%–81%. Resistivity and transmission measurements showed that in order to improve conductive and transparent properties, 2 h annealing in air at 300 ◦C was necessary. X-ray diffraction data supported the experimental measurements of resistivity and transmission on the studies of annealing time. The surface roughness and film uniformity improve with increasing substrate temperature. STM observations found the ITO films deposited at a substrate temperature of 325 ◦C, and up to 400 ◦C, had domains with crystalline structures. After deposition and annealing in air at 300 ◦C for 1 h the films still exhibited similar domains. However, after deposition at substrate temperatures from 40 ◦C to 300 ◦C, and annealing in air at 300◦C for 1 h, the films were shown to be amorphous. More importantly, the STM studies found that the ITO film surfaces were most likely to break after deposition at a substrate temperature of 325 ◦C and annealing in air at 300◦C for 2 or 3 h. Such findings give some inspiration to us in interpreting the effects of annealing on the improvement of conductive and transparent properties and on the transition of phases. In addition, correlations between the conductive/transparent properties and the phase transition, the annealing time and the phase transition, and the conductive/transparent properties and the annealing time have been investigated.
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【期刊论文】Biphasic transitions of a hairpin hexanucleotide triplex DNA
邓文礼, Imshik Lee , Wenli Deng, Linjing Yang, Chen Wang, Chunli Bai
I. Lee et al. Biophysical Chemistry 67 (1997) 159-165,-0001,():
-1年11月30日
The conformational transitions (helix-coil transitions) of three hairpin triple helices, models 5’.(A-G), + 5’-(T-C),-T,- (hrC-T), [CY]. S-&G), + 5’-(T-h’C),-T,-(C-T), [YC] and 5’.(A-G), + 5’-(T-h’C),-T,-(h’C-T), [YY], are characterized in this work by UV spectroscopy. Melting of these triplexes is biphasic. and the profiles are used to obtain the thermodynamic parameters. The thermodynamic properties of the hairpin triplex are Tm= 19.45°C and Δ Hvh, = 293. I2 kJ molt-’ for CY, Tm= 22.85°C and Δ Hvh, = 256.63 kJ mol- ’ for YC and Tm = 28.47 °Cand ΔHvh, = 234.68 kJ molt ’ for YY at pH 4.4. Those of the duplex are Tm = 30.5O°C and AH,, = 427.09 kJ molt-’ for CY, Tm= 32.96°C and Δ Hvh, = 374.47 kJ molt ’ for YC and Tm = 33.24°C and Δ Hvh, = 329.67 kJ mol- ’ for YY at pH 4.4. The distinct transitions of triplex to duplex and duplex to single strands are analyzed win g the nearest-neighbor Ising model. Electrostatic effects on each conformation are also analyzed. 0 1997 Elsevier Science B.V.
Conformational transitiona: Hairpin triplex DNA: UV spectroscopy: Electrostatic effects
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【期刊论文】Influence of 5-bromodeoxycytosine substitution on triplex DNA stability and conformation
邓文礼, Linjing Yang, Maozi Liu, Wenli Deng, Chen Wang, Chunli Bai, Lou-Sing Kan
L. Yang et al. Biophysical Chemistry 76 (1999) 25-34,-0001,():
-1年11月30日
Three triple-helical hairpin DNAs with substitution of 5-bromocytosine for cytosine in different strands have been investigated by molecular mechanics and Raman spectroscopy. The stability of the three substituted triplexes were compared with the corresponding unsubstituted triplex DNA by the molecular mechanics method. Base stacking interactions and strand]strand interactions of each triplex were analyzed in detail. Sugar conformations in these triplexes have been determined by both vibrational spectroscopy and molecular dynamics simulation. The hairpin triplexes with substitution occurring in strand I or both in strands I and III have the main sugar conformation of C39-endo, while the triplex with substitution occurring in strand III is the combination of C39-endo and C29-endo sugar conformation. Theoretical results are basically in agreement with experiments. Q 1999 Elsevier Science B.V. All rights reserved.
Stability, Conformation, Hairpin triplex, 5-Bromodeoxycytosine
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邓文礼, WANG Zhou-Feng, JIANG Zhong-Jie, QIAN Li-Ping, WANG Xian, DENG Wen-Li
结构化学2006年4月第25卷第4期/JIEGOU HUAXUE Chinese J. Struct. Chem. Vol. 25, No. 443-448,-0001,():
-1年11月30日
Scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) ere performed on monolayer film of NiTPP supported on Au(111) under ultrahigh vacuum (UHV) conditions. The constant current STM images show remarkable bias dependence. High resolution STM data clearly show the individual NiTPP molecules and allow easy differentiation between NiTPP and CoTPP reported before. Scanning tunneling spectra, as a function of molecule-tip separation, were acquired over a range of tip motion of 0.42 nm. Spectra do not show the variation in band splitting with tip distance. It appears for molecules such as NiTPP that the average potential at the molecule is essentially the same at the same metal substrate. For molecules of the height of NiTPP, the scanning tunneling spectra should give reliable occupied and unoccupied orbital energies over a wide range of tipmolecule distances.
nickel(, II), tetraphenylporphyrin, topography structure, scanning tunneling microscopy, scanning tunneling spectrum
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邓文礼, QIAN Li-Ping , WANG Xian, XU Di , WANG Zhou-Feng , JIANG Zhong-Jie DENG, Wen-Li
结构化学2006.8 25卷8期/JIEGOU HUAXUE Chinese J. Struct. Chem. Vol. 25, No. 8 992-996,-0001,():
-1年11月30日
We describe in this paper the fabrication of two-and one-dimensional nano-structures with organic molecular beam epitaxy (OMBE) principle based on controlled self-assembly by using adsorbate-ubstrate and intermolecular interactions that are important in molecular fabrication. Cu(100) single crystal was used as substrate in fabricating molecular nanostructures. Scanning tunneling microscopy (STM) experiments confirmed that Zn-tetra-[3,5-di-t-butylphenyl]porphyrin molecules can be used to fabricate both monolayer and molecular wire on Cu(100) surface simultaneously, and the latter is arranged on the terrace edges. We herein briefly discuss the selectivity in terms of a mechanism in which the highest occupied and lowest unoccupied molecular orbitals (HOMO and LUMO) of the molecules interact with the surface.
fabrication,, two-dimensional monolayer,, one-dimensional molecular wire,, Zn-tetra-[3,, 5-di-t-butylphenyl]porphyrin
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