Volume 7

Issue 09,2014

(15 articles)


Yanyuan Zhao1, Maria de la Mata2, Richard L. J. Qiu3, Jun Zhang1, Xinglin Wen1, Cesar Magen4, Xuan P. A. Gao3, Jordi Arbiol2,5 (*), and Qihua Xiong1,6 (*)

Ultrathin (down to three quintuple layers (QL)) Bi2Te3 nanoplates have been synthesized through a vapor transport method, in which a Te-seeded epitaxial growth mechanism has been demonstrated. High optical contrast of few-QL Bi2Te3 on SiO2/Si substrates has been demonstrated experimentally and computationally.
2014, 7(9): 1243–1253

Zhencai Wang1, Wei Chen1 (*), Zhenliang Han1, Jie Zhu1, Na Lu1, Yun Yang1, Dekun Ma1, Ying Chen2, and Shaoming Huang1 (*)

A heterogeneous catalyst of Pd embedded in porous carbon (CMK-3) has been synthesized by a three-step method, and shows excellent performance in catalyzing Suzuki reactions. Importantly, ultrasonica- tion can effectively wet the pore channels and improve the mass transfer within them, and thus lead to quadrupled catalytic activity.
2014, 7(9): 1254–1262

Bei Wang1,§, Kristi L. Liddell2,§, Junjie Wang1, Brandon Koger1, Christine D. Keating2, and Jun Zhu1,3 (*)

This work reports the fabrication, functionalization and operation of a novel oxide-on-graphene field effect bio-ready sensor and its pH sensing is demonstrated.
2014, 7(9): 1263–1270

Shibin Deng1, Weigao Xu1, Jinying Wang1, Xi Ling2, Juanxia Wu1, Liming Xie3,Jing Kong2, Mildred S. Dresselhaus2,4, and Jin Zhang1 (*)

A polarization-difference technique is used to suppress the fluorescence background by subtracting two spectra collected using different excitation laser polarizations. As a result, enhancement factors are obtained ranging between 1.7 and 5.6 for the four Raman modes of rhodamine 6G at 611, 1,183, 1,361, and 1,647 cm–1 under resonant excitation by a 514.5 nm laser. By comparing these results with the results obtained under non-resonant excitation (632.8 nm) and pre-resonant excitation (593 nm), the enhancement can be attributed to static chemical enhancement (CHEM) and tuning of the molecular resonance.
2014, 7(9): 1271–1279

Baojiang Jiang1, Sanzhao Song1, Jianqiang Wang2, Ying Xie1, Wenyi Chu1, Hongfeng Li1, Hui Xu1, Chungui Tian1, and Honggang Fu1 (*)

Pd@PdO core–shell clusters are well-dispersed on N-doped graphene (NDG) due to the influence of nitrogen on the nucleation and growth kinetics of the metal nanoparticles. The Pd@PdO–NDG catalysts exhibit high performance and good structural stability for C–C cross coupling reactions.
2014, 7(9): 1280–1290

Nannan Wang1,§, Zilong Zhao1,§, Yifan Lv1, Huanhuan Fan1, Huarong Bai1, Hongmin Meng1, Yuqian Long1, Ting Fu1, Xiaobing Zhang1, and Weihong Tan1,2 (*)

The acidic microenvironment in tumors drives chlorin e6–pHLIPss– AuNR conjugates to tumor cells for bimodal photodynamic and photothermal therapy.
2014, 7(9): 1291–1301

Jinhee Han1, Matthew Tan2, Lakshmana Sudheendra1, Robert H. Weiss2,3, and Ian M. Kennedy1 (*)

A nanoparticle-assembled photonic crystal (PC) is used to detect single nucleotide polymorphism (SNP). The PC-based assay exhibited the ability to detect the mutation in a very small number of gene copies, similar to the number detected using conventional real-time polymerase chain reaction (PCR).
2014, 7(9): 1302–1310

Lingqing Dong1,2,§, Hui Shi3,§, Kui Cheng1,§, Qi Wang3, Wenjian Weng1,4 (*), and Weiqiang Han1,2,5 (*)

The concentration and pKa value of the alcohol molecules employed as surfactants in the synthesis mixture both play important roles in determining the size and shape of SrTiO3 polyhedral submicro/ nanocrystals. The adsorption energy of alcohol molecules on SrTiO3 {110} facets depends on their pKa values, which are therefore critical for morphology control.
2014, 7(9): 1311–1318

Lei Li1,§, Anton Kovalchuk1,§, and James M. Tour1,2,3 (*)

A facile and cost-effective approach for the fabrication of the nano- composite material SnO2–reduced graphene oxide nanoribbons has been developed. The resulting composite demonstrates a high capacity, good rate performance, and an excellent cycling stability due to the synergistic combination of electrically conductive reduced graphene oxide nanoribbons and SnO2.
2014, 7(9): 1319–1326

Shuai Fang§, Chao Wang§, Jian Xiang, Liang Cheng, Xuejiao Song, Ligeng Xu, Rui Peng (*), and Zhuang Liu (*)

Aptamer-conjugated upconversion nanoparticles (UCNPs) have been used for the first time as nanoprobes to recognize tumor cells, and were then enriched by attaching magnetic nanoparticles (MNPs) and placing in the presence of a magnetic field. Owing to the autofluorescence-free nature of upconversion luminescence imaging, as well as the magnetic separation to further reduce background signals, our technique allows for highly sensitive detection and collection of small numbers of tumor cells spiked into healthy blood samples, and shows promise for the detection of circulating tumor cells (CTC) in medical diagnostics.
2014, 7(9): 1327–1336