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Oxide-on-graphene field effect bio-ready sensors

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Nano Research 2014年第9期7卷 1263-1270页

作者： Bei Wang Kristi L. Liddell Junjie Wang brandon Koger Christine D. Keating Jun Zhu Department of Physics The Pennsylvania State University University Park Pennsylvania 16802 USA Department of Chemistry The Pennsylvania State University University Park Pennsylvania 16802 USA Materials Research Institute The Pennsylvania State University University Park Pennsylvania 16802 USA

Electrical detection schemes using nanoscale devices offer fast and label-free alternatives to biosensing techniques based on chemical and optical interactions. Here we report on the design, fabrication, and operation of oxide-on-graphene ion-sensitive field effect sensor arrays using large-area graphene sheets synthesized by chemical vapor deposition. In this scheme, HfO2 and SiO2 thin films are deposited atop the graphene sheet and play the dual role of the sensing interface, as well as the passivation layer protecting the channel and electrodes underneath from direct contact with the electrolyte. We further demonstrate the functionalization of the SiO2 surface with 3-aminopropyltrimethoxysilane （APTMS）. The oxide-on-graphene sensors operate in solution with high stability and a high average mobility of 5,000 cm2/（V＇s）. As a proof of principle, we demonstrate pH sensing using the bare or the APTMS-functionalized SiO2 as the sensing surface. The measured sensitivities, 46 mV/pH and 43 mV/pH, respectively, agree well with existing studies. We further show that by applying the solution gate voltage in pulse, the hysteresis in the transfer curve of the graphene transducer can be eliminated, greatly improving the ionic potential resolution of the sensor. These experiments demonstrate the potential of oxide-on-graphene ion-sensitive field effect sensors in on-chip, label-free and real-time biosensing applications.

关键词： graphene biosensor pH sensor ISFET APTMS label-free

CNN-BiLSTM-Attention Model in Forecasting Wave Height over South-East China Seas

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Computers, Materials & Continua 2022年第10期73卷 2151-2168页

作者： Lina Wang Xilin Deng Peng Ge changming Dong brandon J.Bethel Leqing Yang Jinyue Xia School of Artificial Intelligence(School of Future Technology) Nanjing University of Information Science and Technology Nanjing210044China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai519080China School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing210044China International Business Machines Corporation(IBM) New York10504USA

Though numerical wave models have been applied widely to significant wave height prediction,they consume massive computing memory and their accuracy needs to be further *** this paper,a two-dimensional(2D)significant wave height(SWH)prediction model is established for the South and East China *** proposed model is trained by Wave Watch III(WW3)reanalysis data based on a convolutional neural network,the bidirectional long short-term memory and the attention mechanism(CNNBiLSTM-Attention).It adopts the convolutional neural network to extract spatial features of original wave height to reduce the redundant information input into the BiLSTM ***,the BiLSTM model is applied to fully extract the features of the associated information of time series ***,the attention mechanism is used to assign probability weight to the output information of the BiLSTM layer units,and finally,a training model is *** to 24-h prediction experiments are conducted under normal and extreme conditions,*** the normal wave condition,for 3-,6-,12-and 24-h forecasting,the mean values of the correlation coefficients on the test set are 0.996,0.991,0.980,and 0.945,*** corresponding mean values of the root mean square errors are measured at 0.063 m,0.105 m,0.172 m,and 0.281 m,*** the typhoon-forced extreme condition,the model based on CNN-BiLSTM-Attention is trained by typhooninduced SWH extracted from the WW3 reanalysis *** 3-,6-,12-and 24-h forecasting,the mean values of correlation coefficients on the test set are respectively 0.993,0.983,0.958,and 0.921,and the averaged root mean square errors are 0.159 m,0.257 m,0.437 m,and 0.555 m,*** model performs better than that trained by all the WW3 reanalysis *** result suggests that the proposed algorithm can be applied to the 2D wave forecast with higher accuracy and efficiency.

关键词： Conv2D CNN-BiLSTM-Attention wave forecasting significant wave height typhoon

Multifunctional to multistage delivery systems: The evolution of nanoparticles for biomedical applications

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Chinese Science Bulletin 2012年第31期57卷 3961-3971页

作者： MARTINEZ Jonathan O BROWN brandon S QUATTROCCHI Nicoletta EVANGELOPOULOS Michael FERRARI Mauro TASCIOTTI Ennio Department of Nanomedicine The Methodist Hospital Research Institute Graduate School of Biomedical Sciences The University of Texas at Houston

Nanomaterials are advancing in several directions with significant progress being achieved with respect to their synthesis, functionalization and biomedical application. In this review, we will describe several classes of prototypical nanocarriers, such as liposomes, silicon particles, and gold nanoshells, in terms of their individual function as well as their synergistic use. Active and passive targeting, photothermal ablation, and drug controlled release constitute some of the crucial functions identified to achieve a medical purpose. Current limitations in targeting, slow clearance, and systemic as well as local toxicity are addressed in reference to the recent studies that attempted to comprehend and solve these issues. The demand for a more sophisticated understanding of the impact of nanomaterials on the body and of their potential immune response underlies this discussion. Combined components are then discussed in the setting of multifunctional nanocarriers, a class of drug delivery systems we envisioned, proposed, and evolved in the last 5 years. In particular, our third generation of nanocarriers, the multistage vectors, usher in the new field of nanomedicine by combining several components onto multifunctional nanocarriers characterized by emerging properties and able to achieve synergistic effects.

关键词：生物医学应用纳米粒子多功能传递系统演变多级药物控制释放纳米载体

High-Content Screening and Analysis of Stem Cell-Derived Neural Interfaces Using a Combinatorial Nanotechnology and Machine Learning Approach

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Research 2023年第1期2022卷 153-167页

作者： Letao Yang Brian M.Conley Jinho Yoon Christopher Rathnam Thanapat Pongkulapa brandon Conklin Yannan Hou Ki-Bum Lee Department of Chemistry and Chemical Biology Rutgers UniversityThe State University of New JerseyPiscatawayNJ 08854USA

A systematic investigation of stem cell-derived neural interfaces can facilitate the discovery of the molecular mechanisms behind cell behavior in neurological disorders and accelerate the development of stem cell-based ***,high-throughput investigation of the cell-type-specific biophysical cues associated with stem cell-derived neural interfaces continues to be a significant obstacle to *** this end,we developed a combinatorial nanoarray-based method for high-throughput investigation of neural interface micro-/nanostructures(physical cues comprising geometrical,topographical,and mechanical aspects)and the effects of these complex physical cues on stem cell fate ***,by applying a machine learning(ML)-based analytical approach to a large number of stem cell-derived neural interfaces,we comprehensively mapped stem cell adhesion,differentiation,and proliferation,which allowed for the cell-type-specific design of biomaterials for neural interfacing,including both adult and human-induced pluripotent stem cells(hiPSCs)with varying genetic *** short,we successfully demonstrated how an innovative combinatorial nanoarray and ML-based platform technology can aid with the rational design of stem cell-derived neural interfaces,potentially facilitating precision,and personalized tissue engineering applications.

关键词： overcome neural rational

Advances in adjuvant systemic therapy for non-small-cell lung cancer

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World Journal of Clinical Oncology 2014年第4期5卷 633-645页

作者： David Leong Rajat Rai brandon Nguyen Andrew Lee Desmond Yip Department of Medical Oncology The Canberra Hospital Garran ACT 2605 Australia David Leong Desmond Yip ANU Medical School Australian National University Department of Radiation Oncology The Canberra Hospital Yamba Drive Garran ACT 2605 Australia

Non-small-cell lung cancer remains a leading cause of death around the world. For most cases, the only chance of cure comes from resection for localised disease, however relapse rates remain high following surgery. Data has emerged over recent years regarding the utility of adjuvant chemotherapy for improving disease-free and overall survival of patients following curative resection. This paper reviews the clinical trials that have been conducted in this area along with the studies integrating radiation therapy in the adjuvant setting. The role of prognostic gene signatures are reviewed as well as ongoing clinical trials including those incorporating biological or targeted therapies.

关键词： Carcinoma Non-small-cell lung Chemotherapy Adjuvant Radiotherapy Biological therapy Biomarker

Possibilities and impossibilities of magnetic nanoparticle use in the control of infectious biofilms

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Journal of Materials Science & Technology 2021年第10期69卷 69-78页

作者： Kecheng Quan Zexin Zhang Yijin Ren Henk J.Busscher Henny C.van der Mei brandon W.Peterson College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China University of Groningen and University Medical Center Groningen Department of Biomedical Engineering9713 AVGroningenthe Netherlands University of Groningen and University Medical Center Groningen Department of OrthodonticsHanzeplein 19713 GZGroningenthe Netherlands

Targeting of chemotherapeutics towards a tumor site by magnetic nanocarriers is considered promising in *** nanoparticles are also considered for use in infection-control as a new means to prevent antimicrobial resistance from becoming the number one cause of death by the year *** this end,magnetic nanoparticles can either be loaded with an antimicrobial for use as a delivery vehicle or modified to acquire intrinsic antimicrobial *** nanoparticles can also be used for the local generation of heat to kill infectious *** appealing for tumor-and infectioncontrol,injection in the blood circulation may yield reticuloendothelial uptake and physical obstruction in organs that yield reduced targeting *** can be prevented with suitable surface ***,precise techniques to direct magnetic nanoparticles towards a target site are *** problem of precise targeting is aggravated in infection-control due to the micrometer-size of infectious biofilms,as opposed to targeting of nanoparticles towards centimeter-sized *** review aims to identify possibilities and impossibilities of magnetic targeting of nanoparticles for *** first review targeting techniques and the spatial resolution they can achieve as well as surface-chemical modifications of magnetic nanoparticles to enhance their targeting efficiency and antimicrobial *** is concluded that targeting problems encountered in tumor-control using magnetic nanoparticles,are neglected in most studies on their potential application in *** biofilm targeting by smart,self-adaptive and pH-responsive,antimicrobial nanocarriers for instance,seems easier to achieve than magnetic *** leads to the conclusion that magnetic targeting of nanoparticles for the control of micrometer-sized infectious biofilms may be less promising than initially ***,using propulsion rather than pr

关键词： Magnetic nanoparticles Magnetic targeting Biofilm Infection Antimicrobials

fficient and universal characterization of atomic structures through a topological graph order parameter

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npj Computational Materials 2022年第1期 334-345页

作者： James Chapman Nir Goldman brandon C.Wood Physical and Life Sciences Directorate Lawrence Livermore National LaboratoryLivermoreCAUSA Department of Chemical Engineering University of CaliforniaDavisCaliforniaCA95616United States

A graph-based order parameter,based on the topology of the graph itself,is introduced for the characterization of atomistic *** order parameter is universal to any material/chemical system and is transferable to all structural *** sets of data are used to validate both the generalizability and accuracy of the algorithm:(1)liquid lithium configurations spanning up to 300 GPa,(2)condensed phases of carbon along with nanotubes and buckyballs at ambient and high temperature,(3)a diverse set of aluminum configurations including surfaces,compressed and expanded lattices,point defects,grain boundaries,liquids,nanoparticles,all at nonzero temperatures,and(4)eleven niobium oxide crystal phases generated with ab initio molecular *** compare our proposed method to existing,state-of-the-art methods for the cases of aluminum and niobium *** order parameter uniquely classifies every configuration and outperforms all studied existing methods,opening the door for its use in a multitude of complex application spaces that can require fine structure-level characterization of atomistic graphs.

关键词： parameter configuration uniquely

Clinical epidemiology and disease burden of nonalcoholic fatty liver disease

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World Journal of Gastroenterology 2017年第47期23卷 8263-8276页

作者： brandon J Perumpail Muhammad Ali Khan Eric R Yoo George Cholankeril Donghee Kim Aijaz Ahmed Department of Medicine College of MedicineDrexel University Division of Gastroenterology and Hepatology Health Science CenterUniversity of Tennessee Department of Medicine Santa Clara Valley Medical Center Division of Gastroenterology and Hepatology Stanford University School of Medicine

Nonalcoholic fatty liver disease(NAFLD) is defined as the presence of hepatic fat accumulation after the exclusion of other causes of hepatic steatosis, including other causes of liver disease, excessive alcohol consumption, and other conditions that may lead to hepatic steatosis. NAFLD encompasses a broad clinical spectrum ranging from nonalcoholic fatty liver to nonalcoholic steatohepatitis(NASH), advanced fibrosis, cirrhosis, and finally hepatocellular carcinoma(HCC). NAFLD is the most common liver disease in the world and NASH may soon become the most common indication for liver transplantation. Ongoing persistence of obesity with increasing rate of diabetes will increase the prevalence of NAFLD, and as this population ages, many will develop cirrhosis and end-stage liver disease. There has been a general increase in the prevalence of NAFLD, with Asia leading the rise, yet the United States is following closely behind with a rising prevalence from 15% in 2005 to 25% within 5 years. NAFLD is commonly associated with metabolic comorbidities, including obesity, type Ⅱ diabetes, dyslipidemia, and metabolic syndrome. Our understanding of the pathophysiology of NAFLD is constantly evolving. Based on NAFLD subtypes, it has the potential to progress into advanced fibrosis, end-stage liver disease and HCC. The increasing prevalence of NAFLD with advanced fibrosis, is concerning because patients appear toexperience higher liver-related and non-liver-related mortality than the general population. The increased morbidity and mortality, healthcare costs and declining health related quality of life associated with NAFLD makes it a formidable disease, and one that requires more in-depth analysis.

关键词： Nonalcoholic fatty liver disease Hepatic steatosis Fatty liver Prevalence Incidence Fibrosis Risk factor Epidemiology Outcomes Nonalcoholic steatohepatitis

Behavior and modeling of tessellated shear walls in a structural frame system

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Resilient Cities and Structures 2023年第1期2卷 152-161页

作者： Mohammad Syed Pinar Okumus Negar Elhami-Khorasani brandon E.Ross Michael Carlos Barrios Kleiss Zachry Department of Civil and Environmental Engineering Texas A&M UniversityCollege StationTX 77843USA Department of Civil Structuraland Environmental EngineeringUniversity at BuffaloBuffaloNY 14260USA Glenn Department of Civil Engineering Clemson UniversityClemsonSC 29634-0911USA School of Architecture Clemson UniversityClemsonSC 29634-0911USA

This paper studies the behavior of a reinforced concrete(RC)structural frame employing a tessellated structuralarchitectural(TeSA)shear wall as the lateral-load resisting *** walls are made of interlocking modules(tiles)that provide easier repairability and replaceability.A nonlinearﬁnite element model of a TeSA wall with tiles interlocking in one direction(1-D interlocking)is validated using test *** RC frame from a building is modeled with a 1-D interlocking TeSA shear *** effects of varying rigidity of the wall-frame connections(rigid,hinged,slotted)on the lateral strength of the system and the axial load demands of the gravity-load resisting systems are ***,the effect of connection details on the damage of the TeSA wall is also *** study shows that the lateral strength of the system is the highest with a rigid connection between the wall and the system,followed by the system with hinged *** connections,which provided no vertical coupling between the wall and the frame result in the lowest lateral *** wall experienced“slight damage”up to a drift ratio of 2%.The system with rigid connections between the wall and the frame experienced the most damage,followed by system with hinged and slotted connections.

关键词： Modular shear wall Frame-wall connections Finite-element modeling Resiliency